[PATCH] mm: add a new function (needed for swap suspend)
This adds the function get_swap_page_of_type() allowing us to specify an index
in swap_info[] and select a swap_info_struct structure to be used for
allocating a swap page.
This function (or another one of similar functionality) will be necessary for
implementing the image-writing part of swsusp in the user space. It can also
be used for simplifying the current in-kernel implementation of the
image-writing part of swsusp.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Make the suspend image size limit tunable via /sys/power/image_size.
It is necessary for systems on which there is a limited amount of swap
available for suspend. It can also be useful for optimizing performance of
swsusp on systems with 1 GB of RAM or more.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Limit the size of the suspend image to approx. 500 MB, which should
improve the overall performance of swsusp on systems with more than 1 GB of
RAM.
It introduces the constant IMAGE_SIZE that can be set to the preferred size
of the image (in MB) and modifies the memory-shrinking part of swsusp to
take this constant into account (500 is the default value of IMAGE_SIZE).
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick Mochel [Fri, 6 Jan 2006 08:15:20 +0000 (00:15 -0800)]
[PATCH] oss: remove deprecated PM interface from opl3sa2 driver
This change removes the old, deprecated interface from the opl3sa2 driver,
including the pm_{,un}register() calls, the local storage of the pmdev object
and the reference to the old header files. This change is done to assist in
eradicating the users of the legacy interface so as to help facilitate the
removal of the interface itself.
Signed-off-by: Patrick Mochel <mochel@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick Mochel [Fri, 6 Jan 2006 08:15:19 +0000 (00:15 -0800)]
[PATCH] oss: remove deprecated PM interface from nm256 driver
This change removes the old, deprecated interface from the nm256 driver,
including the pm_{,un}register() calls, the local storage of the pmdev object
and the reference to the old header files. This change is done to assist in
eradicating the users of the legacy interface so as to help facilitate the
removal of the interface itself.
Note that this driver has been obsoleted by an ALSA equivalent.
Signed-off-by: Patrick Mochel <mochel@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick Mochel [Fri, 6 Jan 2006 08:15:18 +0000 (00:15 -0800)]
[PATCH] oss: remove deprecated PM interface from maestro driver
This change removes the old, deprecated interface from the maestro driver,
including the pm_{,un}register() calls, the local storage of the pmdev object
and the reference to the old header files. This change is done to assist in
eradicating the users of the legacy interface so as to help facilitate the
removal of the interface itself.
The check_suspend() function and associated logic was not removed, even though
it is now unnecessary.
Note that this driver has been obsoleted by an ALSA equivalent.
Acked-by: Zach Brown <zab@zabbo.net> Signed-off-by: Patrick Mochel <mochel@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick Mochel [Fri, 6 Jan 2006 08:15:17 +0000 (00:15 -0800)]
[PATCH] oss: remove deprecated PM interface from cs46xx driver
This change removes the old, deprecated interface from the cs46xx driver,
including the pm_{,un}register() calls, the local storage of the pmdev object
and the reference to the old header files. This change is done to assist in
eradicating the users of the legacy interface so as to help facilitate the
removal of the interface itself.
Note this driver has PCI PM hooks which are set properly. It also has the
ability to trigger suspend/resume from an ioctl. This functionality was not
touched, though it could use a serious review if this driver continues to
persist in the mainline tree..
Note that this driver has been obsoleted by an ALSA equivalent.
Signed-off-by: Patrick Mochel <mochel@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick Mochel [Fri, 6 Jan 2006 08:15:14 +0000 (00:15 -0800)]
[PATCH] oss: remove deprecated PM interface from cs4281 driver
This change removes the old, deprecated interface from the cs4281 driver,
including the pm_{,un}register() calls, the local storage of the pmdev object
and the reference to the old header files. This change is done to assist in
eradicating the users of the legacy interface so as to help facilitate the
removal of the interface itself.
Note that this driver has been obsoleted by an ALSA equivalent.
Note that this driver has hooks for PCI power management, but does not
implement the ->suspend()/->resume() methods.
Signed-off-by: Patrick Mochel <mochel@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick Mochel [Fri, 6 Jan 2006 08:15:07 +0000 (00:15 -0800)]
[PATCH] oss: remove deprecated PM interface from ad1848 driver
This change removes the old, deprecated interface from the ad1848 driver,
including the pm_{,un}register() calls, the local storage of the pmdev object
and the reference to the old header files. This change is done to assist in
eradicating the users of the legacy interface so as to help facilitate the
removal of the interface itself.
Signed-off-by: Patrick Mochel <mochel@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch fixes a problem with the function enough_free_mem() used by
swsusp to verify if there is a sufficient number of memory pages available
to it to create and save the suspend image.
Namely, enough_free_mem() uses nr_free_pages() to obtain the number of free
memory pages, which is incorrect, because this function returns the total
number of free pages, including free highmem pages, and the highmem pages
cannot be used by swsusp for storing the image data.
The patch makes enough_free_mem() avoid counting the free highmem
pages as available to swsusp.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch makes swsusp free only as much memory as needed to complete the
suspend and not as much as possible. In the most of cases this should speed
up the suspend and make the system much more responsive after resume,
especially if a GUI (eg. X Windows) is used.
If needed, the old behavior (ie to free as much memory as possible during
suspend) can be restored by unsetting FAST_FREE in power.h
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch introduces the swap map structure that can be used by swsusp for
keeping tracks of data pages written to the swap. The structure itself is
described in a comment within the patch.
The overall idea is to reduce the amount of metadata written to the swap and
to write and read the image pages sequentially, in a file-alike way. This
makes the swap-handling part of swsusp fairly independent of its
snapshot-handling part and will hopefully allow us to completely separate
these two parts in the future.
This patch is needed to remove the suspend image size limit imposed by the
limited size of the swsusp_info structure, which is essential for x86-64
systems with more than 512 MB of RAM.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch removes the image encryption that is only used by swsusp instead of
zeroing the image after resume in order to prevent someone from reading some
confidential data from it in the future and it does not protect the image from
being read by an unauthorized person before resume. The functionality it
provides should really belong to the user space and will possibly be
reimplemented after the swap-handling functionality of swsusp is moved to the
user space.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ivan Kokshaysky [Fri, 6 Jan 2006 08:12:22 +0000 (00:12 -0800)]
[PATCH] Alpha: convert to generic irq framework (alpha part)
Kconfig tweaks and tons of deletions.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Christoph Hellwig <hch@lst.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ivan Kokshaysky [Fri, 6 Jan 2006 08:12:21 +0000 (00:12 -0800)]
[PATCH] Alpha: convert to generic irq framework (generic part)
Thanks to Christoph for doing most of the work.
This allows automatic SMP IRQ affinity assignment other than default "all
interrupts on all CPUs" which is rather expensive. This might be useful if
the hardware can be programmed to distribute interrupts among different
CPUs, like Alpha does.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Christoph Hellwig <hch@lst.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Shaohua Li [Fri, 6 Jan 2006 08:12:20 +0000 (00:12 -0800)]
[PATCH] cpu hotplug/x86_64: disable interrupt in play_dead
With physical CPU hotplug, the CPU is hot removed and it should not receive
any interrupts. Disabling interrupt is much safer. This basically is what we
do in ia64 & x86.
Signed-off-by: Shaohua Li <shaohua.li@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Vivek Goyal [Fri, 6 Jan 2006 08:12:19 +0000 (00:12 -0800)]
[PATCH] i386: ioapic virtual wire mode fix
o Currently, during kexec reboot, IOAPIC is re-programmed back to virtual
wire mode if there was an i8259 connected to it. This enables getting
timer interrupts in second kernel in legacy mode.
o After putting into virtual wire mode, IOAPIC delivers the i8259 interrupts
to CPU0. This works well for kexec but not for kdump as we might crash
on a different CPU and second kernel will not see timer interrupts.
o This patch modifies the redirection table entry to deliver the timer
interrupts to the cpu we are rebooting (instead of hardcoding to zero).
This ensures that second kernel receives timer interrupts even on a
non-boot cpu.
Brian Gerst [Fri, 6 Jan 2006 08:12:18 +0000 (00:12 -0800)]
[PATCH] mpspec: remove unneeded packed attribute
GCC 4.1 gives the following warning: include/asm/mpspec.h:79: warning:
`packed' attribute ignored for field of type `unsigned char'
The packed attribute isn't really necessary anyways so just remove it.
Signed-off-by: Brian Gerst <bgerst@didntduck.org> Acked-by: Dave Jones <davej@codemonkey.org.uk> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Larry Finger [Fri, 6 Jan 2006 08:12:17 +0000 (00:12 -0800)]
[PATCH] fix cpu frequency detection in arch/i386/kernel/timers/timer_tsc.c::recalibrate_cpu_khz()
When we re-calibrate the frequency, it is likely that an interrupt (as for
example the main system clock) will be triggered by the system. Therefore
the calibration may not be accurate. This will also provide a fix to bug
#5266.
Many thanks to Larry Finger for helping resolving this issue.
Signed-off-by: Bruno Ducrot <ducrot@poupinou.org> Cc: john stultz <johnstul@us.ibm.com> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Jordan Crouse [Fri, 6 Jan 2006 08:12:15 +0000 (00:12 -0800)]
[PATCH] Geode LX HW RNG Support
Add support to hw_random for the Geode LX HRNG device.
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Daniel Marjamaki <daniel.marjamaki@comhem.se> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Daniel Marjamaki <daniel.marjamaki@comhem.se> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Dave Jones [Fri, 6 Jan 2006 08:12:10 +0000 (00:12 -0800)]
[PATCH] x86: change_page_attr() fix
The 'make rodata read-only' patch in -mm exposes a latent bug in the 32-bit
change_page_attr() function, which causes certain CPUs (Those with NX
basically) to reboot instantly after pages are marked read-only.
The same bug got fixed a while back on x86-64, but never got propagated to
i386.
Stuart Hayes from Dell also picked up on this last June, but it never got
fixed, as the only thing affected by it aparently was the nvidia driver.
Blatantly stealing description from his post..
"It doesn't appear to be fixed (in the i386 arch). The
change_page_attr()/split_large_page() code will still still set all the
4K PTEs to PAGE_KERNEL (setting the _PAGE_NX bit) when a large page
needs to be split.
This wouldn't be a problem for the bulk of the kernel memory, but there
are pages in the lower 4MB of memory that's free, and are part of large
executable pages that also contain kernel code. If change_page_attr()
is called on these, it will set the _PAGE_NX bit on the whole 2MB region
that was covered by the large page, causing a large chunk of kernel code
to be non-executable."
Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Dave Jones <davej@redhat.com> Cc: <Stuart_Hayes@Dell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ashok Raj [Fri, 6 Jan 2006 08:12:08 +0000 (00:12 -0800)]
[PATCH] x86: convert bigsmp to use flat physical mode
When we bring up a new CPU via INIT/startup IPI messages, the CPU that's
coming up sends a xTPR message to the chipset. Intel chipsets (at least)
don't provide any architectural guarantee on what the chipset will do with
this message. For example, the E850x chipsets uses this xTPR message to
interpret the interrupt operating mode of the platform. When the CPU
coming online sends this message, it always indicates that it is in logical
flat mode. For the CPU hotplug case, the platform may already be
functioning in cluster APIC mode at this time, the chipset can get confused
and mishandle I/O device and IPI interrupt routing.
The situation eventually gets corrected when the new CPU sends another xTPR
update when we switch it to cluster mode, but there's a window during which
the chipset may be in an inconsistent state. This patch avoids this
problem by using the flat physical interrupt delivery mode instead of
cluster mode for bigsmp (>8 cpu) support.
Anton Blanchard [Fri, 6 Jan 2006 08:12:07 +0000 (00:12 -0800)]
[PATCH] allow flatmem to be disabled when only sparsemem is implemented
On architectures that implement sparsemem but not discontigmem we want to
be able to hide the flatmem option in some cases. On ppc64 for example,
when we select NUMA we must not select flatmem.
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Andy Whitcroft [Fri, 6 Jan 2006 08:12:06 +0000 (00:12 -0800)]
[PATCH] i386 sparsemem for single node systems
Allow SPARSEMEM to be enabled on non-numa x86 systems. This is made
dependant on EXPERIMENTAL also being set. When an in-tree user (such as
simulated numa) exists it should be made dependant on that.
The plan is to have no options and no selector as normal when
!EXPERIMENTAL. When EXPERIMENTAL we enable the FLATMEM and SPARSEMEM
options for X86_PC whilst maintaining DISCONTIGMEM and SPARSEMEM for NUMA.
Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] x86/x86_64: mark rodata section read-only: make some datastructures const
Mark some key kernel datastructures readonly. This patch was previously
posted on Jun 28th but was back then not merged because nothing was enforcing
rodata anyway.. well that changed now :)
Patch by Christoph Lameter <christoph@lameter.com> and Dave Jones
<davej@redhat.com>
Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] x86/x86_64: mark rodata section read only: generic x86-64 bugfix
Bug fix required for the .rodata work on x86-64:
when change_page_attr() and friends need to break up a 2Mb page into 4Kb
pages, it always set the NX bit on the PMD, which causes the cpu to consider
the entire 2Mb region to be NX regardless of the actual PTE perms. This is
fine in general, with one big exception: the 2Mb page that covers the last
part of the kernel .text! The fix is to not invent a new permission for the
new PMD entry, but to just inherit the existing one minus the PSE bit.
Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] x86/x86_64: mark rodata section read only: generic infrastructure
Generic prep-work for marking the .rodata section readonly:
* Align the rodata section at 4Kb boundary
* call the mark_rodata_ro() function when available
Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Zachary Amsden [Fri, 6 Jan 2006 08:11:59 +0000 (00:11 -0800)]
[PATCH] x86: Deprecate useless bug
Remove the "temporary debugging check" which has managed to live for quite
some time, and is clearly unneeded. The mm can never be live at this point,
so clearly checking the LDT in the mm->context is redundant as well.
Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Zachary Amsden [Fri, 6 Jan 2006 08:11:56 +0000 (00:11 -0800)]
[PATCH] x86: Fixed pnp bios limits
PnP BIOS data, code, and 32-bit entry segments all have fixed limits as well;
set them in the GDT rather than adding more code. It would be nice to add
these fixups to the boot GDT rather than setting the GDT for each CPU; perhaps
I can wiggle this in later, but getting it in before the subsys init looks
tricky.
Also, make some progress on deprecating the ugly Q_SET_SEL macros.
Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Zachary Amsden [Fri, 6 Jan 2006 08:11:55 +0000 (00:11 -0800)]
[PATCH] x86: Pnp byte granularity
The one remaining caller of set_limit, the PnP BIOS code, calls into the PnP
BIOS, passing kernel parameters in and out. These parameteres may be passed
from arbitrary kernel virtual memory, so they deserve strict protection to
stop a bad BIOS from smashing beyond the object size.
Unfortunately, the use of set_limit was badly botching this by setting the
limit in terms of pages, when it really should have byte granularity.
When doing this, I discovered my BIOS had the buggy code during the "get
system device node" call:
mov ax, es:[bx]
Which is harmless, but has a trivial workaround.
Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Zachary Amsden [Fri, 6 Jan 2006 08:11:53 +0000 (00:11 -0800)]
[PATCH] x86: Always relax segments
APM BIOSes have many bugs regarding proper representation of the appropriate
segment limits for calling the BIOS. By default, APM_RELAX_SEGMENTS is always
turned on to support running the APM BIOS on these buggy machines. Keeping
64k limits poses very little danger to the kernel, because the pages where the
APM BIOS is located will always be in low physical memory BIOS areas, which
should already be marked reserved, and only buggy BIOSes would possibly
overstep the segment bounds with writes to data anyway.
Since forcing stricter limits breaks many machines and is not default
behavior, it seems reasonable to deprecate the older code which may cause APM
BIOS to fault.
If you really have a badly enough broken APM BIOS that you have to turn off
APM_RELAX_SEGMENTS, seems like the best recourse here would be to disable the
APM BIOS and / or not compile it into your kernel to begin with, and / or add
your system to the known bad list.
The reason I want to deprecate this code is there is underlying brokenness
with the set_limit macros, and getting rid of many of the call sites rather
than rewriting them seems to be the simplest and most correct course of
action.
Signed-off-by: Zachary Amsden <zach@vmware.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Zachary Amsden [Fri, 6 Jan 2006 08:11:50 +0000 (00:11 -0800)]
[PATCH] x86: Cr4 is valid on some 486s
So some 486 processors do have CR4 register. Allow them to present it in
register dumps by using the old fault technique rather than testing processor
family.
Thanks to Maciej for noticing this.
Signed-off-by: Zachary Amsden <zach@vmware.com> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Jan Beulich [Fri, 6 Jan 2006 08:11:48 +0000 (00:11 -0800)]
[PATCH] i386: don't blindly enable interrupts in die()
Rather than blindly re-enabling interrupts in die(), save their state
upon entry and then restore that state.
If the kernel is in really bad condition and faults with interrupts disabled,
re-enabling them in die() may cause even more trouble, implying more chances
of data corruption.
Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Zachary Amsden [Fri, 6 Jan 2006 08:11:47 +0000 (00:11 -0800)]
[PATCH] x86: GDT alignment fix
Make GDT page aligned and page padded to support running inside of a
hypervisor. This prevents false sharing of the GDT page with other hot
data, which is not allowed in Xen, and causes performance problems in
VMware.
Rather than go back to the old method of statically allocating the GDT
(which wastes unneded space for non-present CPUs), the GDT for APs is
allocated dynamically.
David Howells [Fri, 6 Jan 2006 08:11:45 +0000 (00:11 -0800)]
[PATCH] frv: improve signal handling
The attached patch improves the signal handling:
(1) It makes do_signal() static as it isn't called from anywhere outside of
the arch code.
(2) It removes the regs argument to all the static functions within that file,
using __frame instead (which is the same thing held in a global register).
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Howells [Fri, 6 Jan 2006 08:11:44 +0000 (00:11 -0800)]
[PATCH] frv: fix signal handling
The attached patch makes FRV signal handling work properly:
(1) After do_notify_resume() has been called, the work flags must be checked
again (there may be another signal to deliver or the process might require
rescheduling for instance).
(2) After the signal frame is set up on the userspace stack, ptrace() should
be given an opportunity to single-step into the signal handler.
(3) The error state from setting up a signal frame should be passed back up
the call chain.
(4) The segfault handler shouldn't be preemptively reset in the arch if we
fail to deliver a SEGV signal: force_sig() will take care of that.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Howells [Fri, 6 Jan 2006 08:11:44 +0000 (00:11 -0800)]
[PATCH] FRV: Make futex code compilable on nommu [try #2]
Make the futex code compilable and usable on NOMMU by making the attempt to
handle page faults conditional on CONFIG_MMU. If this is not enabled, then
we can assume that EFAULT returned from futex_atomic_op_inuser() is not
recoverable, and that the address lies outside of valid memory.
handle_mm_fault() is made to BUG if called on NOMMU without attempting to
invoke the actual handler (__handle_mm_fault).
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Howells [Fri, 6 Jan 2006 08:11:43 +0000 (00:11 -0800)]
[PATCH] FRV: Implement futex operations for FRV
The attached patch implements futex operations for the FRV architecture. The
operations are applicable to both MMU and no-MMU modes; though the EFAULT
handling will be a little bit of wasted space on the latter.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Howells [Fri, 6 Jan 2006 08:11:42 +0000 (00:11 -0800)]
[PATCH] NOMMU: Make SYSV IPC SHM use ramfs facilities on NOMMU
The attached patch makes the SYSV IPC shared memory facilities use the new
ramfs facilities on a no-MMU kernel.
The following changes are made:
(1) There are now shmem_mmap() and shmem_get_unmapped_area() functions to
allow the IPC SHM facilities to commune with the tiny-shmem and shmem
code.
(2) ramfs files now need resizing using do_truncate() rather than by modifying
the inode size directly (see shmem_file_setup()). This causes ramfs to
attempt to bind a block of pages of sufficient size to the inode.
(3) CONFIG_SYSVIPC is no longer contingent on CONFIG_MMU.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Howells [Fri, 6 Jan 2006 08:11:41 +0000 (00:11 -0800)]
[PATCH] NOMMU: Provide shared-writable mmap support on ramfs
The attached patch makes ramfs support shared-writable mmaps by:
(1) Attempting to perform a contiguous block allocation to the requested size
when truncate attempts to increase the file from zero size, such as
happens when:
(2) Permitting any shared-writable mapping over any contiguous set of extant
pages. get_unmapped_area() will return the address into the actual ramfs
pages. The mapping may start anywhere and be of any size, but may not go
over the end of file. Multiple mappings may overlap in any way.
(3) Not permitting a file to be shrunk if it would truncate any shared
mappings (private mappings are copied).
Thus this patch provides support for POSIX shared memory on NOMMU kernels,
with certain limitations such as there being a large enough block of pages
available to support the allocation and it only working on directly mappable
filesystems.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ben Collins [Fri, 6 Jan 2006 08:11:40 +0000 (00:11 -0800)]
[PATCH] therm_adt746x: Quiet fan speed change messages
Only output the messages about fan speed changes with a verbose=1 module
param.
Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: Ben Collins <bcollins@ubuntu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Sylvain Munaut [Fri, 6 Jan 2006 08:11:36 +0000 (00:11 -0800)]
[PATCH] ppc32: Fix MPC52xx configuration space access
This patch takes care of an errata of the MPC5200 by avoiding 32 bits access
in type 1 configuration accesses. All others accesses are still 32 bits wide.
It also adds some mb() since the simple out_be(...) are not sufficient in
this case.
Sylvain Munaut [Fri, 6 Jan 2006 08:11:35 +0000 (00:11 -0800)]
[PATCH] ppc32: Remove __init qualifier from mpc52xx pci resources fixups
The mpc52xx_pci_fixup_resources is not only called at init but also when there
is a pci hotplug like when a cardbus card is plugged in. So that function is
needed after init too.
Thanks to Asier Llano Palacios for reporting this.
Sylvain Munaut [Fri, 6 Jan 2006 08:11:35 +0000 (00:11 -0800)]
[PATCH] ppc32: Modify Freescale MPC52xx IRQ mapping to _not_ use irq 0
AFAIK IRQ number 0 is a perfectly valid IRQ number. But it seems there are
numerous places where it's considered to be invalid or "no irq" value. Since
that value is problematic, the IRQ mapping is changed to not use it.
Sylvain Munaut [Fri, 6 Jan 2006 08:11:34 +0000 (00:11 -0800)]
[PATCH] ppc32: Fix static IO mapping for Freescale MPC52xx
The current iomapping used MBAR_SIZE for the size argument of
io_block_mapping, resulting in a call to setbat with a size argument of 64k
which is invalid.
This patch correct this and maps the whole 0xf0000000->0xffffffff range so
that devices on the local bus are also included in the BAT mapping.
Thanks to Bernhard Kuhn from Metrowerks for pointing this out.
Sylvain Munaut [Fri, 6 Jan 2006 08:11:32 +0000 (00:11 -0800)]
[PATCH] ppc32/serial: Change mpc52xx_uart.c to use the Low Density Serial port major
Before this patch we were just using the "classic" /dev/ttySx devices.
However when another on the system is loaded that uses those (like drivers for
serial PCMCIA), that creates a conflict for the minors. Therefore, we now use
/dev/ttyPSC[0:5] (note the 0-based numbering !) with some minors we've been
assigned in the "Low Density Serial port major"
Arthur Othieno [Fri, 6 Jan 2006 08:11:29 +0000 (00:11 -0800)]
[PATCH] macintosh: don't store i2c_add_driver() return if no further processing done
therm_pm72.c and windfarm_lm75_sensor.c both store the return from
i2c_add_driver() but do no further processing on the result. Simply return
what i2c_add_driver() did, instead.
Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Nicolas Kaiser [Fri, 6 Jan 2006 08:11:22 +0000 (00:11 -0800)]
[PATCH] selinux: ARRAY_SIZE cleanups
Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]).
Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Nick Piggin [Fri, 6 Jan 2006 08:11:20 +0000 (00:11 -0800)]
[PATCH] mm: page_state opt
Optimise page_state manipulations by introducing interrupt unsafe accessors
to page_state fields. Callers must provide their own locking (either
disable interrupts or not update from interrupt context).
Switch over the hot callsites that can easily be moved under interrupts off
sections.
Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Several counters already have the need to use 64 atomic variables on 64 bit
platforms (see mm_counter_t in sched.h). We have to do ugly ifdefs to fall
back to 32 bit atomic on 32 bit platforms.
The VM statistics patch that I am working on will also make more extensive
use of atomic64.
This patch introduces a new type atomic_long_t by providing definitions in
asm-generic/atomic.h that works similar to the c "long" type. Its 32 bits
on 32 bit platforms and 64 bits on 64 bit platforms.
Also cleans up the determination of the mm_counter_t in sched.h.
Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The use k in the inner loop means that the highest zone nr is always used
if any zone of a node is populated. This means that the policy zone is not
correctly determined on arches that do no use HIGHMEM like ia64.
Change the loop to decrement k which also simplifies the BUG_ON.
Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] mm: move determination of policy_zone into page allocator
Currently the function to build a zonelist for a BIND policy has the side
effect to set the policy_zone. This seems to be a bit strange. policy
zone seems to not be initialized elsewhere and therefore 0. Do we police
ZONE_DMA if no bind policy has been used yet?
This patch moves the determination of the zone to apply policies to into
the page allocator. We determine the zone while building the zonelist for
nodes.
Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Andrew Morton [Fri, 6 Jan 2006 08:11:14 +0000 (00:11 -0800)]
[PATCH] vmscan: balancing fix
Revert a patch which went into 2.6.8-rc1. The changelog for that patch was:
The shrink_zone() logic can, under some circumstances, cause far too many
pages to be reclaimed. Say, we're scanning at high priority and suddenly
hit a large number of reclaimable pages on the LRU.
Change things so we bale out when SWAP_CLUSTER_MAX pages have been
reclaimed.
Problem is, this change caused significant imbalance in inter-zone scan
balancing by truncating scans of larger zones.
Suppose, for example, ZONE_HIGHMEM is 10x the size of ZONE_NORMAL. The zone
balancing algorithm would require that if we're scanning 100 pages of
ZONE_HIGHMEM, we should scan 10 pages of ZONE_NORMAL. But this logic will
cause the scanning of ZONE_HIGHMEM to bale out after only 32 pages are
reclaimed. Thus effectively causing smaller zones to be scanned relatively
harder than large ones.
Now I need to remember what the workload was which caused me to write this
patch originally, then fix it up in a different way...
Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Nick Piggin [Fri, 6 Jan 2006 08:11:13 +0000 (00:11 -0800)]
[PATCH] mm: pfault optimisation
This atomic operation is superfluous: the pte will be added with the
referenced bit set, and the page will be referenced through this mapping after
the page fault handler returns anyway.
Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Nick Piggin [Fri, 6 Jan 2006 08:11:11 +0000 (00:11 -0800)]
[PATCH] mm: bad_page optimisation
Cut down size slightly by not passing bad_page the function name (it should be
able to be determined by dump_stack()). And cut down the number of printks in
bad_page.
Also, cut down some branching in the destroy_compound_page path.
Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
As find_lock_page() already checks with TestSetPageLocked() that page is
locked, there is no need to call lock_page() that will try-lock page again
(chances of page being unlocked in between are small). Call __lock_page()
directly, this saves one atomic operation.
Also, mark truncate-while-slept path as unlikely while we are here.
(akpm: ug. But this is actually a common path for normal old read()s against
a page which is under readahead I/O so ho-hum.)
David Howells [Fri, 6 Jan 2006 08:11:08 +0000 (00:11 -0800)]
[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm
The attached patch cleans up the way the bootmem allocator frees pages.
A new function, __free_pages_bootmem(), is provided in mm/page_alloc.c that is
called from mm/bootmem.c to turn pages over to the main allocator. All the
bits of code to initialise pages (clearing PG_reserved and setting the page
count) are moved to here. The checks on page validity are removed, on the
assumption that the struct page arrays will have been prepared correctly.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] Cleanup bootmem allocator and fix alloc_bootmem_low
Patch cleans up the alloc_bootmem fix for swiotlb. Patch removes
alloc_bootmem_*_limit api and fixes alloc_boot_*low api to do the right
thing -- allocate from low32 memory.
projects / linux-2.6 / log