Jan Beulich [Thu, 23 Mar 2006 10:59:45 +0000 (02:59 -0800)]
[PATCH] i386: actively synchronize vmalloc area when registering certain callbacks
Registering a callback handler through register_die_notifier() is obviously
primarily intended for use by modules. However, the way these currently
get called it is basically impossible for them to actually be used by
modules, as there is, on non-PAE configurationes, a good chance (the larger
the module, the better) for the system to crash as a result.
This is because the callback gets invoked
(a) in the page fault path before the top level page table propagation
gets carried out (hence a fault to propagate the top level page table
entry/entries mapping to module's code/data would nest infinitly) and
(b) in the NMI path, where nested faults must absolutely not happen,
since otherwise the IRET from the nested fault re-enables NMIs,
potentially resulting in nested NMI occurences.
Besides the modular aspect, similar problems would even arise for in-
kernel consumers of the API if they touched ioremap()ed or vmalloc()ed
memory inside their handlers.
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Stas Sergeev [Thu, 23 Mar 2006 10:59:41 +0000 (02:59 -0800)]
[PATCH] x86: early printk handling fixes
The history is that -mm kernels do not work for me for a few months
already. The things started from crashing somewhere after starting init,
and for the last month - no boot at all, just "Uncompressing... OK,
booting kernel", and silence. Early console didn't work too. With the
latest releases this degraded into an infinite stream of the "Unknown
interrupt or fault" messages. So today my patience ran out and I started
to think how can I collect at least some info for the bug-report. Attached
is the patch that allows to gather some valueable debug info on the problem
by making an early console more useable. I can't properly test the patch,
as the kernel still doesn't boot, so I'll explain it in details in a hope
someone else can justify the intrusive changes.
arch_hooks.h: added prototypes for setup_early_printk() and early_printk().
setup.c: killed wrong setup_early_printk() prototype. Moved
setup_early_printk() a bit earlier, as it was not "early enough" to cover
the bug I was fighting with.
early_printk.c: made it to start printing from the bottom of the screen,
otherwise the messages interfere with the ones of the boot-loader, so you
can't read them.
Signed-off-by: Stas Sergeev <stsp@aknet.ru> Cc: Andi Kleen <ak@muc.de> Cc: Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386)
ES7000 platform code clean up for compilation errors and a warning.
Ifdef'd the ACPI related parts in the ES7000 platform code. They were
causing compile errors in certain configuration (without ACPI defined). I
think this approach would be best (as opposed to Kconfig changes) since it
only touches the subarch...
Signed-off-by: <Natalie.Protasevich@unisys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Chuck Ebbert [Thu, 23 Mar 2006 10:59:36 +0000 (02:59 -0800)]
[PATCH] i386: fall back to sensible CPU model name
When vendor-specific i386 initialization code is unavailable the kernel
falls back to a default CPU model name. Make that model name reflect the
CPU family instead of an internal vendor index.
[PATCH] i386: Add a temporary to make put_user more type safe
In some code I am developing I had occasion to change the type of a
variable. This made the value put_user was putting to user space wrong.
But the code continued to build cleanly without errors.
Introducing a temporary fixes this problem and at least with gcc-3.3.5 does
not cause gcc any problems with optimizing out the temporary. gcc-4.x
using SSA internally ought to be even better at optimizing out temporaries,
so I don't expect a temporary to become a problem. Especially because in
all correct cases the types on both sides of the assignment to the
temporary are the same.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Chuck Ebbert [Thu, 23 Mar 2006 10:59:34 +0000 (02:59 -0800)]
[PATCH] i386: allow disabling X86_FEATURE_SEP at boot
Allow the x86 "sep" feature to be disabled at bootup. This forces use of the
int80 vsyscall. Mainly for testing or benchmarking the int80 vsyscall code.
Chuck Ebbert [Thu, 23 Mar 2006 10:59:33 +0000 (02:59 -0800)]
[PATCH] i386: __devinit should be __cpuinit
Several places in arch/i386/kernel/cpu and kernel/cpu were using __devinit
when they should have been __cpuinit. Fixing that saves ~4K when
CONFIG_HOTPLUG && !CONFIG_HOTPLUG_CPU.
Gerd Hoffmann [Thu, 23 Mar 2006 10:59:32 +0000 (02:59 -0800)]
[PATCH] x86: SMP alternatives
Implement SMP alternatives, i.e. switching at runtime between different
code versions for UP and SMP. The code can patch both SMP->UP and UP->SMP.
The UP->SMP case is useful for CPU hotplug.
With CONFIG_CPU_HOTPLUG enabled the code switches to UP at boot time and
when the number of CPUs goes down to 1, and switches to SMP when the number
of CPUs goes up to 2.
Without CONFIG_CPU_HOTPLUG or on non-SMP-capable systems the code is
patched once at boot time (if needed) and the tables are released
afterwards.
The changes in detail:
* The current alternatives bits are moved to a separate file,
the SMP alternatives code is added there.
* The patch adds some new elf sections to the kernel:
.smp_altinstructions
like .altinstructions, also contains a list
of alt_instr structs.
.smp_altinstr_replacement
like .altinstr_replacement, but also has some space to
save original instruction before replaving it.
.smp_locks
list of pointers to lock prefixes which can be nop'ed
out on UP.
The first two are used to replace more complex instruction
sequences such as spinlocks and semaphores. It would be possible
to deal with the lock prefixes with that as well, but by handling
them as special case the table sizes become much smaller.
* The sections are page-aligned and padded up to page size, so they
can be free if they are not needed.
* Splitted the code to release init pages to a separate function and
use it to release the elf sections if they are unused.
Chuck Ebbert [Thu, 23 Mar 2006 10:59:30 +0000 (02:59 -0800)]
[PATCH] i386: multi-column stack backtraces
Print stack backtraces in multiple columns, saving screen space. Number of
columns is configurable and defaults to one so behavior is
backwards-compatible.
Also removes the brackets around addresses when printing more
that one entry per line so they print as:
<address>
instead of:
[<address>]
This helps multiple entries fit better on one line.
Original idea by Dave Jones, taken from x86_64.
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Adrian Bunk [Thu, 23 Mar 2006 10:59:28 +0000 (02:59 -0800)]
[PATCH] i386: let REGPARM no longer depend on EXPERIMENTAL
REGPARM has already gotten much testing, what about removing the
dependency on EXPERIMENTAL?
Additionally, this patch does:
- remove the useless "default n"
- remove note regarding binary only modules (nowadays, there are even
some binary only modules compiled with REGPARM=y available)
Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Davi Arnaut [Thu, 23 Mar 2006 10:59:25 +0000 (02:59 -0800)]
[PATCH] Bug fixes and cleanup for the BSD Secure Levels LSM
This patch address several issues in the current BSD Secure Levels code:
o plaintext_to_sha1: Missing check for a NULL return from __get_free_page
o passwd_write_file: A page is leaked if the password is wrong.
o fix securityfs registration order
o seclvl_init is a mess and can't properly tolerate failures, failure
path is upside down (deldif and delf should be switched)
Cleanups:
o plaintext_to_sha1: Use buffers passed in
o passwd_write_file: Use kmalloc() instead of get_zeroed_page()
o passwd_write_file: hashedPassword comparison is just memcmp
o s/ENOSYS/EINVAL/
o misc
(akpm: after some discussion it appears that the BSD secure levels feature
should be scheduled for removal. But for now, let's fix these problems up).
Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Stephen Smalley <sds@epoch.ncsc.mil> Cc: James Morris <jmorris@namei.org> Cc: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patrick McHardy [Thu, 23 Mar 2006 10:59:24 +0000 (02:59 -0800)]
[PATCH] cciss: fix use-after-free in cciss_init_one
free_hba() sets hba[i] to NULL, the dereference afterwards results in this
crash. Setting busy_initializing to 0 actually looks unnecessary, but I'm
not entirely sure, which is why I left it in.
NeilBrown [Thu, 23 Mar 2006 10:59:22 +0000 (02:59 -0800)]
[PATCH] DM: Fix bug: BIO_RW_BARRIER requests to md/raid1 hang.
Both R1BIO_Barrier and R1BIO_Returned are 4 !!!!
This means that barrier requests don't get returned (i.e. b_endio called)
because it looks like they already have been.
Signed-off-by: Neil Brown <neilb@suse.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Anton Blanchard [Thu, 23 Mar 2006 10:59:20 +0000 (02:59 -0800)]
[PATCH] fix scheduler deadlock
We have noticed lockups during boot when stress testing kexec on ppc64.
Two cpus would deadlock in scheduler code trying to grab already taken
spinlocks.
The double_rq_lock code uses the address of the runqueue to order the
taking of multiple locks. This address is a per cpu variable:
This means we rely on the address of per cpu data increasing as cpu ids
increase. While this will be true for the generic percpu implementation it
may not be true for arch specific implementations.
One way to solve this is to always take runqueues in cpu id order. To do
this we add a cpu variable to the runqueue and check it in the
double runqueue locking functions.
Signed-off-by: Anton Blanchard <anton@samba.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Remove the assumption that driver_register() returns the number of devices
bound to the driver. In fact, it returns zero for success or a negative
error value.
All callers of macio_register_driver() either ignore the return value or
return it as the return value of a module_init() function.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Remove the assumption that driver_register() returns the number of devices
bound to the driver. In fact, it returns zero for success or a negative
error value.
Nobody uses the return value of of_register_driver() anyway.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Jean Delvare [Wed, 22 Mar 2006 07:20:26 +0000 (23:20 -0800)]
[PATCH] macintosh: cleanup the use of i2c headers
Cleanup the use of i2c headers in macintosh drivers.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Linus Torvalds [Thu, 23 Mar 2006 01:39:38 +0000 (17:39 -0800)]
scsi: link in the debug driver last
If the debug driver is built-in, link it in last, so that any real
drivers will probe first, rather than having the debug driver pick the
first scsi slots..
Signed-off-by: Douglas Gilbert <dougg@torque.net> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[TCP]: Do not use inet->id of global tcp_socket when sending RST.
[NETFILTER]: Fix undefined references to get_h225_addr
[NETFILTER]: futher {ip,ip6,arp}_tables unification
[NETFILTER]: Fix xt_policy address matching
[NETFILTER]: nf_conntrack: support for layer 3 protocol load on demand
[NETFILTER]: x_tables: set the protocol family in x_tables targets/matches
[NETFILTER]: conntrack: cleanup the conntrack ID initialization
[NETFILTER]: nfnetlink_queue: fix nfnetlink message size
[NETFILTER]: ctnetlink: Fix expectaction mask dumping
[NETFILTER]: Fix Kconfig typos
[NETFILTER]: Fix ip6tables breakage from {get,set}sockopt compat layer
* master.kernel.org:/home/rmk/linux-2.6-serial:
[SERIAL] Merge avlab serial board entries in parport_serial
[SERIAL] kernel console should send CRLF not LFCR
Eric Sesterhenn [Wed, 22 Mar 2006 21:49:48 +0000 (22:49 +0100)]
[PATCH] Use of uninitialized variable in drivers/net/depca.c
hi,
this fixes coverity bug #888, where the variable
dev is used uninitialized. I assume the programmer
meant to use mdev, which is initialized.
Compile tested only.
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Artur Skawina [Tue, 21 Mar 2006 21:04:36 +0000 (22:04 +0100)]
[PATCH] sis900 adm7001 PHY support
this patch is required to get a SIS964 based motherboard ethernet working (FSC D1875)
(picking the #1 transceiver, instead of the last one, in case no known ones were found
might be a better default, and would have worked in this case too)
Signed-off-by: Artur Skawina <art_k@o2.pl> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Frank Pavlic [Wed, 22 Mar 2006 15:03:44 +0000 (16:03 +0100)]
[PATCH] s390: qeth :allow setting of attribute "route6" to "no_router".
[patch 4/6] s390: qeth :allow setting of attribute "route6" to "no_router".
From: Ursula Braun <braunu@de.ibm.com>
when setting route6 attribute back to no_router qeth does not
issue an IP ASSIST command to reset router value to no_router.
Once primary_router is set device stays in this mode.
Issue an IP ASSIST command when no_router is set in route6.
Device will be reset and thus will not longer run as a primary
router.
Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
diffstat:
qeth_main.c | 5 -----
1 files changed, 5 deletions(-) Signed-off-by: Jeff Garzik <jeff@garzik.org>
Frank Pavlic [Wed, 22 Mar 2006 15:03:41 +0000 (16:03 +0100)]
[PATCH] s390: qeth driver cleanups
[patch 3/6] s390: qeth driver cleanups
From: Ursula Braun <braunu@de.ibm.com>
- code analyzing tool BEAM has found some unreachable
and unnecessary statements and also conditions
which are always true.
- removed some useless MII code since OSA card will never
allow to set such values.
Sergei Shtylylov [Wed, 22 Mar 2006 06:53:52 +0000 (22:53 -0800)]
[PATCH] AMD Au1xx0: fix Ethernet TX stats
With Au1xx0 Ethernet driver, TX bytes/packets always remain zero. The
problem seems to be that when packet has been transmitted, the length word
in DMA buffer is zero.
The patch updates the TX stats when a buffer is fed to DMA. The initial
2.4 patch was posted to linux-mips@linux-mips.org by Thomas Lange 21 Jan
2005.
Signed-off-by: Thomas Lange <thomas@corelatus.se> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Alan Cox [Wed, 22 Mar 2006 15:52:40 +0000 (15:52 +0000)]
[PATCH] libata: Fix a drive detection problem
The current code follows the spec but uses an overlong delay. This would
be great if the hardware did. Several vendors however forget the D7
pulldown. Fortunately 0xFF isnt a sane reset state so we can use it to
skip detection as is done in drivers/ide. (ie this is a tested solution
over a long time)
Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Right now I think the code is a nonsense. Most likely, I copied it from
old ip_build_xmit(), where it was really special, we had to decide
whether to generate unique ID when generating the first (well, the last)
fragment.
In ip_push_pending_frames() it does not make sense, it should use plain
ip_select_ident() instead.
Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
This patch moves {ip,ip6,arp}t_entry_{match,target} definitions to
x_tables.h. This move simplifies code and future compatibility fixes.
Signed-off-by: Dmitry Mishin <dim@openvz.org> Acked-off-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
[NETFILTER]: nf_conntrack: support for layer 3 protocol load on demand
x_tables matches and targets that require nf_conntrack_ipv[4|6] to work
don't have enough information to load on demand these modules. This
patch introduces the following changes to solve this issue:
o nf_ct_l3proto_try_module_get: try to load the layer 3 connection
tracker module and increases the refcount.
o nf_ct_l3proto_module put: drop the refcount of the module.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
[NETFILTER]: x_tables: set the protocol family in x_tables targets/matches
Set the family field in xt_[matches|targets] registered.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
[NETFILTER]: conntrack: cleanup the conntrack ID initialization
Currently the first conntrack ID assigned is 2, use 1 instead.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Fix oversized message, use NLMSG_SPACE just one since it reserves space
for the netlink header and NFA_SPACE for every attribute.
Thanks to Harald Welte for the feedback
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
The expectation mask has some particularities that requires a different
handling. The protocol number fields can be set to non-valid protocols,
ie. l3num is set to 0xFFFF. Since that protocol does not exist, the mask
tuple will not be dumped. Moreover, this results in a kernel panic when
nf_conntrack accesses the array of protocol handlers, that is PF_MAX (0x1F)
long.
This patch introduces the function ctnetlink_exp_dump_mask, that correctly
dumps the expectation mask. Such function uses the l3num value from the
expectation tuple that is a valid layer 3 protocol number. The value of the
l3num mask isn't dumped since it is meaningless from the userspace side.
Thanks to Yasuyuki Kozakai and Patrick McHardy for the feedback.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Victor [Wed, 22 Mar 2006 20:14:14 +0000 (20:14 +0000)]
[ARM] 3386/1: AT91RM9200 Clock update
Patch from Andrew Victor
This patch includes a few changes to the clock support on the
AT91RM9200.
1. Added definitions for Ethernet, MMC, TWI, USARTs, and SPI peripheral
clocks.
2. Replaced some hard-coded hex values with the text definitions in
at91rm9200_sys.h.
3. If the USB96M bit is set for PLLB, then the rate of PLLB is not
affected but only the USB Host/Device clocks which are derived from it.
Issue reported by Sergei Sharonov.
Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Andrew Victor [Wed, 22 Mar 2006 20:14:13 +0000 (20:14 +0000)]
[ARM] 3384/1: AT91RM9200: Timer
Patch from Andrew Victor
If the timer interrupt is ever significantly delayed (or after the
system was suspended), the system could spin incrementing the time for
too long.
The fix is to replace the "do {} while" with a "while {}".
Orignal patch by Savin Zlobec and Peter Menzebach.
Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 3381/1: ixp2000: fix slowport write timing control register fields
Patch from Lennert Buytenhek
The original version of the chip docs had the PW and SU fields in
the slowport write timing control register accidentally reversed.
This is mentioned in the errata (documentation change #4) and fixed
in newer docs.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
On the IXDP2x00s, the NPU that is PCI master is always the egress
(i.e. 'master') NPU. At least on the IXDP2800, both NPUs have flash,
so the ixp2000_has_flash() check in ixdp2x00_master_npu() is useless.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 3379/1: ixp2000: use generic 8250 debug macros
Patch from Lennert Buytenhek
The xscale UART in the ixp2000 is basically just an 8250 UART (with
some extra bits and pieces), so we can use the generic 8250 debug
macros on the ixp2000.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ixp2000 used to initially mark GPIO interrupts as invalid, and not
mark them valid until set_irq_type() was called, but this doesn't
work if you want to use request_irq() with the SA_TRIGGER_* flags.
So, just mark the GPIO interrupts valid from the beginning. We
configure GPIOs as inputs when set_irq_type() is called anyway, so
this shouldn't be a problem.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC64]: Add a secondary TSB for hugepage mappings.
[SPARC]: Respect vm_page_prot in io_remap_page_range().
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
[TG3]: Bump driver version and reldate.
[TG3]: Skip phy power down on some devices
[TG3]: Fix SRAM access during tg3_init_one()
[X25]: dte facilities 32 64 ioctl conversion
[X25]: allow ITU-T DTE facilities for x25
[X25]: fix kernel error message 64 bit kernel
[X25]: ioctl conversion 32 bit user to 64 bit kernel
[NET]: socket timestamp 32 bit handler for 64 bit kernel
[NET]: allow 32 bit socket ioctl in 64 bit kernel
[BLUETOOTH]: Return negative error constant
James Morris [Wed, 22 Mar 2006 08:09:22 +0000 (00:09 -0800)]
[PATCH] SELinux: add slab cache for inode security struct
Add a slab cache for the SELinux inode security struct, one of which is
allocated for every inode instantiated by the system.
The memory savings are considerable.
On 64-bit, instead of the size-128 cache, we have a slab object of 96
bytes, saving 32 bytes per object. After booting, I see about 4000 of
these and then about 17,000 after a kernel compile. With this patch, we
save around 530KB of kernel memory in the latter case. On 32-bit, the
savings are about half of this.
Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
James Morris [Wed, 22 Mar 2006 08:09:20 +0000 (00:09 -0800)]
[PATCH] SELinux: fix hard link count for selinuxfs root directory
A further fix is needed for selinuxfs link count management, to ensure that
the count is correct for the parent directory when a subdirectory is
created. This is only required for the root directory currently, but the
code has been updated for the general case.
Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
James Morris [Wed, 22 Mar 2006 08:09:19 +0000 (00:09 -0800)]
[PATCH] selinuxfs cleanups: sel_make_avc_files
Fix copy & paste error in sel_make_avc_files(), removing a supurious call to
d_genocide() in the error path. All of this will be cleaned up by
kill_litter_super().
Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
James Morris [Wed, 22 Mar 2006 08:09:18 +0000 (00:09 -0800)]
[PATCH] selinuxfs cleanups: sel_make_bools
Remove the call to sel_make_bools() from sel_fill_super(), as policy needs to
be loaded before the boolean files can be created. Policy will never be
loaded during sel_fill_super() as selinuxfs is kernel mounted during init and
the only means to load policy is via selinuxfs.
Also, the call to d_genocide() on the error path of sel_make_bools() is
incorrect and replaced with sel_remove_bools().
Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Unify the error path of sel_fill_super() so that all errors pass through the
same point and generate an error message. Also, removes a spurious dput() in
the error path which breaks the refcounting for the filesystem
(litter_kill_super() will correctly clean things up itself on error).
Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Stephen Smalley [Wed, 22 Mar 2006 08:09:13 +0000 (00:09 -0800)]
[PATCH] selinux: Disable automatic labeling of new inodes when no policy is loaded
This patch disables the automatic labeling of new inodes on disk
when no policy is loaded.
Discussion is here:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=180296
In short, we're changing the behavior so that when no policy is loaded,
SELinux does not label files at all. Currently it does add an 'unlabeled'
label in this case, which we've found causes problems later.
SELinux always maintains a safe internal label if there is none, so with this
patch, we just stick with that and wait until a policy is loaded before adding
a persistent label on disk.
The effect is simply that if you boot with SELinux enabled but no policy
loaded and create a file in that state, SELinux won't try to set a security
extended attribute on the new inode on the disk. This is the only sane
behavior for SELinux in that state, as it cannot determine the right label to
assign in the absence of a policy. That state usually doesn't occur, but the
rawhide installer seemed to be misbehaving temporarily so it happened to show
up on a test install.
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>
Paul Jackson [Wed, 22 Mar 2006 08:09:11 +0000 (00:09 -0800)]
[PATCH] mm: slab cache interleave rotor fix
The alien cache rotor in mm/slab.c assumes that the first online node is
node 0. Eventually for some archs, especially with hotplug, this will no
longer be true.
Fix the interleave rotor to handle the general case of node numbering.
Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Fix bogus node loop in hugetlb.c alloc_fresh_huge_page(), which was
assuming that nodes are numbered contiguously from 0 to num_online_nodes().
Once the hotplug folks get this far, that will be false.
Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] slab: fix drain_array() so that it works correctly with the shared_array
The list_lock also protects the shared array and we call drain_array() with
the shared array. Therefore we cannot go as far as I wanted to but have to
take the lock in a way so that it also protects the array_cache in
drain_pages.
(Note: maybe we should make the array_cache locking more consistent? I.e.
always take the array cache lock for shared arrays and disable interrupts
for the per cpu arrays?)
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] slab: make drain_array more universal by adding more parameters
And a parameter to drain_array to control the freeing of all objects and
then use drain_array() to replace instances of drain_array_locked with
drain_array. Doing so will avoid taking locks in those locations if the
arrays are empty.
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] slab: cache_reap(): further reduction in interrupt holdoff
cache_reap takes the l3->list_lock (disabling interrupts) unconditionally
and then does a few checks and maybe does some cleanup. This patch makes
cache_reap() only take the lock if there is work to do and then the lock is
taken and released for each cleaning action.
The checking of when to do the next reaping is done without any locking and
becomes racy. Should not matter since reaping can also be skipped if the
slab mutex cannot be acquired.
The same is true for the touched processing. If we get this wrong once in
awhile then we will mistakenly clean or not clean the shared cache. This
will impact performance slightly.
Note that the additional drain_array() function introduced here will fall
out in a subsequent patch since array cleaning will now be very similar
from all callers.
Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Make shrink_all_memory() repeat the attempts to free more memory if there
seems to be no pages to free.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Chen, Kenneth W [Wed, 22 Mar 2006 08:09:03 +0000 (00:09 -0800)]
[PATCH] optimize follow_hugetlb_page
follow_hugetlb_page() walks a range of user virtual address and then fills
in list of struct page * into an array that is passed from the argument
list. It also gets a reference count via get_page(). For compound page,
get_page() actually traverse back to head page via page_private() macro and
then adds a reference count to the head page. Since we are doing a virt to
pte look up, kernel already has a struct page pointer into the head page.
So instead of traverse into the small unit page struct and then follow a
link back to the head page, optimize that with incrementing the reference
count directly on the head page.
The benefit is that we don't take a cache miss on accessing page struct for
the corresponding user address and more importantly, not to pollute the
cache with a "not very useful" round trip of pointer chasing. This adds a
moderate performance gain on an I/O intensive database transaction
workload.
Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
projects / linux-2.6 / log