* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
virtio: Add transport feature handling stub for virtio_ring.
virtio: Rename set_features to finalize_features
virtio: Formally reserve bits 28-31 to be 'transport' features.
s390: use virtio_console for KVM on s390
virtio: console as a config option
virtio_console: use virtqueue notification for hvc_console
hvc_console: rework setup to replace irq functions with callbacks
virtio_blk: check for hardsector size from host
virtio: Use bus_type probe and remove methods
virtio: don't always force a notification when ring is full
virtio: clarify that ABI is usable by any implementations
virtio: Recycle unused recv buffer pages for large skbs in net driver
virtio net: Allow receiving SG packets
virtio net: Add ethtool ops for SG/GSO
virtio: fix virtio_net xmit of freed skb bug
Rusty Russell [Fri, 25 Jul 2008 17:06:13 +0000 (12:06 -0500)]
virtio: Add transport feature handling stub for virtio_ring.
To prepare for virtio_ring transport feature bits, hook in a call in
all the users to manipulate them. This currently just clears all the
bits, since it doesn't understand any features.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Fri, 25 Jul 2008 17:06:07 +0000 (12:06 -0500)]
virtio: Rename set_features to finalize_features
Rather than explicitly handing the features to the lower-level, we just
hand the virtio_device and have it set the features. This make it clear
that it has the chance to manipulate the features of the device at this
point (and that all feature negotiation is already done).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This patch enables virtio_console as the default console on kvm for
s390. We currently use the same notify hack as lguest for early
console output. I will try to address this for lguest and s390 later.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
hvc_console: rework setup to replace irq functions with callbacks
This patch tries to change hvc_console to not use request_irq/free_irq if
the backend does not use irqs. This allows virtio_console to use hvc_console
without having a linker reference to request_irq/free_irq.
In addition, together with patch 2/3 it improves the performance for virtio
console input. (an earlier version of this patch was tested by Yajin on lguest)
The irq specific code is moved to hvc_irq.c and selected by the drivers that
use irqs (System p, System i, XEN).
I replaced "int irq" with the opaque "int data". The request_irq and
free_irq calls are replaced with notifier_add and notifier_del. I have also
changed the code a bit to call the notifier_add and notifier_del inside the
spinlock area as the callbacks are found via hp->ops.
Changes since last version:
o remove ifdef
o reintroduce "irq_requested" as "notified"
o cleanups, sparse..
I did not move the timer based polling into a separate polling scheme. I
played with several variants, but it seems we need to sleep/schedule in
a thread even for irq based consoles, as there are throttleing and buffer
size constraints.
I also kept hvc_struct defined in hvc_console.h so that hvc_irq.c can access
the irq_requested element.
Feedback is appreciated. virtio_console is currently the only available console
for kvm on s390. I plan to push this change as soon as all affected parties
agree on it. I would love to get test results from System p, Xen etc.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Currently virtio_blk assumes a 512 byte hard sector size. This can cause
trouble / performance issues if the backing has a different block size
(like a file on an ext3 file system formatted with 4k block size or a dasd).
Lets add a feature flag that tells the guest to use a different hard sector
size than 512 byte.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Fri, 25 Jul 2008 17:06:04 +0000 (12:06 -0500)]
virtio: don't always force a notification when ring is full
We force notification when the ring is full, even if the host has
indicated it doesn't want to know. This seemed like a good idea at
the time: if we fill the transmit ring, we should tell the host
immediately.
Unfortunately this logic also applies to the receiving ring, which is
refilled constantly. We should introduce real notification thesholds
to replace this logic. Meanwhile, removing the logic altogether breaks
the heuristics which KVM uses, so we use a hack: only notify if there are
outgoing parts of the new buffer.
Here are the number of exits with lguest's crappy network implementation:
Before:
network xmit 7859051 recv 236420
After:
network xmit 7858610 recv 118136
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell [Fri, 25 Jul 2008 17:06:03 +0000 (12:06 -0500)]
virtio: clarify that ABI is usable by any implementations
We want others to implement and use virtio, so it makes sense to BSD
license the non-__KERNEL__ parts of the headers to make this crystal
clear.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Mark McLoughlin <markmc@redhat.com> Acked-by: Ryan Harper <ryanh@us.ibm.com> Acked-by: Eric Van Hensbergen <ericvh@gmail.com> Acked-by: Anthony Liguori <aliguori@us.ibm.com>
Herbert Xu [Fri, 18 Apr 2008 03:24:27 +0000 (11:24 +0800)]
virtio net: Allow receiving SG packets
Finally this patch lets virtio_net receive GSO packets in addition
to sending them. This can definitely be optimised for the non-GSO
case. For comparison the Xen approach stores one page in each skb
and uses subsequent skb's pages to construct an SG skb instead of
preallocating the maximum amount of pages per skb.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (added feature bits)
Herbert Xu [Fri, 18 Apr 2008 03:21:42 +0000 (11:21 +0800)]
virtio net: Add ethtool ops for SG/GSO
This patch adds some basic ethtool operations to virtio_net so
I could test SG without GSO (which was really useful because TSO
turned out to be buggy :)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (remove MTU setting)
Mark McLoughlin [Tue, 27 May 2008 11:06:26 +0000 (12:06 +0100)]
virtio: fix virtio_net xmit of freed skb bug
On Mon, 2008-05-26 at 17:42 +1000, Rusty Russell wrote:
> If we fail to transmit a packet, we assume the queue is full and put
> the skb into last_xmit_skb. However, if more space frees up before we
> xmit it, we loop, and the result can be transmitting the same skb twice.
>
> Fix is simple: set skb to NULL if we've used it in some way, and check
> before sending.
...
> diff -r 564237b31993 drivers/net/virtio_net.c
> --- a/drivers/net/virtio_net.c Mon May 19 12:22:00 2008 +1000
> +++ b/drivers/net/virtio_net.c Mon May 19 12:24:58 2008 +1000
> @@ -287,21 +287,25 @@ again:
> free_old_xmit_skbs(vi);
>
> /* If we has a buffer left over from last time, send it now. */
> - if (vi->last_xmit_skb) {
> + if (unlikely(vi->last_xmit_skb)) {
> if (xmit_skb(vi, vi->last_xmit_skb) != 0) {
> /* Drop this skb: we only queue one. */
> vi->dev->stats.tx_dropped++;
> kfree_skb(skb);
> + skb = NULL;
> goto stop_queue;
> }
> vi->last_xmit_skb = NULL;
With this, may drop an skb and then later in the function discover that
we could have sent it after all. Poor wee skb :)
Currently we drop the skb in start_xmit() if we have a
queued buffer and fail to transmit it.
However, if we delay dropping it until we've stopped the
queue and enabled the tx notification callback, then there
is a chance space might become available for it.
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
CC fs/nfs/nfsroot.o
/home/bunk/linux/kernel-2.6/git/linux-2.6/fs/nfs/nfsroot.c:130: error: tokens causes a section type conflict
make[3]: *** [fs/nfs/nfsroot.o] Error 1
Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Suresh Siddha wants to fix a possible FPU leakage in error conditions,
but the fact that save/restore_i387() are inlines in a header file makes
that harder to do than necessary. So start off with an obvious cleanup.
This just moves the x86-64 version of save/restore_i387() out of the
header file, and moves it to the only file that it is actually used in:
arch/x86/kernel/signal_64.c. So exposing it in a header file was wrong
to begin with.
[ Side note: I'd like to fix up some of the games we play with the
32-bit version of these functions too, but that's a separate
matter. The 32-bit versions are shared - under different names
at that! - by both the native x86-32 code and the x86-64 32-bit
compatibility code ]
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (76 commits)
ide: use proper printk() KERN_* levels in ide-probe.c
ide: fix for EATA SCSI HBA in ATA emulating mode
ide: remove stale comments from drivers/ide/Makefile
ide: enable local IRQs in all handlers for TASKFILE_NO_DATA data phase
ide-scsi: remove kmalloced struct request
ht6560b: remove old history
ht6560b: update email address
ide-cd: fix oops when using growisofs
gayle: release resources on ide_host_add() failure
palm_bk3710: add UltraDMA/100 support
ide: trivial sparse annotations
ide: ide-tape.c sparse annotations and unaligned access removal
ide: drop 'name' parameter from ->init_chipset method
ide: prefix messages from IDE PCI host drivers by driver name
it821x: remove DECLARE_ITE_DEV() macro
it8213: remove DECLARE_ITE_DEV() macro
ide: include PCI device name in messages from IDE PCI host drivers
ide: remove <asm/ide.h> for some archs
ide-generic: remove ide_default_{io_base,irq}() inlines (take 3)
ide-generic: is no longer needed on ppc32
...
Merge branch 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-acpi-2.6
* 'release-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-acpi-2.6:
acpi: fix crash in core ACPI code, triggered by CONFIG_ACPI_PCI_SLOT=y
ACPI: thinkpad-acpi: don't misdetect in get_thinkpad_model_data() on -ENOMEM
ACPI: thinkpad-acpi: bump up version to 0.21
ACPI: thinkpad-acpi: add bluetooth and WWAN rfkill support
ACPI: thinkpad-acpi: WLSW overrides other rfkill switches
ACPI: thinkpad-acpi: prepare for bluetooth and wwan rfkill support
ACPI: thinkpad-acpi: consolidate wlsw notification function
ACPI: thinkpad-acpi: minor refactor on radio switch init
Revert "ACPI: don't walk tables if ACPI was disabled"
Revert "dock: bay: Don't call acpi_walk_namespace() when ACPI is disabled."
Revert "Fix FADT parsing"
ACPI : Set FAN device to correct state in boot phase
ACPI: Ignore _BQC object when registering backlight device
ACPI: stop complaints about interrupt link End Tags and blank IRQ descriptors
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI: fixup sparse endianness warnings in proc.c
PCI PM: make more PCI PM core functionality available to drivers
PCI/DMAR: don't assume presence of RMRRs
PCI hotplug: fix error path in pci_slot's register_slot
IDE probing code used to skip devices attached to EATA SCSI HBA
in ATA emulating mode but because of warm-plug support port I/O
resources are no longer freed if no devices are detected on a port
and the decision about the driver to use is left up to the user.
Remove no longer valid EATA SCSI HBA quirk from do_identify().
Noticed-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
gayle: release resources on ide_host_add() failure
"gayle: reserve memory resources at once" patch temporary removed
freeing of resources on failure (to ease convertion to ide_host_add()
interface). This patch fixes it.
Sergei Shtylyov [Thu, 24 Jul 2008 20:53:34 +0000 (22:53 +0200)]
palm_bk3710: add UltraDMA/100 support
This controller supports UltraDMA up to mode 5 but it should be clocked with
at least twice the data strobe frequency, so enable mode 5 for 100+ MHz IDECLK.
While at it, start passing the correct device to clk_get() -- it worked anyway
but WTF? :-/
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Harvey Harrison [Thu, 24 Jul 2008 20:53:33 +0000 (22:53 +0200)]
ide: ide-tape.c sparse annotations and unaligned access removal
If this is actually unaligned the access of speed/max_speed above
is already broken and needs a get_unaligned. Otherwise it is
aligned and they can be removed.
ide: prefix messages from IDE PCI host drivers by driver name
Prefix messages from IDE PCI host drivers by driver name instead of marketed
chipset name (it is still possible to exactly identify the particular chipset
basing on driver messages).
As a bonus this provides nice code savings for some drivers:
* Now that ide_hwif_t instances are allocated dynamically
the difference between MAX_HWIFS == 2 and MAX_HWIFS == 10
is ~100 bytes (x86-32) so use MAX_HWIFS == 10 on all archs
except these ones that use MAX_HWIFS == 1.
* Define MAX_HWIFS in <linux/ide.h> instead of <asm/ide.h>.
[ Please note that avr32/cris/v850 have no <asm/ide.h>
and alpha/ia64/sh always define CONFIG_IDE_MAX_HWIFS. ]
Move ide_probe_legacy() call to ide_generic_init() so it fails
early if necessary and returns the proper error value (nowadays
ide_default_io_base() is used only by ide-generic).
projects / linux-2.6 / log