Joerg Roedel [Fri, 22 May 2009 10:40:54 +0000 (12:40 +0200)]
amd-iommu: don't free dma adresses below 512MB with CONFIG_IOMMU_STRESS
This will test the automatic aperture enlargement code. This is
important because only very few devices will ever trigger this code
path. So force it under CONFIG_IOMMU_STRESS.
Joerg Roedel [Fri, 22 May 2009 10:27:53 +0000 (12:27 +0200)]
amd-iommu: disable round-robin allocator for CONFIG_IOMMU_STRESS
Disabling the round-robin allocator results in reusing the same
dma-addresses again very fast. This is a good test if the iotlb flushing
is working correctly.
Joerg Roedel [Mon, 4 May 2009 16:41:16 +0000 (18:41 +0200)]
amd-iommu: consolidate hardware initialization to one function
This patch restructures the AMD IOMMU initialization code to initialize
all hardware registers with one single function call.
This is helpful for suspend/resume support.
Joerg Roedel [Mon, 4 May 2009 13:06:20 +0000 (15:06 +0200)]
amd-iommu: introduce for_each_iommu* macros
This patch introduces the for_each_iommu and for_each_iommu_safe macros
to simplify the developers life when having to iterate over all AMD
IOMMUs in the system.
Chris Wright [Thu, 21 May 2009 07:56:58 +0000 (00:56 -0700)]
amd iommu: properly detach from protection domain on ->remove
Some drivers may use the dma api during ->remove which will
cause a protection domain to get reattached to a device. Delay the
detach until after the driver is completely unbound.
[ joro: added a little merge helper ]
[ Impact: fix too early device<->domain removal ]
Signed-off-by: Chris Wright <chrisw@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Neil Turton [Thu, 14 May 2009 13:08:11 +0000 (14:08 +0100)]
amd-iommu: fix the handling of device aliases in the AMD IOMMU driver.
The devid parameter to set_dev_entry_from_acpi is the requester ID
rather than the device ID since it is used to index the IOMMU device
table. The handling of IVHD_DEV_ALIAS used to pass the device ID.
This patch fixes it to pass the requester ID.
[ Impact: fix setting the wrong req-id in acpi-table parsing ]
Signed-off-by: Neil Turton <nturton@solarflare.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Neil Turton [Thu, 14 May 2009 13:00:35 +0000 (14:00 +0100)]
amd-iommu: fix an off-by-one error in the AMD IOMMU driver.
The variable amd_iommu_last_bdf holds the maximum bdf of any device
controlled by an IOMMU, so the number of device entries needed is
amd_iommu_last_bdf+1. The function tbl_size used amd_iommu_last_bdf
instead. This would be a problem if the last device were a large
enough power of 2.
Joerg Roedel [Fri, 22 May 2009 10:15:49 +0000 (12:15 +0200)]
x86/iommu: add IOMMU_STRESS Kconfig entry
This Kconfig option is intended to enable various code paths or
parameters in IOMMU implementations to stress test the code and/or the
hardware. This can also be done by disabling optimizations in the code
when this option is switched on.
Joerg Roedel [Wed, 20 May 2009 14:24:21 +0000 (16:24 +0200)]
amd-iommu: print ivmd information to dmesg when requested
Add information about device memory mapping requirements for the IOMMU
as described in the IVRS ACPI table to the kernel log if amd_iommu_dump
was specified on the kernel command line.
Joerg Roedel [Wed, 20 May 2009 13:41:28 +0000 (15:41 +0200)]
amd-iommu: print ivhd information to dmesg when requested
Add information about devices belonging to an IOMMU as described in the
IVRS ACPI table to the kernel log if amd_iommu_dump was specified on the
kernel command line.
Joerg Roedel [Wed, 20 May 2009 10:21:42 +0000 (12:21 +0200)]
amd-iommu: add amd_iommu_dump parameter
This kernel parameter will be useful to get some AMD IOMMU related
information in dmesg that is not necessary for the default user but may
be helpful in debug situations.
Linus Torvalds [Sat, 9 May 2009 00:00:41 +0000 (17:00 -0700)]
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6:
mtd: fix timeout in M25P80 driver
mtd: Bug in m25p80.c during whole-chip erase
mtd: expose subpage size via sysfs
mtd: mtd in mtd_release is unused without CONFIG_MTD_CHAR
Linus Torvalds [Fri, 8 May 2009 23:24:25 +0000 (16:24 -0700)]
Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze
* 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Fix return value for sys_ipc
microblaze: Storage class should be before const qualifier
Jean Delvare [Fri, 8 May 2009 18:27:28 +0000 (20:27 +0200)]
hwmon: (w83781d) Fix W83782D support (NULL pointer dereference)
Commit 360782dde00a2e6e7d9fd57535f90934707ab8a8 (hwmon: (w83781d) Stop
abusing struct i2c_client for ISA devices) broke W83782D support for
devices connected on the ISA bus. You will hit a NULL pointer
dereference as soon as you read any device attribute. Other devices,
and W83782D devices on the SMBus, aren't affected.
Reported-by: Michel Abraham Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Michel Abraham
Peter Horton [Fri, 8 May 2009 12:51:53 +0000 (13:51 +0100)]
mtd: fix timeout in M25P80 driver
Extend erase timeout in M25P80 SPI Flash driver.
The M25P80 drivers fails erasing sectors on a M25P128 because the ready
wait timeout is too short. Change the timeout from a simple loop count to a
suitable number of seconds.
Signed-off-by: Peter Horton <zero@colonel-panic.org> Tested-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The Xen pagetables are no longer implicitly reserved as part of the other
i386_start_kernel reservations, so make sure we explicitly reserve them.
This prevents them from being released into the general kernel free page
pool and reused.
Huang Ying [Fri, 8 May 2009 02:51:41 +0000 (10:51 +0800)]
x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP
Tim Starling reported that crashdump will panic with kernel compiled
with CONFIG_KEXEC_JUMP due to null pointer deference in
machine_kexec_32.c: machine_kexec(), when deferencing
kexec_image. Refering to:
http://bugzilla.kernel.org/show_bug.cgi?id=13265
This patch fixes the BUG via replacing global variable reference:
kexec_image in machine_kexec() with local variable reference: image,
which is more appropriate, and will not be null.
Same BUG is in machine_kexec_64.c too, so fixed too in the same way.
[ Impact: fix crash on kexec ]
Reported-by: Tim Starling <tstarling@wikimedia.org> Signed-off-by: Huang Ying <ying.huang@intel.com>
LKML-Reference: <1241751101.6259.85.camel@yhuang-dev.sh.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
With the introduction of the .brk section, special care must be taken
that no unused page table entries remain if _brk_end and _end are
separated by a 2M page boundary. cleanup_highmap() runs very early and
hence cannot take care of that, hence potential entries needing to be
removed past _brk_end must be cleared once the brk allocator has done
its job.
[ Impact: avoids undesirable TLB aliases ]
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Jan Beulich [Wed, 6 May 2009 12:02:19 +0000 (13:02 +0100)]
x86: fix boot hang in early_reserve_e820()
If the first non-reserved (sub-)range doesn't fit the size requested,
an endless loop will be entered. If a range returned from
find_e820_area_size() turns out insufficient in size, the range must
be skipped before calling the function again.
[ Impact: fixes boot hang on some platforms ]
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (32 commits)
[CIFS] Fix double list addition in cifs posix open code
[CIFS] Allow raw ntlmssp code to be enabled with sec=ntlmssp
[CIFS] Fix SMB uid in NTLMSSP authenticate request
[CIFS] NTLMSSP reenabled after move from connect.c to sess.c
[CIFS] Remove sparse warning
[CIFS] remove checkpatch warning
[CIFS] Fix final user of old string conversion code
[CIFS] remove cifs_strfromUCS_le
[CIFS] NTLMSSP support moving into new file, old dead code removed
[CIFS] Fix endian conversion of vcnum field
[CIFS] Remove trailing whitespace
[CIFS] Remove sparse endian warnings
[CIFS] Add remaining ntlmssp flags and standardize field names
[CIFS] Fix build warning
cifs: fix length handling in cifs_get_name_from_search_buf
[CIFS] Remove unneeded QuerySymlink call and fix mapping for unmapped status
[CIFS] rename cifs_strndup to cifs_strndup_from_ucs
Added loop check when mounting DFS tree.
Enable dfs submounts to handle remote referrals.
[CIFS] Remove older session setup implementation
...
David Howells [Thu, 7 May 2009 10:41:37 +0000 (11:41 +0100)]
NOMMU: Don't check vm_region::vm_start is page aligned in add_nommu_region()
Don't check vm_region::vm_start is page aligned in add_nommu_region() because
the region may reflect some non-page-aligned mapped file, such as could be
obtained from RomFS XIP.
Linus Torvalds [Thu, 7 May 2009 19:01:41 +0000 (12:01 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md:
md: remove rd%d links immediately after stopping an array.
md: remove ability to explicit set an inactive array to 'clean'.
md: constify VFTs
md: tidy up status_resync to handle large arrays.
md: fix some (more) errors with bitmaps on devices larger than 2TB.
md/raid10: don't clear bitmap during recovery if array will still be degraded.
md: fix loading of out-of-date bitmap.
Linus Torvalds [Tue, 5 May 2009 15:17:43 +0000 (08:17 -0700)]
random: make get_random_int() more random
It's a really simple patch that basically just open-codes the current
"secure_ip_id()" call, but when open-coding it we now use a _static_
hashing area, so that it gets updated every time.
And to make sure somebody can't just start from the same original seed of
all-zeroes, and then do the "half_md4_transform()" over and over until
they get the same sequence as the kernel has, each iteration also mixes in
the same old "current->pid + jiffies" we used - so we should now have a
regular strong pseudo-number generator, but we also have one that doesn't
have a single seed.
Note: the "pid + jiffies" is just meant to be a tiny tiny bit of noise. It
has no real meaning. It could be anything. I just picked the previous
seed, it's just that now we keep the state in between calls and that will
feed into the next result, and that should make all the difference.
I made that hash be a per-cpu data just to avoid cache-line ping-pong:
having multiple CPU's write to the same data would be fine for randomness,
and add yet another layer of chaos to it, but since get_random_int() is
supposed to be a fast interface I did it that way instead. I considered
using "__raw_get_cpu_var()" to avoid any preemption overhead while still
getting the hash be _mostly_ ping-pong free, but in the end good taste won
out.
Paul Gortmaker [Thu, 7 May 2009 15:18:40 +0000 (16:18 +0100)]
[ARM] 5507/1: support R_ARM_MOVW_ABS_NC and MOVT_ABS relocation types
From: Bruce Ashfield <bruce.ashfield@windriver.com>
To fully support the armv7-a instruction set/optimizations, support
for the R_ARM_MOVW_ABS_NC and R_ARM_MOVT_ABS relocation types is
required.
The MOVW and MOVT are both load-immediate instructions, MOVW loads 16
bits into the bottom half of a register, and MOVT loads 16 bits into the
top half of a register.
The relocation information for these instructions has a full 32 bit
value, plus an addend which is stored in the 16 immediate bits in the
instruction itself. The immediate bits in the instruction are not
contiguous (the register # splits it into a 4 bit and 12 bit value),
so the addend has to be extracted accordingly and added to the value.
The value is then split and put into the instruction; a MOVW uses the
bottom 16 bits of the value, and a MOVT uses the top 16 bits.
Signed-off-by: David Borman <david.borman@windriver.com> Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
NeilBrown [Thu, 7 May 2009 02:51:06 +0000 (12:51 +1000)]
md: remove rd%d links immediately after stopping an array.
md maintains link in sys/mdXX/md/ to identify which device has
which role in the array. e.g.
rd2 -> dev-sda
indicates that the device with role '2' in the array is sda.
These links are only present when the array is active. They are
created immediately after ->run is called, and so should be removed
immediately after ->stop is called.
However they are currently removed a little bit later, and it is
possible for ->run to be called again, thus adding these links, before
they are removed.
So move the removal earlier so they are consistently only present when
the array is active.
NeilBrown [Thu, 7 May 2009 02:50:57 +0000 (12:50 +1000)]
md: remove ability to explicit set an inactive array to 'clean'.
Being able to write 'clean' to an 'array_state' of an inactive array
to activate it in 'clean' mode is both unnecessary and inconvenient.
It is unnecessary because the same can be achieved by writing
'active'. This activates and array, but it still remains 'clean'
until the first write.
It is inconvenient because writing 'clean' is more often used to
cause an 'active' array to revert to 'clean' mode (thus blocking
any writes until a 'write-pending' is promoted to 'active').
Allowing 'clean' to both activate an array and mark an active array as
clean can lead to races: One program writes 'clean' to mark the
active array as clean at the same time as another program writes
'inactive' to deactivate (stop) and active array. Depending on which
writes first, the array could be deactivated and immediately
reactivated which isn't what was desired.
So just disable the use of 'clean' to activate an array.
This avoids a race that can be triggered with mdadm-3.0 and external
metadata, so it suitable for -stable.
Reported-by: Rafal Marszewski <rafal.marszewski@intel.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Cc: <stable@kernel.org> Signed-off-by: NeilBrown <neilb@suse.de>
NeilBrown [Thu, 7 May 2009 02:49:35 +0000 (12:49 +1000)]
md: tidy up status_resync to handle large arrays.
Two problems in status_resync.
1/ It still used Kilobytes as the basic block unit, while most code
now uses sectors uniformly.
2/ It doesn't allow for the possibility that max_sectors exceeds
the range of "unsigned long".
So
- change "max_blocks" to "max_sectors", and store sector numbers
in there and in 'resync'
- Make 'rt' a 'sector_t' so it can temporarily hold the number of
remaining sectors.
- use sector_div rather than normal division.
- change the magic '100' used to preserve precision to '32'.
+ making it a power of 2 makes division easier
+ it doesn't need to be as large as it was chosen when we averaged
speed over the entire run. Now we average speed over the last 30
seconds or so.
NeilBrown [Thu, 7 May 2009 02:49:06 +0000 (12:49 +1000)]
md: fix some (more) errors with bitmaps on devices larger than 2TB.
If a write intent bitmap covers more than 2TB, we sometimes work with
values beyond 32bit, so these need to be sector_t. This patches
add the required casts to some unsigned longs that are being shifted
up.
This will affect any raid10 larger than 2TB, or any raid1/4/5/6 with
member devices that are larger than 2TB.
NeilBrown [Thu, 7 May 2009 02:48:10 +0000 (12:48 +1000)]
md/raid10: don't clear bitmap during recovery if array will still be degraded.
If we have a raid10 with multiple missing devices, and we recover just
one of these to a spare, then we risk (depending on the bitmap and
array chunk size) clearing bits of the bitmap for which recovery isn't
complete (because a device is still missing).
This can lead to a subsequent "re-add" being recovered without
any IO happening, which would result in loss of data.
This patch takes the safe approach of not clearing bitmap bits
if the array will still be degraded.
This patch is suitable for all active -stable kernels.
NeilBrown [Thu, 7 May 2009 02:47:19 +0000 (12:47 +1000)]
md: fix loading of out-of-date bitmap.
When md is loading a bitmap which it knows is out of date, it fills
each page with 1s and writes it back out again. However the
write_page call makes used of bitmap->file_pages and
bitmap->last_page_size which haven't been set correctly yet. So this
can sometimes fail.
Move the setting of file_pages and last_page_size to before the call
to write_page.
This bug can cause the assembly on an array to fail, thus making the
data inaccessible. Hence I think it is a suitable candidate for
-stable.
Eric Piel [Wed, 6 May 2009 23:03:06 +0000 (16:03 -0700)]
initramfs: clean up messages related to initramfs unpacking
With the removal of duplicate unpack_to_rootfs() (commit df52092f3c97788592ef72501a43fb7ac6a3cfe0) the messages displayed do not
actually correspond to what the kernel is doing. In addition, depending
if ramdisks are supported or not, the messages are not at all the same.
So keep the messages more in sync with what is really doing the kernel,
and only display a second message in case of failure. This also ensure
that the printk message cannot be split by other printk's.
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Wed, 6 May 2009 23:03:05 +0000 (16:03 -0700)]
nommu: make the initial mmap allocation excess behaviour Kconfig configurable
NOMMU mmap() has an option controlled by a sysctl variable that determines
whether the allocations made by do_mmap_private() should have the excess
space trimmed off and returned to the allocator. Make the initial setting
of this variable a Kconfig configuration option.
The reason there can be excess space is that the allocator only allocates
in power-of-2 size chunks, but mmap()'s can be made in sizes that aren't a
power of 2.
There are two alternatives:
(1) Keep the excess as dead space. The dead space then remains unused for the
lifetime of the mapping. Mappings of shared objects such as libc, ld.so
or busybox's text segment may retain their dead space forever.
(2) Return the excess to the allocator. This means that the dead space is
limited to less than a page per mapping, but it means that for a transient
process, there's more chance of fragmentation as the excess space may be
reused fairly quickly.
During the boot process, a lot of transient processes are created, and
this can cause a lot of fragmentation as the pagecache and various slabs
grow greatly during this time.
By turning off the trimming of excess space during boot and disabling
batching of frees, Coldfire can manage to boot.
A better way of doing things might be to have /sbin/init turn this option
off. By that point libc, ld.so and init - which are all long-duration
processes - have all been loaded and trimmed.
David Howells [Wed, 6 May 2009 23:03:03 +0000 (16:03 -0700)]
nommu: clamp zone_batchsize() to 0 under NOMMU conditions
Clamp zone_batchsize() to 0 under NOMMU conditions to stop
free_hot_cold_page() from queueing and batching frees.
The problem is that under NOMMU conditions it is really important to be
able to allocate large contiguous chunks of memory, but when munmap() or
exit_mmap() releases big stretches of memory, return of these to the buddy
allocator can be deferred, and when it does finally happen, it can be in
small chunks.
Whilst the fragmentation this incurs isn't so much of a problem under MMU
conditions as userspace VM is glued together from individual pages with
the aid of the MMU, it is a real problem if there isn't an MMU.
By clamping the page freeing queue size to 0, pages are returned to the
allocator immediately, and the buddy detector is more likely to be able to
glue them together into large chunks immediately, and fragmentation is
less likely to occur.
By disabling batching of frees, and by turning off the trimming of excess
space during boot, Coldfire can manage to boot.
David Howells [Wed, 6 May 2009 23:03:02 +0000 (16:03 -0700)]
mm: use roundown_pow_of_two() in zone_batchsize()
Use roundown_pow_of_two(N) in zone_batchsize() rather than (1 <<
(fls(N)-1)) as they are equivalent, and with the former it is easier to
see what is going on.
Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Lanttor Guo <lanttor.guo@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Krzysztof Helt [Wed, 6 May 2009 23:03:00 +0000 (16:03 -0700)]
fbdev: remove makefile reference to removed driver
The cyblafb driver is removed so remove its last trace in the makefile.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ralph Wuerthner [Wed, 6 May 2009 23:02:59 +0000 (16:02 -0700)]
alloc_vmap_area: fix memory leak
If alloc_vmap_area() fails the allocated struct vmap_area has to be freed.
Signed-off-by: Ralph Wuerthner <ralphw@linux.vnet.ibm.com> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Randy Dunlap [Wed, 6 May 2009 23:02:58 +0000 (16:02 -0700)]
doc: small kernel-parameters updates
Change last "i386" to X86-32 as is used throughout the rest of the file.
Change combination of X86-32,X86-64 to just X86, as is done throughout the
rest of the file.
Add a note that hyphens and underscores are equivalent in parameter names,
with examples.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Jan Engelhardt <jengelh@medozas.de> Cc: Christopher Sylvain <chris.sylvain@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The software fillrect routines do not work properly when the number of
pixels per machine word is not an integer. To see that, run the following
command on a fbdev console with a 24bpp video mode, using a
non-accelerated driver such as (u)vesafb:
reset ; echo -e '\e[41mtest\e[K'
The expected result is 'test' displayed on a line with red background.
Instead of that, 'test' has a red background, but the rest of the line
(rendered using fillrect()) contains a distored colorful pattern.
This patch fixes the problem by correctly computing rotation shifts. It
has been tested in a 24bpp mode on 32- and 64-bit little-endian machines.
Signed-off-by: Michal Januszewski <spock@gentoo.org> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Rientjes [Wed, 6 May 2009 23:02:55 +0000 (16:02 -0700)]
oom: prevent livelock when oom_kill_allocating_task is set
When /proc/sys/vm/oom_kill_allocating_task is set for large systems that
want to avoid the lengthy tasklist scan, it's possible to livelock if
current is ineligible for oom kill. This normally happens when it is set
to OOM_DISABLE, but is also possible if any threads are sharing the same
->mm with a different tgid.
So change __out_of_memory() to fall back to the full task-list scan if it
was unable to kill `current'.
Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Josef Bacik [Wed, 6 May 2009 23:02:53 +0000 (16:02 -0700)]
fiemap: fix problem with setting FIEMAP_EXTENT_LAST
Fix a problem where the generic block based fiemap stuff would not
properly set FIEMAP_EXTENT_LAST on the last extent. I've reworked things
to keep track if we go past the EOF, and mark the last extent properly.
The problem was reported by and tested by Eric Sandeen.
Tested-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Josef Bacik <jbacik@redhat.com> Cc: <linux-ext4@vger.kernel.org> Cc: <xfs-masters@oss.sgi.com> Cc: <linux-btrfs@vger.kernel.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <Joel.Becker@oracle.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Split this case out into a separate call. This also shrinks the kernel
slightly:
text data bss dec hex filename 4802274 707668 712704 6222646 5ef336 vmlinux
text data bss dec hex filename 4799027 703572 712704 6215303 5ed687 vmlinux
due to removeing one argument from the commonly-called __WARN().
[akpm@linux-foundation.org: reduce scope of `empty'] Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The plan is to fix this via lockdep annotation, but that is proving to be
quite involved.
The patch flips the allocation over to GFP_NFS to shut the warning up, for
the 2.6.30 release.
Hopefully we will fix this for real in 2.6.31. I'll queue a patch in -mm
to switch it back to GFP_KERNEL so we don't forget.
=================================
[ INFO: inconsistent lock state ]
2.6.30-rc2-next-20090417 #203
---------------------------------
inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
kswapd0/380 [HC0[0]:SC0[0]:HE1:SE1] takes:
(&inode->inotify_mutex){+.+.?.}, at: [<ffffffff8112f1b5>] inotify_inode_is_dead+0x35/0xb0
{RECLAIM_FS-ON-W} state was registered at:
[<ffffffff81079188>] mark_held_locks+0x68/0x90
[<ffffffff810792a5>] lockdep_trace_alloc+0xf5/0x100
[<ffffffff810f5261>] __kmalloc_node+0x31/0x1e0
[<ffffffff81130652>] kernel_event+0xe2/0x190
[<ffffffff81130826>] inotify_dev_queue_event+0x126/0x230
[<ffffffff8112f096>] inotify_inode_queue_event+0xc6/0x110
[<ffffffff8110444d>] vfs_create+0xcd/0x140
[<ffffffff8110825d>] do_filp_open+0x88d/0xa20
[<ffffffff810f6b68>] do_sys_open+0x98/0x140
[<ffffffff810f6c50>] sys_open+0x20/0x30
[<ffffffff8100c272>] system_call_fastpath+0x16/0x1b
[<ffffffffffffffff>] 0xffffffffffffffff
irq event stamp: 690455
hardirqs last enabled at (690455): [<ffffffff81564fe4>] _spin_unlock_irqrestore+0x44/0x80
hardirqs last disabled at (690454): [<ffffffff81565372>] _spin_lock_irqsave+0x32/0xa0
softirqs last enabled at (690178): [<ffffffff81052282>] __do_softirq+0x202/0x220
softirqs last disabled at (690157): [<ffffffff8100d50c>] call_softirq+0x1c/0x50
other info that might help us debug this:
2 locks held by kswapd0/380:
#0: (shrinker_rwsem){++++..}, at: [<ffffffff810d0bd7>] shrink_slab+0x37/0x180
#1: (&type->s_umount_key#17){++++..}, at: [<ffffffff8110cfbf>] shrink_dcache_memory+0x11f/0x1e0
Alan Cox [Wed, 6 May 2009 16:17:26 +0000 (17:17 +0100)]
vt: Add a note on the historical abuse of CLOCK_TICK_RATE
This is one area where we can't just magic away the bizarre use of
CLOCK_TICK_RATE as it leaks to user space APIs. It also means the visible
CLOCK_TICK_RATE is frozen for architectures which is horrible.
We need to fix this somehow
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Steve French [Wed, 6 May 2009 04:16:04 +0000 (04:16 +0000)]
[CIFS] Allow raw ntlmssp code to be enabled with sec=ntlmssp
On mount, "sec=ntlmssp" can now be specified to allow
"rawntlmssp" security to be enabled during
CIFS session establishment/authentication (ntlmssp used to
require specifying krb5 which was counterintuitive).
Linus Torvalds [Wed, 6 May 2009 00:02:05 +0000 (17:02 -0700)]
Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/r128: fix r128 ioremaps to use ioremap_wc.
drm: cleanup properly in drm_get_dev() failure paths
drm: clean the map list before destroying the hash table
drm: remove unreachable code in drm_sysfs.c
drm: add control node checks missing from kms merge
drm/kms: don't try to shortcut drm mode set function
drm/radeon: bump minor version for occlusion queries support
Mel Gorman [Tue, 5 May 2009 15:37:17 +0000 (16:37 +0100)]
Ignore madvise(MADV_WILLNEED) for hugetlbfs-backed regions
madvise(MADV_WILLNEED) forces page cache readahead on a range of memory
backed by a file. The assumption is made that the page required is
order-0 and "normal" page cache.
On hugetlbfs, this assumption is not true and order-0 pages are
allocated and inserted into the hugetlbfs page cache. This leaks
hugetlbfs page reservations and can cause BUGs to trigger related to
corrupted page tables.
This patch causes MADV_WILLNEED to be ignored for hugetlbfs-backed
regions.
Linus Torvalds [Tue, 5 May 2009 19:09:27 +0000 (12:09 -0700)]
Merge branch 'irq/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
Revert "genirq: assert that irq handlers are indeed running in hardirq context"
Linus Torvalds [Tue, 5 May 2009 19:08:02 +0000 (12:08 -0700)]
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: x86, mmiotrace: fix range test
tracing: fix ref count in splice pages
Linus Torvalds [Tue, 5 May 2009 19:07:21 +0000 (12:07 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: show number of core_siblings instead of thread_siblings in /proc/cpuinfo
amd-iommu: fix iommu flag masks
x86: initialize io_bitmap_base on 32bit
x86: gettimeofday() vDSO: fix segfault when tv == NULL
- drivers/xen/events.c did not compile
- xen_setup_hook caused a modpost section warning
- the use of u64 (instead of unsigned long long) together with a %llu
in drivers/xen/balloon.c caused a compiler warning
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Linus Torvalds [Tue, 5 May 2009 15:27:14 +0000 (08:27 -0700)]
Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
i2c-algo-pca: Let PCA9564 recover from unacked data byte (state 0x30)
i2c-algo-bit: Fix timeout test
i2c: Timeouts off by 1
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (30 commits)
e1000: fix virtualization bug
bonding: fix alb mode locking regression
Bluetooth: Fix issue with sysfs handling for connections
usbnet: CDC EEM support (v5)
tcp: Fix tcp_prequeue() to get correct rto_min value
ehea: fix invalid pointer access
ne2k-pci: Do not register device until initialized.
Subject: [PATCH] br2684: restore net_dev initialization
net: Only store high 16 bits of kernel generated filter priorities
virtio_net: Fix function name typo
virtio_net: Cleanup command queue scatterlist usage
bonding: correct the cleanup in bond_create()
virtio: add missing include to virtio_net.h
smsc95xx: add support for LAN9512 and LAN9514
smsc95xx: configure LED outputs
netconsole: take care of NETDEV_UNREGISTER event
xt_socket: checks for the state of nf_conntrack
bonding: bond_slave_info_query() fix
cxgb3: fixing gcc 4.4 compiler warning: suggest parentheses around operand of ‘!’
netfilter: use likely() in xt_info_rdlock_bh()
...
Linus Torvalds [Tue, 5 May 2009 15:25:37 +0000 (08:25 -0700)]
Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Fix setting of oprofile cpu type
powerpc: Update MPC5xxx and Xilinx Virtex maintainer entries
powerpc adjust oprofile_cpu_type version 3
projects / mirror_ubuntu-focal-kernel.git / log