While stressing the kernel with with failing allocations today, I hit the
following chain of events:
alloc_page_buffers():
bh = alloc_buffer_head(GFP_NOFS);
if (!bh)
goto no_grow; <= path taken
grow_dev_page():
bh = alloc_page_buffers(page, size, 0);
if (!bh)
goto failed; <= taken, consequence of the above
and then the failed path BUG()s the kernel.
The failure is inserted a litte bit artificially, but even then, I see no
reason why it should be deemed impossible in a real box.
Even though this is not a condition that we expect to see around every
time, failed allocations are expected to be handled, and BUG() sounds just
too much. As a matter of fact, grow_dev_page() can return NULL just fine
in other circumstances, so I propose we just remove it, then.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The "pgsteal" stat is confusing because it counts both direct reclaim as
well as background reclaim. However, we have "kswapd_steal" which also
counts background reclaim value.
This patch fixes it and also makes it match the existng "pgscan_" stats.
Test:
pgsteal_kswapd_dma32 447623
pgsteal_kswapd_normal 42272677
pgsteal_kswapd_movable 0
pgsteal_direct_dma32 2801
pgsteal_direct_normal 44353270
pgsteal_direct_movable 0
Signed-off-by: Ying Han <yinghan@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Mel Gorman <mel@csn.ul.ie>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
An epoll_ctl(,EPOLL_CTL_ADD,,) operation can return '-ELOOP' to prevent
circular epoll dependencies from being created. However, in that case we
do not properly clear the 'tfile_check_list'. Thus, add a call to
clear_tfile_check_list() for the -ELOOP case.
Signed-off-by: Jason Baron <jbaron@redhat.com>
Reported-by: Yurij M. Plotnikov <Yurij.Plotnikov@oktetlabs.ru>
Cc: Nelson Elhage <nelhage@nelhage.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Tested-by: Alexandra N. Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix a gcc warning (and bug?) introduced in cc9a6c877 ("cpuset: mm: reduce
large amounts of memory barrier related damage v3")
Local variable "page" can be uninitialized if the nodemask from vma policy
does not intersects with nodemask from cpuset. Even if it doesn't happens
it is better to initialize this variable explicitly than to introduce
a kernel oops in a weird corner case.
mm/hugetlb.c: In function `alloc_huge_page':
mm/hugetlb.c:1135:5: warning: `page' may be used uninitialized in this function
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
None of the callsites actually need the page_cgroup descriptor
themselves, so just pass the page and do the look up in there.
We already had two bugs (6568d4a 'mm: memcg: update the correct soft
limit tree during migration' and 'memcg: fix Bad page state after
replace_page_cache') where the passed page and pc were not referring
to the same page frame.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The comments above __alloc_bootmem_node() claim that the code will
first try the allocation using 'goal' and if that fails it will
try again but with the 'goal' requirement dropped.
Unfortunately, this is not what the code does, so fix it to do so.
This is important for nobootmem conversions to architectures such
as sparc where MAX_DMA_ADDRESS is infinity.
On such architectures all of the allocations done by generic spots,
such as the sparse-vmemmap implementation, will pass in:
__pa(MAX_DMA_ADDRESS)
as the goal, and with the limit given as "-1" this will always fail
unless we add the appropriate fallback logic here.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 026cee0086 had the side-effect of dropping the '=' from
the unknown boot arguments that are passed to init as environment
variables. This is because parse_args() puts a NUL in the string
where the '=' was when it passes the "param" and "val" pointers
to the parsing subfunctions. Previously, unknown_bootoption() was
the last parse_args() subfunction to run, and it carefully put back
the '=' character. Now the ignore_unknown_bootoption() is the last
one to run, and it wasn't doing the necessary repair, so the
envp params ended up with the embedded NUL and were no longer
seen as valid environment variables by init.
Tested-by: Woody Suwalski <terraluna977@gmail.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Provide systems that do not support x2apic cluster mode
a mechanism to select x2apic physical mode using the
FADT FORCE_APIC_PHYSICAL_DESTINATION_MODE bit.
Changes from v1: (based on Suresh's comments)
- removed #ifdef CONFIG_ACPI
- removed #include <linux/acpi.h>
Signed-off-by: Greg Pearson <greg.pearson@hp.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/r/1335313436-32020-1-git-send-email-greg.pearson@hp.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The second parameter to intel_scu_notifier_post is a void *, not
an integer.
This quiets the sparse noise:
arch/x86/platform/mrst/mrst.c:808:48: warning: Using plain integer as NULL pointer
arch/x86/platform/mrst/mrst.c:817:43: warning: Using plain integer as NULL pointer
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Link: http://lkml.kernel.org/r/201204241500.53685.hartleys@visionengravers.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
way the code checks for already disabled indices.
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Merge tag 'l3-fix-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp into x86/urgent
A small L3 cache index disable fix from Srivatsa Bhat which unifies the
way the code checks for already disabled indices.
( Pulling it into v3.4 despite the v3.5 tag - the fix is small and we better
keep the same code across kernel versions for such user facing interfaces. )
Signed-off-by: Ingo Molnar <mingo@kernel.org>
When a client calls pl08x_control with DMA_TERMINATE_ALL, it is correct
to terminate and release the phy channel currently in use (if one is in use),
but the phychan_hold counter must also be reset (otherwise it could get
trapped in an unbalanced state).
Signed-off-by: Davide Ciminaghi <ciminaghi@gnudd.com>
Reviewed-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Move a couple of tests and do a minor refactor to avoid:
drivers/dma/pl330.c: In function 'pl330_probe':
drivers/dma/pl330.c:2929:215: warning: comparison of distinct pointer types lacks a cast [enabled by default]
drivers/dma/pl330.c: In function 'pl330_tasklet':
drivers/dma/pl330.c:2250:8: warning: 'pch' may be used uninitialized in this function [-Wuninitialized]
drivers/dma/pl330.c:2228:25: note: 'pch' was declared here
drivers/dma/pl330.c:2277:130: warning: 'pch' may be used uninitialized in this function [-Wuninitialized]
drivers/dma/pl330.c:2260:25: note: 'pch' was declared here
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Commit 6e8201f57c "mmc: core: add the capability for broken voltage"
introduced a new quirk to indicate that MMC core should ignore voltage
change errors reported by the regulators core. This is required to get
SDHCI working on UniversalC210, NURI and GONI boards again after commit
ceb6143b2d ("mmc: sdhci: fix vmmc handling").
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
If the call to mlx4_MAD_IFC() fails in ib_link_query_port() we will
currently do 'return err;' which will leak 'in_mad' and 'out_mad'. We
should instead do 'goto out;' where we'll properly free the memory we
previously allocated.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Commit 0b30704304 ("IB/mad: Return error response for unsupported
MADs") does not failed MADs (eg those that return
IB_MAD_RESULT_FAILURE) properly -- these MADs should be silently
discarded. (We should not force the lower-layer drivers to return
SUCCESS | CONSUMED in this case, since the MAD is NOT successful).
Unsupported MADs are not failures -- they return SUCCESS, but with an
"unsupported error" status value inside the response MAD.
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Commit 0b30704304 ("IB/mad: Return error response for unsupported
MADs") does not handle directed-route MADs properly -- it fails to set
the 'D' bit in the response MAD status field. This is a problem for
SmInfo MADs when the receiver does not have an SM running.
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>
The dependency on hotplug memory was removed, so
remove the dependency in the Kconfig.
Signed-off-by: Andre Heider <a.heider@gmail.com>
Signed-off-by: Geoff Levand <geoff@infradead.org>
Real mode memory can be limited and runs out quickly as memory is allocated
during kernel startup. Having the highmem available sooner fixes this.
This change simplifies the memory management code by converting from hotplug
memory to logical memory blocks.
Signed-off-by: Hector Martin <hector@marcansoft.com>
Signed-off-by: Andre Heider <a.heider@gmail.com>
Signed-off-by: Geoff Levand <geoff@infradead.org>
Use any preallocated highmem region setup by the bootloader.
This implementation only checks for the existance of a single
region at region_index=0.
This feature allows the bootloader to preallocate highmem
regions and pass the region locations to the kernel through
the repository. Preallocated regions can be used to hold the
initrd or other large data. If no region info exists, the
kernel retains the old behavior and attempts to allocate the
highmem region itself.
Based on Hector Martin's patch "Get lv1 high memory region from
devtree".
CC: Hector Martin <hector@marcansoft.com>
Signed-off-by: Andre Heider <a.heider@gmail.com>
CC: Nathan Whitehorn <nwhitehorn@freebsd.org>
Signed-off-by: Geoff Levand <geoff@infradead.org>
Add repository helper routines to read highmem region info.
Bootloaders that preallocate highmem regions must place the
region info into the repository at these well known nodes.
These routines allow second stage kernles to read the region
info from those nodes.
Signed-off-by: Andre Heider <a.heider@gmail.com>
CC: Nathan Whitehorn <nwhitehorn@freebsd.org>
Signed-off-by: Geoff Levand <geoff@infradead.org>
Add routines to allow Linux based bootloaders to create and/or
modify highmem region info in the PS3 system repository where
it can be retrived by later boot stages.
Signed-off-by: Geoff Levand <geoff@infradead.org>
Add a new config option CONFIG_PS3_REPOSITORY_WRITE that
conditionally builds in support to create, write and delete
nodes in the PS3 system repository.
This support will allow Linux based bootloaders to manage data
in the system repository for use by later boot stages,
Signed-off-by: Geoff Levand <geoff@infradead.org>
Hibernation regression fix, since 3.2.
Calculate the number of required free pages based on non-high memory
pages only, because that is where the buffers will come from.
Commit 081a9d043c introduced a new buffer
page allocation logic during hibernation, in order to improve the
performance. The amount of pages allocated was calculated based on total
amount of pages available, although only non-high memory pages are
usable for this purpose. This caused hibernation code to attempt to over
allocate pages on platforms that have high memory, which led to hangs.
Signed-off-by: Bojan Smojver <bojan@rexursive.com>
Signed-off-by: Rafael J. Wysocki <rjw@suse.de>
This patch (as1545) fixes a problem affecting several ASUS computers:
The machine crashes or corrupts memory when going into suspend if the
ehci-hcd driver is bound to any controllers. Users have been forced
to unbind or unload ehci-hcd before putting their systems to sleep.
After extensive testing, it was determined that the machines don't
like going into suspend when any EHCI controllers are in the PCI D3
power state. Presumably this is a firmware bug, but there's nothing
we can do about it except to avoid putting the controllers in D3
during system sleep.
The patch adds a new flag to indicate whether the problem is present,
and avoids changing the controller's power state if the flag is set.
Runtime suspend is unaffected; this matters only for system suspend.
However as a side effect, the controller will not respond to remote
wakeup requests while the system is asleep. Hence USB wakeup is not
functional -- but of course, this is already true in the current state
of affairs.
This fixes Bugzilla #42728.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Andrey Rahmatullin <wrar@wrar.name>
Tested-by: Oleksij Rempel (fishor) <bug-track@fisher-privat.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The field is used to pass the UVC request data length, but can also be
used to signal an error when setting it to a negative value. Switch from
unsigned int to __s32.
Reported-by: Fernandez Gonzalo <gfernandez@copreci.es>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixed following compile time error.
arch/arm/mach-exynos/common.c: In function 'exynos5_init_irq':
arch/arm/mach-exynos/common.c:539:2: error: implicit declaration of function 'of_irq_init'
arch/arm/mach-exynos/common.c:539:14: error: 'exynos4_dt_irq_match' undeclared (first use in this function)
arch/arm/mach-exynos/common.c:539:14: note: each undeclared identifier is reported only once for each function it appears in
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Should be EXYNOS4_IRQ_DWMCI instead of IRQ_DWMCI,
and use DEFINE_RES_{MEM,IRQ}.
Reported-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
warning: (CPU_S3C2440 && CPU_S3C2442) selects S3C2410_PM which has unmet direct dependencies (ARCH_S3C24XX && CPU_S3C2410)
warning: (CPU_S3C2440 && CPU_S3C2442) selects S3C2410_PM which has unmet direct dependencies (ARCH_S3C24XX && CPU_S3C2410)
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This is needed to fix mini2440_defconfig after the platform
files have been moved around.
arm-none-linux-gnueabi-ld: no machine record defined
arm-none-linux-gnueabi-ld: no machine record defined
arm-none-linux-gnueabi-ld: no machine record defined
make: *** [.tmp_vmlinux1] Error 1
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This patch fixes the following build failures:
drivers/staging/octeon/ethernet.c: In function 'cvm_oct_cleanup_module':
drivers/staging/octeon/ethernet.c:799:2: error: implicit declaration of function 'free_irq'
drivers/staging/octeon/ethernet-rx.c: In function 'cvm_oct_no_more_work':
drivers/staging/octeon/ethernet-rx.c:119:3: error: implicit declaration of function 'enable_irq'
drivers/staging/octeon/ethernet-rx.c: In function 'cvm_oct_do_interrupt':
drivers/staging/octeon/ethernet-rx.c:136:2: error: implicit declaration of function 'disable_irq_nosync'
drivers/staging/octeon/ethernet-rx.c: In function 'cvm_oct_rx_initialize':
drivers/staging/octeon/ethernet-rx.c:532:2: error: implicit declaration of function 'request_irq'
drivers/staging/octeon/ethernet-tx.c: In function 'cvm_oct_tx_initialize':
drivers/staging/octeon/ethernet-tx.c:712:2: error: implicit declaration of function 'request_irq'
drivers/staging/octeon/ethernet-tx.c: In function 'cvm_oct_tx_shutdown':
drivers/staging/octeon/ethernet-tx.c:723:2: error: implicit declaration of function 'free_irq'
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ZCACHE is a boolean in the Kconfig. When selected, it
should require that CRYPTO be builtin (=y).
Currently, ZCACHE=y and CRYPTO=m is a valid configuration
when it should not be.
This patch changes the zcache Kconfig to enforce this
dependency.
Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Instead now use ioremap. This is needed for 3.4 since this change
emerged in mainline during one of the previous rc cycles.
These solves the following compilation breaks:
drivers/staging/tidspbridge/core/tiomap3430.c:
In function ‘bridge_brd_start’:
drivers/staging/tidspbridge/core/tiomap3430.c:425:4:
error: implicit declaration of function ‘OMAP2_L4_IO_ADDRESS’
drivers/staging/tidspbridge/core/wdt.c: In function ‘dsp_wdt_init’:
drivers/staging/tidspbridge/core/wdt.c:56:2:
error: implicit declaration of function ‘OMAP2_L4_IO_ADDRESS’
For control registers a new function needs to be defined so we
can get rid of a layer violation, but that approach must be queued
for the next merge window.
As seen in:
http://www.arm.linux.org.uk/developer/build/
platform: omap4430-sdp build: uImage
config: randconfig version: 3.4.0-rc3
start time: Apr 20 2012 01:07
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Omar Ramirez Luna <omar.ramirez@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cifs_show_options uses the wrong conversion specifier for uid, gid,
rsize & wsize. Correct this to %u to match it to the variable type
'unsigned integer'.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Show backupuid/backupgid in /proc/mounts for cifs shares mounted with
the backupuid/backupgid feature.
Also consolidate the two separate checks for
pvolume_info->backupuid_specified into a single if condition in
cifs_setup_cifs_sb().
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This patch instructs DLM to prevent an "in place" conversion, where the
lock just stays on the granted queue, and instead forces the conversion to
the back of the convert queue. This is done on upward conversions only.
This is useful in cases where, for example, a lock is frequently needed in
PR on one node, but another node needs it temporarily in EX to update it.
This may happen, for example, when the rindex is being updated by gfs2_grow.
The gfs2_grow needs to have the lock in EX, but the other nodes need to
re-read it to retrieve the updates. The glock is already granted in PR on
the non-growing nodes, so this prevents them from continually re-granting
the lock in PR, and forces the EX from gfs2_grow to go through.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
These are two low-risk bug fixes for ext4, fixing a compile warning
and a potential deadlock.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bug fixes from Ted Ts'o:
"These are two low-risk bug fixes for ext4, fixing a compile warning
and a potential deadlock."
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
super.c: unused variable warning without CONFIG_QUOTA
jbd2: use GFP_NOFS for blkdev_issue_flush
Pull Hexagon fixes from Richard Kuo:
"It's mostly compile fixes and the Hexagon portion of a CPU hotplug
patch set."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel:
hexagon: add missing cpu.h include
hexagon/CPU hotplug: Add missing call to notify_cpu_starting()
hexagon: use renamed tick_nohz_idle_* functions
Hexagon: misc compile warning/error cleanup due to missing headers
Glauber Costa