This appears to be a copy/paste error. Update the description to
reflect extra rbtree debug and checks for the config option instead of
duplicating CONFIG_DEBUG_VM.
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Vrabel identified a regression when using automatic NUMA balancing
under Xen whereby page table entries were getting corrupted due to the
use of native PTE operations. Quoting him
Xen PV guest page tables require that their entries use machine
addresses if the preset bit (_PAGE_PRESENT) is set, and (for
successful migration) non-present PTEs must use pseudo-physical
addresses. This is because on migration MFNs in present PTEs are
translated to PFNs (canonicalised) so they may be translated back
to the new MFN in the destination domain (uncanonicalised).
pte_mknonnuma(), pmd_mknonnuma(), pte_mknuma() and pmd_mknuma()
set and clear the _PAGE_PRESENT bit using pte_set_flags(),
pte_clear_flags(), etc.
In a Xen PV guest, these functions must translate MFNs to PFNs
when clearing _PAGE_PRESENT and translate PFNs to MFNs when setting
_PAGE_PRESENT.
His suggested fix converted p[te|md]_[set|clear]_flags to using
paravirt-friendly ops but this is overkill. He suggested an alternative
of using p[te|md]_modify in the NUMA page table operations but this is
does more work than necessary and would require looking up a VMA for
protections.
This patch modifies the NUMA page table operations to use paravirt
friendly operations to set/clear the flags of interest. Unfortunately
this will take a performance hit when updating the PTEs on
CONFIG_PARAVIRT but I do not see a way around it that does not break
Xen.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Tested-by: David Vrabel <david.vrabel@citrix.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Noonan <steven@uplinklabs.net>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The lkdtm module performs tests against executable memory ranges, so it
needs to flush the icache for proper behaviors. Other architectures
already export this, so do the same for MIPS.
[akpm@linux-foundation.org: relocate export sites]
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Sanjay Lal <sanjayl@kymasys.com>
Cc: John Crispin <blogic@openwrt.org>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In document numa_memory_policy.txt, the following examples for flag
MPOL_F_RELATIVE_NODES are incorrect.
For example, consider a task that is attached to a cpuset with
mems 2-5 that sets an Interleave policy over the same set with
MPOL_F_RELATIVE_NODES. If the cpuset's mems change to 3-7, the
interleave now occurs over nodes 3,5-6. If the cpuset's mems
then change to 0,2-3,5, then the interleave occurs over nodes
0,3,5.
According to the comment of the patch adding flag MPOL_F_RELATIVE_NODES,
the nodemasks the user specifies should be considered relative to the
current task's mems_allowed.
(https://lkml.org/lkml/2008/2/29/428)
And according to numa_memory_policy.txt, if the user's nodemask includes
nodes that are outside the range of the new set of allowed nodes, then
the remap wraps around to the beginning of the nodemask and, if not
already set, sets the node in the mempolicy nodemask.
So in the example, if the user specifies 2-5, for a task whose
mems_allowed is 3-7, the nodemasks should be remapped the third, fourth,
fifth, sixth node in mems_allowed. like the following:
mems_allowed: 3 4 5 6 7
relative index: 0 1 2 3 4
5
So the nodemasks should be remapped to 3,5-7, but not 3,5-6.
And for a task whose mems_allowed is 0,2-3,5, the nodemasks should be
remapped to 0,2-3,5, but not 0,3,5.
mems_allowed: 0 2 3 5
relative index: 0 1 2 3
4 5
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
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>
Pull PCI updates from Bjorn Helgaas:
"These are fixes for a powerpc NULL pointer dereference, an OF
interrupt mapping issue on some of the new host bridges, and a
DesignWare iATU issue.
Host bridge drivers
- Fix OF interrupt mapping for DesignWare, R-Car, Tegra (Lucas Stach)
- Fix DesignWare iATU programming (Mohit Kumar)
Miscellaneous
- Fix powerpc NULL dereference from list_for_each_entry() update (Mike Qiu)"
* tag 'pci-v3.15-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: tegra: Use new OF interrupt mapping when possible
PCI: rcar: Use new OF interrupt mapping when possible
PCI: designware: Use new OF interrupt mapping when possible
PCI: designware: Fix iATU programming for cfg1, io and mem viewport
PCI: designware: Fix comment for setting number of lanes
powerpc/PCI: Fix NULL dereference in sys_pciconfig_iobase() list traversal
Pull HID fixes from Jiri Kosina:
- fix for merge window mismerge in hid-sony, from Frank Praznik
- fix for Surface Type/Touch Cover 2 device, from Benjamin Tissoires
- quirk for ThinkPad Helix sensor hub from Stephen Chandler Paul
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: core: do not scan constant input report
Revert "HID: microsoft: Add ID's for Surface Type/Touch Cover 2"
HID: sensor-hub: add sensor hub quirk for ThinkPad Helix
HID: sony: Fix cancel_work_sync mismerge
Pull sound fixes from Takashi Iwai:
"Just a copule of HD-audio device/codec-specific quirks, and a trivial
replacement of udelay() with mdelay() in the old es18xx driver code.
All should be safe to apply"
* tag 'sound-3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Add headset Mic support for Dell machine
ALSA: hda - add headset mic detect quirk for a Dell laptop
ALSA: es18xx driver should use udelay error
ALSA: hda/realtek - Add support of ALC288 codec
Pull devicetree fixes from Rob Herring:
- fix error handling in of_update_property
- fix section mismatch warnings in __reserved_mem_check_root
- add empty of_find_node_by_path for !OF builds
- add various missing binding documentation
* tag 'dt-fixes-for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of: add empty of_find_node_by_path() for !OF
of: Clean up of_update_property
DT: add vendor prefix for EBV Elektronik
of: Fix the section mismatch warnings.
of: Add vendor prefix for Digi International Inc.
DT: I2C: Add trivial bindings used by kirkwood boards
DT: Vendor: Add prefixes used by Kirkwood devices
DT: bindings: add missing Marvell Kirkwood SoC documentation
dt-bindings: add vendor-prefix for Newhaven Display
of: add vendor prefix for I2SE GmbH
of: add vendor prefix for ISEE 2007 S.L.
Pull xfs bug fixes from Dave Chinner:
"The fixes are for data corruption issues, memory corruption and
regressions for changes merged in -rc1.
Data corruption fixes:
- fix a bunch of delayed allocation state mismatches
- fix collapse/zero range bugs
- fix a direct IO block mapping bug @ EOF
Other fixes:
- fix a use after free on metadata IO error
- fix a use after free on IO error during unmount
- fix an incorrect error sign on direct IO write errors
- add missing O_TMPFILE inode security context initialisation"
* tag 'xfs-for-linus-3.15-rc2' of git://oss.sgi.com/xfs/xfs:
xfs: fix tmpfile/selinux deadlock and initialize security
xfs: fix buffer use after free on IO error
xfs: wrong error sign conversion during failed DIO writes
xfs: unmount does not wait for shutdown during unmount
xfs: collapse range is delalloc challenged
xfs: don't map ranges that span EOF for direct IO
xfs: zeroing space needs to punch delalloc blocks
xfs: xfs_vm_write_end truncates too much on failure
xfs: write failure beyond EOF truncates too much data
xfs: kill buffers over failed write ranges properly
Pull tracing fixes from Steven Rostedt:
"This contains two fixes.
The first is to remove a duplication of creating debugfs files that
already exist and causes an error report to be printed due to the
failure of the second creation.
The second is a memory leak fix that was introduced in 3.14"
* tag 'trace-fixes-v3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/uprobes: Fix uprobe_cpu_buffer memory leak
tracing: Do not try to recreated toplevel set_ftrace_* files
Add an empty version of of_find_node_by_path().
This fixes following build error for asoc tree:
sound/soc/fsl/fsl_ssi.c: In function 'fsl_ssi_probe':
sound/soc/fsl/fsl_ssi.c:1471:2: error: implicit declaration of function 'of_find_node_by_path' [-Werror=implicit-function-declaration]
sprop = of_get_property(of_find_node_by_path("/"), "compatible", NULL);
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Rob Herring <robh@kernel.org>
Pull timer fixes from Thomas Gleixner:
"Viresh unearthed the following three hickups in the timer/timekeeping
code:
- Negated check for the result of a clock event selection
- A missing early exit in the jiffies update path which causes
update_wall_time to be called for nothing causing lock contention
and wasted cycles in the timer interrupt
- Checking a variable in the NOHZ code enable code for true which can
only be set by that very code after the check succeeds. That
results in a rock solid runtime disablement of that feature"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick-sched: Check tick_nohz_enabled in tick_nohz_switch_to_nohz()
tick-sched: Don't call update_wall_time() when delta is lesser than tick_period
tick-common: Fix wrong check in tick_check_replacement()
Pull parisc updates from Helge Deller:
"There are two major changes in this patchset:
The major fix is that the epoll_pwait() syscall for 32bit userspace
was not using the compat wrapper on a 64bit kernel.
Secondly we changed the value of SHMLBA from 4MB to PAGE_SIZE to
reflect that we can actually mmap to any multiple of PAGE_SIZE. The
only thing which needs care is that shared mmaps need to be mapped at
the same offset inside the 4MB cache window"
* 'parisc-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: fix epoll_pwait syscall on compat kernel
parisc: change value of SHMLBA from 0x00400000 to PAGE_SIZE
parisc: Replace __get_cpu_var uses for address calculation
Merge ipmi fixes from Corey Minyard:
"Things collected since last kernel release.
Some of these are pretty important. The first three are bug fixes.
The next two are to hopefully make everyone happy about allowing
ACPI to be on all the time and not have IPMI have an effect on the
system when not in use. The last is a little cleanup"
* emailed patches from Corey Minyard <cminyard@mvista.com>:
ipmi: boolify some things
ipmi: Turn off all activity on an idle ipmi interface
ipmi: Turn off default probing of interfaces
ipmi: Reset the KCS timeout when starting error recovery
ipmi: Fix a race restarting the timer
Char: ipmi_bt_sm, fix infinite loop
The IPMI driver would wake up periodically looking for events and
watchdog pretimeouts. If there is nothing waiting for these events,
it's really kind of pointless to be checking for them. So modify the
driver so the message handler can pass down if it needs the lower layer
to be waiting for these. Modify the system interface lower layer to
turn off all timer and thread activity if the upper layer doesn't need
anything and it is not currently handling messages. And modify the
message handler to not restart the timer if its timer is not needed.
The timers and kthread will still be enabled if:
- the SI interface is handling a message.
- a user has enabled watching for events.
- the IPMI watchdog timer is in use (since it uses pretimeouts).
- the message handler is waiting on a remote response.
- a user has registered to receive commands.
This mostly affects interfaces without interrupts. Interfaces with
interrupts already don't use CPU in the system interface when the
interface is idle.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The default probing can cause problems with some system, slow booting,
extra CPU usages, etc. Turn it off by default and give a config option
to enable it.
From: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Davidlohr Bueso
Mel Gorman
Kees Cook
Mizuma, Masayoshi
Peter Zijlstra
Viresh Kumar
Tang Chen
Mike Qiu
Andrew Morton
Peter Foley
Christoph Lameter
Linus Torvalds
Alexander Shiyan
Corey Minyard