19 Nov, 2016
1 commit
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Pull ACPI fixes from Rafael Wysocki:
"They fix an ACPI thermal management regression introduced by a recent
FADT handling cleanup, an ACPI tools build issue introduced by a
recent ACPICA commit and a PCC mailbox initialization bug causing
lockdep to complain loudly.Specifics:
- Revert a recent ACPICA cleanup that attempted to get rid of all
FADT version 2 legacy, but broke ACPI thermal management on at
least one system (Rafael Wysocki).- Fix cross-compiled builds of ACPI tools that stopped working after
a recent cleanup related to the handling of header files in ACPICA
(Lv Zheng).- Fix a locking issue in the PCC channel initialization code that
invokes devm_request_irq() under a spinlock (among other things)
and causes lockdep to complain (Hoan Tran)"* tag 'acpi-4.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
tools/power/acpi: Remove direct kernel source include reference
mailbox: PCC: Fix lockdep warning when request PCC channel
Revert "ACPICA: FADT support cleanup"
17 Nov, 2016
1 commit
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Avoid breaking cross-compiled ACPI tools builds by rearranging the
handling of kernel header files.This patch also contains OUTPUT/srctree cleanups in order to make above fix
working for various build environments.Fixes: e323c02dee59 (ACPICA: MSVC9: Fix inclusion order issue)
Reported-and-tested-by: Yisheng Xie
Reported-by: Andy Shevchenko
Signed-off-by: Lv Zheng
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki
15 Nov, 2016
1 commit
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Pull perf fixes from Ingo Molnar:
"An uncore PMU driver hardware enablement change for Intel SkyLake
uncore PMUs (Skylake Y, U, H and S platforms), plus a number of
tooling fixes for the histogram handling/displaying code"* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel/uncore: Add more Intel uncore IMC PCI IDs for SkyLake
perf hists: Fix column length on --hierarchy
perf hists browser: Fix column indentation on --hierarchy
perf hists browser: Show folded sign properly on --hierarchy
perf hists browser: Fix indentation of folded sign on --hierarchy
perf hist browser: Fix hierarchy column counts
12 Nov, 2016
2 commits
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…g/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes for perf {top,report} --hierarchy, from Arnaldo Carvalho de Melo:
- These are fixes for the --hierarchy view of perf top and report, fixing
output oddities, mostly related to scrolling. (Namhyung Kim)Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org> -
* pm-tools-fixes:
cpupower: Correct return type of cpu_power_is_cpu_online() in cpufreq-set* pm-sleep-fixes:
PM / sleep: don't suspend parent when async child suspend_{noirq, late} fails
PM / sleep: fix device reference leak in test_suspend
09 Nov, 2016
5 commits
-
Markus reported that there's a weird behavior on perf top --hierarchy
regarding the column length.Looking at the code, I found a dubious code which affects the symptoms.
When --hierarchy option is used, the last column length might be
inaccurate since it skips to update the length on leaf entries.I cannot remember why it did and looks like a leftover from previous
version during the development.Anyway, updating the column length often is not harmful. So let's move
the code out.Reported-and-Tested-by: Markus Trippelsdorf
Signed-off-by: Namhyung Kim
Cc: Jiri Olsa
Cc: Peter Zijlstra
Fixes: 1a3906a7e6b9 ("perf hists: Resort hist entries with hierarchy")
Link: http://lkml.kernel.org/r/20161108130833.9263-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
When horizontall scrolling is used in hierarchy mode, the the right most
column has unnecessary indentation. Actually it's needed only if some
of left (overhead) columns were shown.Signed-off-by: Namhyung Kim
Tested-by: Arnaldo Carvalho de Melo
Tested-by: Markus Trippelsdorf
Cc: Jiri Olsa
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20161108130833.9263-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
When horizontal scrolling is used in hierarchy mode, the folded signed
disappears at the right most column.Committer note:
To test it, run 'perf top --hierarchy, see the '+' symbol at the first
column, then press the right arrow key, the '+' symbol will disappear,
this patch fixes that.Signed-off-by: Namhyung Kim
Tested-by: Arnaldo Carvalho de Melo
Tested-by: Markus Trippelsdorf
Cc: Jiri Olsa
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20161108130833.9263-3-namhyung@kernel.org
[ Move 'width -= 2' invariant to right after the if/else ]
Signed-off-by: Arnaldo Carvalho de Melo -
It should indent 2 spaces for folded sign and a whitespace.
Signed-off-by: Namhyung Kim
Tested-by: Markus Trippelsdorf
Cc: Jiri Olsa
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20161108130833.9263-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The perf report/top on TUI supports horizontal scrolling using LEFT and
RIGHT keys.But it calculate the number of columns incorrectly when hierarchy mode
is enabled so that keep pressing RIGHT key can make the output
disappeared.In the hierarchy mode, all sort keys are collapsed into a single column,
so it needs to be applied when calculating column numbers.Reported-and-Tested-by: Markus Trippelsdorf
Signed-off-by: Namhyung Kim
Tested-by: Arnaldo Carvalho de Melo
Cc: Jiri Olsa
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20161024162110.17918-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
01 Nov, 2016
1 commit
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When converting to a shared library in ac5a181d065d ("cpupower: Add
cpuidle parts into library"), cpu_freq_cpu_exists() was converted to
cpupower_is_cpu_online(). cpu_req_cpu_exists() returned 0 on success and
-ENOSYS on failure whereas cpupower_is_cpu_online returns 1 on success.
Check for the correct return value in cpufreq-set.Link: https://bugzilla.redhat.com/show_bug.cgi?id=1374212
Fixes: ac5a181d065d (cpupower: Add cpuidle parts into library)
Reported-by: Julian Seward
Signed-off-by: Laura Abbott
Acked-by: Thomas Renninger
Cc: 4.7+ # 4.7+
Signed-off-by: Rafael J. Wysocki
31 Oct, 2016
3 commits
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Updating the event index has a memory barrier and causes more work
on the other side to actually signal the event. It is unnecessary
if a new buffer has already appeared on the ring, so poll once before
doing the update.The effect of this on the 0.9 ring implementation is pretty much
invisible, but on the new-style ring it provides a consistent 3%
performance improvement.Signed-off-by: Paolo Bonzini
Signed-off-by: Michael S. Tsirkin -
Provide new primitives used_empty/avail_empty and
build poll_avail/poll_used on top of it.Signed-off-by: Paolo Bonzini
Signed-off-by: Michael S. Tsirkin -
By using -flto and -fwhole-program, all functions from the ring implementation
can be treated as static and possibly inlined. Force this to happen through
the GCC flatten attribute.Signed-off-by: Paolo Bonzini
Signed-off-by: Michael S. Tsirkin
27 Oct, 2016
1 commit
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The following commit:
3732710ff6f2 ("objtool: Improve rare switch jump table pattern detection")
... improved objtool's ability to detect GCC switch statement jump
tables for GCC 6. However the check to allow short jumps with the
scanned range of instructions wasn't quite right. The pattern detection
should allow jumps to the indirect jump instruction itself.This fixes the following warning:
drivers/infiniband/sw/rxe/rxe_comp.o: warning: objtool: rxe_completer()+0x315: sibling call from callable instruction with changed frame pointer
Reported-by: Arnd Bergmann
Signed-off-by: Josh Poimboeuf
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Fixes: 3732710ff6f2 ("objtool: Improve rare switch jump table pattern detection")
Link: http://lkml.kernel.org/r/20161026153408.2rifnw7bvoc5sex7@treble
Signed-off-by: Ingo Molnar
19 Oct, 2016
2 commits
-
AVX512_4VNNIW - Vector instructions for deep learning enhanced word
variable precision.
AVX512_4FMAPS - Vector instructions for deep learning floating-point
single precision.These new instructions are to be used in future Intel Xeon & Xeon Phi
processors. The bits 2&3 of CPUID[level:0x07, EDX] inform that new
instructions are supported by a processor.The spec can be found in the Intel Software Developer Manual (SDM) or in
the Instruction Set Extensions Programming Reference (ISE).Define new feature flags to enumerate the new instructions in /proc/cpuinfo
accordingly to CPUID bits and add the required xsave extensions which are
required for proper operation.Signed-off-by: Piotr Luc
Cc: Denys Vlasenko
Cc: Peter Zijlstra
Cc: Brian Gerst
Cc: Dave Hansen
Cc: Borislav Petkov
Cc: Andy Lutomirski
Cc: Josh Poimboeuf
Cc: Linus Torvalds
Link: http://lkml.kernel.org/r/20161018150111.29926-1-piotr.luc@intel.com
Signed-off-by: Thomas Gleixner -
Pull perf fixes from Ingo Molnar:
"Four tooling fixes, two kprobes KASAN related fixes and an x86 PMU
driver fix/cleanup"* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf jit: Fix build issue on Ubuntu
perf jevents: Handle events including .c and .o
perf/x86/intel: Remove an inconsistent NULL check
kprobes: Unpoison stack in jprobe_return() for KASAN
kprobes: Avoid false KASAN reports during stack copy
perf header: Set nr_numa_nodes only when we parsed all the data
perf top: Fix refreshing hierarchy entries on TUI
18 Oct, 2016
1 commit
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Pull misc fixes from Ingo Molnar:
"A CPU hotplug debuggability fix and three objtool false positive
warnings fixes for new GCC6 code generation patterns"* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu/hotplug: Use distinct name for cpu_hotplug.dep_map
objtool: Skip all "unreachable instruction" warnings for gcov kernels
objtool: Improve rare switch jump table pattern detection
objtool: Support '-mtune=atom' stack frame setup instruction
17 Oct, 2016
3 commits
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…/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
- Fix handling of NUMA nodes in perf.data files (Jiri Olsa)
- Fix scrolling when refreshing 'perf top --tui --hierarchy' entries (Namhyung Kim)
- Fix building of JIT support on Ubuntu 16.04 (Anton Blanchard)
- Fix handling of events including .c and .o, that were being treated as
BPF scripts instead of vendor ones (Wang Nan)Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org> -
When building on Ubuntu 16.04, I get the following error:
Makefile:49: *** the openjdk development package appears to me missing, install and try again. Stop.
The problem is that update-java-alternatives has multiple spaces between
fields, and cut treats each space as a new delimiter:java-1.8.0-openjdk-ppc64el 1081 /usr/lib/jvm/java-1.8.0-openjdk-ppc64el
Fix this by using awk, which handles this fine.
Signed-off-by: Anton Blanchard
Reviewed-by: Stephane Eranian
Cc: Alexander Shishkin
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1476325243-15788-1-git-send-email-anton@ozlabs.org
Signed-off-by: Arnaldo Carvalho de Melo -
This patch helps with Sukadev's vendor event tree where such events can happen.
>From Andi Kleen:
Any event including a .c/.o/.bpf currently triggers BPF compilation or loading
and then an error. This can happen for some Intel vendor events, which cannot
be used.This patch fixes this problem by forbidding BPF file patch containing '{', '}'
and ',', make sure flex consumes the leading '{', instead of matching it using
a BPF file path.Tested result:
$ perf stat -e '{unc_p_clockticks,unc_p_power_state_occupancy.cores_c0}' -a -I 1000
invalid or unsupported event: '{unc_p_clockticks,unc_p_power_state_occupancy.cores_c0}'
Run 'perf list' for a list of valid events
(as expected, interperted as event)$ perf stat -e 'aaa.c' -a -I 1000
ERROR: problems with path aaa.c: No such file or directory
(as expected, interpreted as BPF source)$ perf stat -e 'aaa.ccc' -a -I 1000
invalid or unsupported event: 'aaa.ccc'
(as expected, interpreted as event)$ perf stat -e '{aaa.c}' -a -I 1000
ERROR: problems with path aaa.c: No such file or directory
event syntax error: '{aaa.c}'
(as expected, interpreted as BPF source)$ perf stat -e '{cycles,aaa.c}' -a -I 1000
ERROR: problems with path aaa.c: No such file or directory
event syntax error: '{cycles,aaa.c}'
(as expected, interpreted as BPF source)Signed-off-by: Wang Nan
Tested-by: Arnaldo Carvalho de Melo
Reported-by: Andi Kleen
Cc: Jiri Olsa
Cc: Sukadev Bhattiprolu
Cc: Zefan Li
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1475900185-37967-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo
16 Oct, 2016
2 commits
-
Recently objtool has started reporting a few "unreachable instruction"
warnings when CONFIG_GCOV is enabled for newer versions of GCC. Usually
this warning means there's some new control flow that objtool doesn't
understand. But in this case, objtool is correct and the instructions
really are inaccessible. It's an annoying quirk of gcov, but it's
harmless, so it's ok to just silence the warnings.With older versions of GCC, it was relatively easy to detect
gcov-specific instructions and to skip any unreachable warnings produced
by them. But GCC 6 has gotten craftier.Instead of continuing to play whack-a-mole with gcov, just use a bigger,
more permanent hammer and disable unreachable warnings for the whole
file when gcov is enabled. This is fine to do because a) unreachable
warnings are usually of questionable value; and b) gcov isn't used for
production kernels and we can relax the checks a bit there.Reported-by: kbuild test robot
Signed-off-by: Josh Poimboeuf
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Borislav Petkov
Cc: Brian Gerst
Cc: Denys Vlasenko
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/38d5c87d61d9cd46486dd2c86f46603dff0df86f.1476393584.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar -
GCC 6 added a new switch statement jump table optimization which makes
objtool's life harder. It looks like:mov [rodata addr],%reg1
... some instructions ...
jmpq *(%reg1,%reg2,8)The optimization is quite rare, but objtool still needs to be able to
identify the pattern so that it can follow all possible control flow
paths related to the switch statement.In order to detect the pattern, objtool starts from the indirect jump
and scans backwards through the function until it finds the first
instruction in the pattern. If it encounters an unconditional jump
along the way, it stops and considers the pattern to be not found.As it turns out, unconditional jumps can happen, as long as they are
small forward jumps within the range being scanned.This fixes the following warnings:
drivers/infiniband/sw/rxe/rxe_comp.o: warning: objtool: rxe_completer()+0x2f4: sibling call from callable instruction with changed frame pointer
drivers/infiniband/sw/rxe/rxe_resp.o: warning: objtool: rxe_responder()+0x10f: sibling call from callable instruction with changed frame pointerReported-by: Arnd Bergmann
Signed-off-by: Josh Poimboeuf
Cc: Andy Lutomirski
Cc: Borislav Petkov
Cc: Brian Gerst
Cc: Denys Vlasenko
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/8a9ed68ae1780e8d3963e4ee13f2f257fe3a3c33.1476393584.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar
15 Oct, 2016
2 commits
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…/kernel/git/shuah/linux-kselftest
Pull kselftest updates from Shuah Khan:
"This update consists of:- Fixes and improvements to existing tests
- Moving code from Documentation to selftests, samples, and tools:
* Moves dnotify_test, prctl, ptp, vDSO, ia64, watchdog, and
networking tests from Documentation to selftests.* Moves mic/mpssd, misc-devices/mei, timers, watchdog, auxdisplay,
and blackfin examples from Documentation to samples.* Moves accounting, laptops/dslm, and pcmcia/crc32hash tools from
Documentation to tools.* Deletes BUILD_DOCSRC and its dependencies"
* tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (21 commits)
selftests/futex: Check ANSI terminal color support
Doc: update 00-INDEX files to reflect the runnable code move
samples: move blackfin gptimers-example from Documentation
tools: move pcmcia crc32hash tool from Documentation
tools: move laptops dslm tool from Documentation
tools: move accounting tool from Documentation
samples: move auxdisplay example code from Documentation
samples: move watchdog example code from Documentation
samples: move timers example code from Documentation
samples: move misc-devices/mei example code from Documentation
samples: move mic/mpssd example code from Documentation
selftests: Move networking/timestamping from Documentation
selftests: move watchdog tests from Documentation/watchdog
selftests: move ia64 tests from Documentation/ia64
selftests: move vDSO tests from Documentation/vDSO
selftests: move ptp tests from Documentation/ptp
selftests: move prctl tests from Documentation/prctl
selftests: move dnotify_test from Documentation/filesystems
selftests/timers: Add missing error code assignment before test
selftests/zram: replace ZRAM_LZ4_COMPRESS
... -
Pull more powerpc updates from Michael Ellerman:
"Some more powerpc updates for 4.9:Freescale updates from Scott Wood:
- qbman support (a prerequisite for datapath drivers such as ethernet)
- a PCI DMA fix+improvement
- reset handler changes
- more 8xx optimizations
- some cleanups and fixes.'Fixes:
- selftests/powerpc: Add missing binaries to .gitignores (Michael Ellerman)
- selftests/powerpc: Fix build break caused by EXPORT_SYMBOL changes (Michael Ellerman)
- powerpc/pseries: Fix stack corruption in htpe code (Laurent Dufour)
- powerpc/64s: Fix power4_fixup_nap placement (Nicholas Piggin)
- powerpc/64: Fix incorrect return value from __copy_tofrom_user (Paul Mackerras)
- powerpc/mm/hash64: Fix might_have_hea() check (Michael Ellerman)Other:
- MAINTAINERS: Remove myself from PA Semi entries (Olof Johansson)
- MAINTAINERS: Drop separate pseries entry (Michael Ellerman)
- MAINTAINERS: Update powerpc website & add selftests (Michael Ellerman):* tag 'powerpc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (35 commits)
powerpc/mm/hash64: Fix might_have_hea() check
powerpc/64: Fix incorrect return value from __copy_tofrom_user
powerpc/64s: Fix power4_fixup_nap placement
powerpc/pseries: Fix stack corruption in htpe code
selftests/powerpc: Fix build break caused by EXPORT_SYMBOL changes
MAINTAINERS: Update powerpc website & add selftests
MAINTAINERS: Drop separate pseries entry
MAINTAINERS: Remove myself from PA Semi entries
selftests/powerpc: Add missing binaries to .gitignores
arch/powerpc: Add CONFIG_FSL_DPAA to corenetXX_smp_defconfig
soc/qman: Add self-test for QMan driver
soc/bman: Add self-test for BMan driver
soc/fsl: Introduce DPAA 1.x QMan device driver
soc/fsl: Introduce DPAA 1.x BMan device driver
powerpc/8xx: make user addr DTLB miss the short path
powerpc/8xx: Move additional DTLBMiss handlers out of exception area
powerpc/8xx: use r3 to scratch CR in ITLBmiss
soc/fsl/qe: fix gpio save_regs functions
powerpc/8xx: add dedicated machine check handler
powerpc/8xx: add system_reset_exception
...
13 Oct, 2016
2 commits
-
Sukadev reported segfault on releasing perf env's numa data. It's due
to nr_numa_nodes being set no matter if the numa data gets parsed
properly. The perf_env__exit crash the on releasing non existed data.Setting nr_numa_nodes only when data are parsed out properly.
Signed-off-by: Jiri Olsa
Reported-by: Sukadev Bhattiprolu
Cc: Adrian Hunter
Cc: David Ahern
Cc: Namhyung Kim
Cc: Wang Nan
Link: http://lkml.kernel.org/n/tip-dt9c0zgkt4hybn2cr4xiawta@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Markus reported that 'perf top --hierarchy' cannot scroll down after
refresh. This was because the number of entries are not updated when
hierarchy is enabled.Unlike normal report view, hierarchy mode needs to keep its own entry
count since it can have non-leaf entries which can expand/collapse.Reported-and-Tested-by: Markus Trippelsdorf
Signed-off-by: Namhyung Kim
Tested-by: Arnaldo Carvalho de Melo
Cc: Andi Kleen
Cc: Jiri Olsa
Cc: Peter Zijlstra
Fixes: f5b763feebe9 ("perf hists browser: Count number of hierarchy entries")
Link: http://lkml.kernel.org/r/20161007050412.3000-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo
12 Oct, 2016
5 commits
-
Merge more updates from Andrew Morton:
- a few block updates that fell in my lap
- lib/ updates
- checkpatch
- autofs
- ipc
- a ton of misc other things
* emailed patches from Andrew Morton : (100 commits)
mm: split gfp_mask and mapping flags into separate fields
fs: use mapping_set_error instead of opencoded set_bit
treewide: remove redundant #include
hung_task: allow hung_task_panic when hung_task_warnings is 0
kthread: add kerneldoc for kthread_create()
kthread: better support freezable kthread workers
kthread: allow to modify delayed kthread work
kthread: allow to cancel kthread work
kthread: initial support for delayed kthread work
kthread: detect when a kthread work is used by more workers
kthread: add kthread_destroy_worker()
kthread: add kthread_create_worker*()
kthread: allow to call __kthread_create_on_node() with va_list args
kthread/smpboot: do not park in kthread_create_on_cpu()
kthread: kthread worker API cleanup
kthread: rename probe_kthread_data() to kthread_probe_data()
scripts/tags.sh: enable code completion in VIM
mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping
kdump, vmcoreinfo: report memory sections virtual addresses
ipc/sem.c: add cond_resched in exit_sme
... -
Kernel source files need not include explicitly
because the top Makefile forces to include it with:-include $(srctree)/include/linux/kconfig.h
This commit removes explicit includes except the following:
* arch/s390/include/asm/facilities_src.h
* tools/testing/radix-tree/linux/kernel.hThese two are used for host programs.
Link: http://lkml.kernel.org/r/1473656164-11929-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The pthread_mutex_t in regression1.c wasn't being initialized properly.
Link: http://lkml.kernel.org/r/20160815194237.25967-4-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler
Cc: Konstantin Khlebnikov
Cc: Andrey Ryabinin
Cc: Dmitry Vyukov
Cc: Shuah Khan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are four cases I can see where we could end up with a NULL 'slot' in
radix_tree_next_slot(). This unit test exercises all four of them, making
sure that if in the future we have an unsafe path through
radix_tree_next_slot(), we'll catch it.Here are details on the four cases:
1) radix_tree_iter_retry() via a non-tagged iteration like
radix_tree_for_each_slot(). In this case we currently aren't seeing a bug
because radix_tree_iter_retry() setsiter->next_index = iter->index;
which means that in in the else case in radix_tree_next_slot(), 'count' is
zero, so we skip over the while() loop and effectively just return NULL
without ever dereferencing 'slot'.2) radix_tree_iter_retry() via tagged iteration like
radix_tree_for_each_tagged(). This case was giving us NULL pointer
dereferences in testing, and was fixed with this commit:commit 3cb9185c6730 ("radix-tree: fix radix_tree_iter_retry() for tagged
iterators.")This fix doesn't explicitly check for 'slot' being NULL, though, it works
around the NULL pointer dereference by instead zeroing iter->tags in
radix_tree_iter_retry(), which makes us bail out of the if() case in
radix_tree_next_slot() before we dereference 'slot'.3) radix_tree_iter_next() via via a non-tagged iteration like
radix_tree_for_each_slot(). This currently happens in shmem_tag_pins()
and shmem_partial_swap_usage().As with non-tagged iteration, 'count' in the else case of
radix_tree_next_slot() is zero, so we skip over the while() loop and
effectively just return NULL without ever dereferencing 'slot'.4) radix_tree_iter_next() via tagged iteration like
radix_tree_for_each_tagged(). This happens in shmem_wait_for_pins().radix_tree_iter_next() zeros out iter->tags, so we end up exiting
radix_tree_next_slot() here:if (flags & RADIX_TREE_ITER_TAGGED) {
void *canon = slot;iter->tags >>= 1;
if (unlikely(!iter->tags))
return NULL;Link: http://lkml.kernel.org/r/20160815194237.25967-3-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler
Cc: Konstantin Khlebnikov
Cc: Andrey Ryabinin
Cc: Dmitry Vyukov
Cc: Shuah Khan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pull libnvdimm updates from Dan Williams:
"Aside from the recently added pmem sub-division support these have
been in -next for several releases with no reported issues. The sub-
division support was included in next-20161010 with no reported
issues. It passes all unit tests including new tests for all the new
functionality below.Summary:
- PMEM sub-division support: Allow a single PMEM region to be divided
into multiple namespaces. Originally, ~2 years ago, it was thought
that partitions of a /dev/pmemX block device could handle
sub-allocations of persistent memory for different use cases. With
the decision to not support DAX mappings of raw block-devices, and
the genesis of device-dax, the need for having multiple
pmem-namespace per region has grown.- Device-DAX unified inode: In support of dynamic-resizing of a
device-dax instance the kernel arranges for all mappings of a
device-dax node to share the same inode. This allows unmap /
truncate / invalidation events to affect all instances of the
device similar to the behavior of mmap on block devices.- Hardware error scrubbing reworks: The original address-range-scrub
and badblocks tracking solution allowed clearing entries at the
individual namespace level, but it failed to clear the internal
list of media errors maintained at the bus level. The result was
that the next scrub or namespace disable/re-enable event would
restore the cleared badblocks, but now that is fixed. The v4.8
kernel introduced an auto-scrub-on-machine-check behavior to
repopulate the badblocks list. Now, in v4.9, the auto-scrub
behavior can be disabled and simply arrange for the error reported
in the machine-check to be added to the list.- DIMM health-event notification support: ACPI 6.1 defines a
notification event code that can be send to ACPI NVDIMM devices. A
poll(2) capable file descriptor for these events can be obtained
from the nmemX/nfit/flags sysfs-attribute of a libnvdimm memory
device.- Miscellaneous fixes: NVDIMM-N probe error, device-dax build error,
and a change to dedup the flush hint list to not flush the memory
controller more than necessary"* tag 'libnvdimm-for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
/dev/dax: fix Kconfig dependency build breakage
dax: use correct dev_t value
dax: convert devm_create_dax_dev to PTR_ERR
libnvdimm, namespace: allow creation of multiple pmem-namespaces per region
libnvdimm, namespace: lift single pmem limit in scan_labels()
libnvdimm, namespace: filter out of range labels in scan_labels()
libnvdimm, namespace: enable allocation of multiple pmem namespaces
libnvdimm, namespace: update label implementation for multi-pmem
libnvdimm, namespace: expand pmem device naming scheme for multi-pmem
libnvdimm, region: update nd_region_available_dpa() for multi-pmem support
libnvdimm, namespace: sort namespaces by dpa at init
libnvdimm, namespace: allow multiple pmem-namespaces per region at scan time
tools/testing/nvdimm: support for sub-dividing a pmem region
libnvdimm, namespace: unify blk and pmem label scanning
libnvdimm, namespace: refactor uuid_show() into a namespace_to_uuid() helper
libnvdimm, label: convert label tracking to a linked list
libnvdimm, region: move region-mapping input-paramters to nd_mapping_desc
nvdimm: reduce duplicated wpq flushes
libnvdimm: clear the internal poison_list when clearing badblocks
pmem: reduce kmap_atomic sections to the memcpys only
...
11 Oct, 2016
4 commits
-
Because test for color support of the running shell does not aware ANSI
type terminals, it does not print colorful messages on some environemnt.
This commit modifies the test to aware ANSI type terminal, too.Signed-off-by: SeongJae Park
Acked-by: Darren Hart
Signed-off-by: Shuah Khan -
Arnd reported that enabling CONFIG_MATOM results in a bunch of objtool
false positive frame pointer warnings:arch/x86/events/intel/ds.o: warning: objtool: intel_pmu_pebs_del()+0x43: call without frame pointer save/setup
security/keys/keyring.o: warning: objtool: keyring_read()+0x59: call without frame pointer save/setup
kernel/signal.o: warning: objtool: __dequeue_signal()+0xd8: call without frame pointer save/setup
...objtool gets confused by the fact that the '-mtune=atom' GCC option
sometimes uses 'lea (%rsp),%rbp' instead of 'mov %rsp,%rbp'. The
instructions are effectively the same, but objtool doesn't know about
the 'lea' variant.Fix the false warnings by adding support for 'lea (%rsp),%rbp' in the
objtool decoder.Reported-by: Arnd Bergmann
Signed-off-by: Josh Poimboeuf
Cc: Andy Lutomirski
Cc: Borislav Petkov
Cc: Brian Gerst
Cc: Denys Vlasenko
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar -
Pull protection keys syscall interface from Thomas Gleixner:
"This is the final step of Protection Keys support which adds the
syscalls so user space can actually allocate keys and protect memory
areas with them. Details and usage examples can be found in the
documentation.The mm side of this has been acked by Mel"
* 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pkeys: Update documentation
x86/mm/pkeys: Do not skip PKRU register if debug registers are not used
x86/pkeys: Fix pkeys build breakage for some non-x86 arches
x86/pkeys: Add self-tests
x86/pkeys: Allow configuration of init_pkru
x86/pkeys: Default to a restrictive init PKRU
pkeys: Add details of system call use to Documentation/
generic syscalls: Wire up memory protection keys syscalls
x86: Wire up protection keys system calls
x86/pkeys: Allocation/free syscalls
x86/pkeys: Make mprotect_key() mask off additional vm_flags
mm: Implement new pkey_mprotect() system call
x86/pkeys: Add fault handling for PF_PK page fault bit -
Pull perf tooling updates from Thomas Gleixner:
- handle uretprobe placement proper on little endian PPC64
- fix buffer handling in libtraceevent
- add a missing pointer derefence in perf probe
- fix the build of host tools in cross builds
- fix Intel PT timestamp handling
- synchronize memcpy, cpufeatures and bpf headers with the kernel headers
- support for vendor supplied JSON files describing PMU events
- a new set of tool tips
- initial work for clang/llvm support
- address some style issues found by cppcheck
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (35 commits)
tools build: Add feature detection for g++
tools build: Support compiling C++ source file
perf top/report: Add tips about a list option
perf report/top: Add a tip about system-wide collection from all CPUs
perf report/top: Add a tip about source line numbers with overhead
tools: Synchronize tools/include/uapi/linux/bpf.h
tools: Synchronize tools/arch/x86/include/asm/cpufeatures.h
perf bench mem: Sync memcpy assembly sources with the kernel
perf jevents: Fix Intel JSON fixed counter conversions
tools lib traceevent: Fix kbuffer_read_at_offset()
perf intel-pt: Fix MTC timestamp calculation for large MTC periods
perf intel-pt: Fix estimated timestamps for cycle-accurate mode
perf uretprobe ppc64le: Fix probe location
perf pmu-events: Add Skylake frontend MSR support
perf pmu-events: Fix fixed counters on Intel
perf tools: Make alias matching case-insensitive
perf tools: Allow period= in perf stat CPU event descriptions.
perf tools: Add README for info on parsing JSON/map files
perf list jevents: Add support for event list topics
perf list: Support long jevents descriptions
...
08 Oct, 2016
4 commits
-
Merge updates from Andrew Morton:
- fsnotify updates
- ocfs2 updates
- all of MM
* emailed patches from Andrew Morton : (127 commits)
console: don't prefer first registered if DT specifies stdout-path
cred: simpler, 1D supplementary groups
CREDITS: update Pavel's information, add GPG key, remove snail mail address
mailmap: add Johan Hovold
.gitattributes: set git diff driver for C source code files
uprobes: remove function declarations from arch/{mips,s390}
spelling.txt: "modeled" is spelt correctly
nmi_backtrace: generate one-line reports for idle cpus
arch/tile: adopt the new nmi_backtrace framework
nmi_backtrace: do a local dump_stack() instead of a self-NMI
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
min/max: remove sparse warnings when they're nested
Documentation/filesystems/proc.txt: add more description for maps/smaps
mm, proc: fix region lost in /proc/self/smaps
proc: fix timerslack_ns CAP_SYS_NICE check when adjusting self
proc: add LSM hook checks to /proc//timerslack_ns
proc: relax /proc//timerslack_ns capability requirements
meminfo: break apart a very long seq_printf with #ifdefs
seq/proc: modify seq_put_decimal_[u]ll to take a const char *, not char
proc: faster /proc/*/status
... -
Pull powerpc updates from Michael Ellerman:
"Highlights:
- Major rework of Book3S 64-bit exception vectors (Nicholas Piggin)
- Use gas sections for arranging exception vectors et. al.
- Large set of TM cleanups and selftests (Cyril Bur)
- Enable transactional memory (TM) lazily for userspace (Cyril Bur)
- Support for XZ compression in the zImage wrapper (Oliver
O'Halloran)
- Add support for bpf constant blinding (Naveen N. Rao)
- Beginnings of upstream support for PA Semi Nemo motherboards
(Darren Stevens)Fixes:
- Ensure .mem(init|exit).text are within _stext/_etext (Michael
Ellerman)
- xmon: Don't use ld on 32-bit (Michael Ellerman)
- vdso64: Use double word compare on pointers (Anton Blanchard)
- powerpc/nvram: Fix an incorrect partition merge (Pan Xinhui)
- powerpc: Fix usage of _PAGE_RO in hugepage (Christophe Leroy)
- powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K
(Aneesh Kumar K.V)
- Fix memory leak in queue_hotplug_event() error path (Andrew
Donnellan)
- Replay hypervisor maintenance interrupt first (Nicholas Piggin)Various performance optimisations (Anton Blanchard):
- Align hot loops of memset() and backwards_memcpy()
- During context switch, check before setting mm_cpumask
- Remove static branch prediction in atomic{, 64}_add_unless
- Only disable HAVE_EFFICIENT_UNALIGNED_ACCESS on POWER7 little
endian
- Set default CPU type to POWER8 for little endian buildsCleanups & features:
- Sparse fixes/cleanups (Daniel Axtens)
- Preserve CFAR value on SLB miss caused by access to bogus address
(Paul Mackerras)
- Radix MMU fixups for POWER9 (Aneesh Kumar K.V)
- Support for setting used_(vsr|vr|spe) in sigreturn path (for CRIU)
(Simon Guo)
- Optimise syscall entry for virtual, relocatable case (Nicholas
Piggin)
- Optimise MSR handling in exception handling (Nicholas Piggin)
- Support for kexec with Radix MMU (Benjamin Herrenschmidt)
- powernv EEH fixes (Russell Currey)
- Suprise PCI hotplug support for powernv (Gavin Shan)
- Endian/sparse fixes for powernv PCI (Gavin Shan)
- Defconfig updates (Anton Blanchard)
- KVM: PPC: Book3S HV: Migrate pinned pages out of CMA (Balbir Singh)
- cxl: Flush PSL cache before resetting the adapter (Frederic Barrat)
- cxl: replace loop with for_each_child_of_node(), remove unneeded
of_node_put() (Andrew Donnellan)
- Fix HV facility unavailable to use correct handler (Nicholas
Piggin)
- Remove unnecessary syscall trampoline (Nicholas Piggin)
- fadump: Fix build break when CONFIG_PROC_VMCORE=n (Michael
Ellerman)
- Quieten EEH message when no adapters are found (Anton Blanchard)
- powernv: Add PHB register dump debugfs handle (Russell Currey)
- Use kprobe blacklist for exception handlers & asm functions
(Nicholas Piggin)
- Document the syscall ABI (Nicholas Piggin)
- MAINTAINERS: Update cxl maintainers (Michael Neuling)
- powerpc: Remove all usages of NO_IRQ (Michael Ellerman)Minor cleanups:
- Andrew Donnellan, Christophe Leroy, Colin Ian King, Cyril Bur,
Frederic Barrat, Pan Xinhui, PrasannaKumar Muralidharan, Rui Teng,
Simon Guo"* tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (156 commits)
powerpc/bpf: Add support for bpf constant blinding
powerpc/bpf: Implement support for tail calls
powerpc/bpf: Introduce accessors for using the tmp local stack space
powerpc/fadump: Fix build break when CONFIG_PROC_VMCORE=n
powerpc: tm: Enable transactional memory (TM) lazily for userspace
powerpc/tm: Add TM Unavailable Exception
powerpc: Remove do_load_up_transact_{fpu,altivec}
powerpc: tm: Rename transct_(*) to ck(\1)_state
powerpc: tm: Always use fp_state and vr_state to store live registers
selftests/powerpc: Add checks for transactional VSXs in signal contexts
selftests/powerpc: Add checks for transactional VMXs in signal contexts
selftests/powerpc: Add checks for transactional FPUs in signal contexts
selftests/powerpc: Add checks for transactional GPRs in signal contexts
selftests/powerpc: Check that signals always get delivered
selftests/powerpc: Add TM tcheck helpers in C
selftests/powerpc: Allow tests to extend their kill timeout
selftests/powerpc: Introduce GPR asm helper header file
selftests/powerpc: Move VMX stack frame macros to header file
selftests/powerpc: Rework FPU stack placement macros and move to header file
selftests/powerpc: Check for VSX preservation across userspace preemption
... -
This patch will randomly perform mlock/mlock2 on a given memory region,
and verify the RLIMIT_MEMLOCK limitation works properly.Suggested-by: David Rientjes
Link: http://lkml.kernel.org/r/1473325970-11393-4-git-send-email-wei.guo.simon@gmail.com
Signed-off-by: Simon Guo
Cc: Shuah Khan
Cc: Vlastimil Babka
Cc: "Kirill A. Shutemov"
Cc: Michal Hocko
Cc: Eric B Munson
Cc: Simon Guo
Cc: Mel Gorman
Cc: Alexey Klimov
Cc: Andrea Arcangeli
Cc: Thierry Reding
Cc: Mike Kravetz
Cc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Function seek_to_smaps_entry() can be useful for other selftest
functionalities, so move it out to header file.Link: http://lkml.kernel.org/r/1473325970-11393-3-git-send-email-wei.guo.simon@gmail.com
Signed-off-by: Simon Guo
Cc: Shuah Khan
Cc: Vlastimil Babka
Cc: "Kirill A. Shutemov"
Cc: Michal Hocko
Cc: Eric B Munson
Cc: Simon Guo
Cc: Mel Gorman
Cc: Alexey Klimov
Cc: Andrea Arcangeli
Cc: Thierry Reding
Cc: Mike Kravetz
Cc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
