- 31 7月, 2015 9 次提交
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由 Oleg Nesterov 提交于
Add the new "weak" helper, arch_uretprobe_is_alive(), used by the next patches. It should return true if this return_instance is still valid. The arch agnostic version just always returns true. The patch exports "struct return_instance" for the architectures which want to override this hook. We can also cleanup prepare_uretprobe() if we pass the new return_instance to arch_uretprobe_hijack_return_addr(). Tested-by: NPratyush Anand <panand@redhat.com> Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: NAnton Arapov <arapov@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150721134016.GA4762@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Oleg Nesterov 提交于
No functional changes, preparation. Add the new helper, find_next_ret_chain(), which finds the first !chained entry and returns its ->next. Yes, it is suboptimal. We probably want to turn ->chained into ->start_of_this_chain pointer and avoid another loop. But this needs the boring changes in dup_utask(), so lets do this later. Change the main loop in handle_trampoline() to unwind the stack until ri is equal to the pointer returned by this new helper. Tested-by: NPratyush Anand <panand@redhat.com> Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: NAnton Arapov <arapov@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150721134013.GA4755@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Oleg Nesterov 提交于
Turn the last pr_warn() in uprobes.c into uprobe_warn(). While at it: - s/kzalloc/kmalloc, we initialize every member of 'ri' - remove the pointless comment above the obvious code Tested-by: NPratyush Anand <panand@redhat.com> Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: NAnton Arapov <arapov@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150721134010.GA4752@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Oleg Nesterov 提交于
1. It doesn't make sense to continue if handle_trampoline() fails, change handle_swbp() to always return after this call. 2. Turn pr_warn() into uprobe_warn(), and change handle_trampoline() to send SIGILL on failure. It is pointless to return to user mode with the corrupted instruction_pointer() which we can't restore. Tested-by: NPratyush Anand <panand@redhat.com> Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: NAnton Arapov <arapov@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150721134008.GA4745@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Oleg Nesterov 提交于
We can simplify uprobe_free_utask() and handle_uretprobe_chain() if we add a simple helper which does put_uprobe/kfree and returns the ->next return_instance. Tested-by: NPratyush Anand <panand@redhat.com> Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: NAnton Arapov <arapov@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150721134006.GA4740@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Oleg Nesterov 提交于
Cosmetic. Add the new trivial helper, get_uprobe(). It matches put_uprobe() we already have and we can simplify a couple of its users. Tested-by: NPratyush Anand <panand@redhat.com> Signed-off-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: NAnton Arapov <arapov@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150721134003.GA4736@redhat.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Ingo Molnar 提交于
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: User visible changes: - Force period term to overload global settings, i.e. previously this command line: $ perf record -e 'cpu/instructions,period=20000/',cycles -c 1000 sleep 1 would result in both events having a period equal to 1000, with the fix we get something saner: $ perf evlist -v | grep period cpu/instructions,period=20000/: ... { sample_period, sample_freq }: 20000, ... cycles: ... { sample_period, sample_freq }: 1000 ... $ (Jiri Olsa) Infrastructure changes: - Use the dummy software event with freq=0 in the twatch.py python binding example, to avoid disabling nohz. (Arnaldo Carvalho de Melo) - Add some missing constants to the python binding. (Arnaldo Carvalho de Melo) - Fix mismatched declarations for elf_getphdrnum, that happens only in the corner case where this function is not found on the system. (Arnaldo Carvalho de Melo) - Add build test for having ending double slash. (Jiri Olsa) - Introduce callgraph_set for callgraph option. (Kan Liang) Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NIngo Molnar <mingo@kernel.org>
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由 Ingo Molnar 提交于
Signed-off-by: NIngo Molnar <mingo@kernel.org>
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由 Ingo Molnar 提交于
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent fixes from Arnaldo Carvalho de Melo: - Fix 'perf stat' transaction length metrics. (Andi Kleen) - Fix test build error when bindir contains double slash. (Pawel Moll) Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NIngo Molnar <mingo@kernel.org>
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- 30 7月, 2015 4 次提交
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由 Jiri Olsa 提交于
Pawel Moll reported build issue for having extra slash (/) at the end of the prefix variable. $ make prefix=/usr/local/ CC tests/attr.o tests/attr.c: In function ‘test__attr’: tests/attr.c:168:50: error: expected ‘)’ before ‘;’ token snprintf(path_perf, PATH_MAX, "%s/perf", BINDIR); ^ tests/attr.c:176:1: error: expected ‘;’ before ‘}’ token } ^ tests/attr.c:176:1: error: control reaches end of non-void function [-Werror=return-type] } ^ cc1: all warnings being treated as errors Adding automated test case for this. Reported-by: NPawel Moll <pawel.moll@arm.com> Signed-off-by: NJiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20150727182417.GD20509@krava.brq.redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Kan Liang 提交于
Introduce callgraph_set to indicate whether the callgraph option was set by user. Signed-off-by: NKan Liang <kan.liang@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1438162936-59698-4-git-send-email-kan.liang@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Jiri Olsa 提交于
Currently the command line option settings beats the per event period settings: With no global settings, we get per-event configuration: $ perf record -e 'cpu/instructions,period=20000/' sleep 1 $ perf evlist -v ... { sample_period, sample_freq }: 20000 ... With 'c' option period setup, we get 'c' option value: $ perf record -e 'cpu/instructions,period=20000/' -c 1000 sleep 1 $ perf evlist -v ... { sample_period, sample_freq }: 1000 ... This patch makes the per-event settings overload the global 'c' option setup: $ perf record -e 'cpu/instructions,period=20000/' -c 1000 sleep 1 $ perf evlist -v ... { sample_period, sample_freq }: 20000 ... I think the making the per-event settings to overload any other config makes more sense than current state. However it breaks the current 'period' term handling, which might cause some noise.. so let's see ;-). Also fixing parse event tests with the new behaviour. Signed-off-by: NJiri Olsa <jolsa@kernel.org> Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1438162936-59698-3-git-send-email-kan.liang@intel.comSigned-off-by: NKan Liang <kan.liang@intel.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Jiri Olsa 提交于
Add support to overload any global settings for event and force user specified term value. It will be useful for new time and backtrace terms. Signed-off-by: NJiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1438162936-59698-2-git-send-email-kan.liang@intel.comSigned-off-by: NKan Liang <kan.liang@intel.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 29 7月, 2015 7 次提交
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由 Arnaldo Carvalho de Melo 提交于
The semantic associated in tools/perf/ with foo__delete(instance) is to release all resources referenced by 'instance' members and then release the memory for 'instance' itself. The perf_session_env__delete() function isn't doing this, it just does the first part, but the space used by 'instance' itself isn't freed, as it is embedded in a larger structure, that will be freed at other stage. For these cases we se foo__exit(), i.e. the usage is: void foo__delete(foo) { if (foo) { foo__exit(foo); free(foo); } } But when we have something like: struct bar { struct foo foo; . . . } Then we can't really call foo__delete(&bar.foo), we must have this instead: void bar__exit(bar) { foo__exit(&bar.foo); /* free other bar-> resources */ } void bar__delete(bar) { if (bar) { bar__exit(bar); free(bar); } } So just rename perf_session_env__delete() to perf_session_env__exit(). Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-djbgpcfo5udqptx3q0flwtmk@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
When HAVE_ELF_GETPHDRNUM_SUPPORT is false we trip on this problem: CC /tmp/build/perf/util/symbol-elf.o util/symbol-elf.c:41:12: error: static declaration of ‘elf_getphdrnum’ follows non-static declaration static int elf_getphdrnum(Elf *elf, size_t *dst) ^ In file included from util/symbol.h:19:0, from util/symbol-elf.c:8: /usr/include/libelf.h:206:12: note: previous declaration of ‘elf_getphdrnum’ was here extern int elf_getphdrnum (Elf *__elf, size_t *__dst); ^ MKDIR /tmp/build/perf/bench/ /home/git/linux/tools/build/Makefile.build:68: recipe for target '/tmp/build/perf/util/symbol-elf.o' failed make[3]: *** [/tmp/build/perf/util/symbol-elf.o] Error 1 Fix it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-qcmekyfedmov4sxr0wahcikr@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
To not sample, what we want are just the PERF_RECORD_ lifetime events for threads, using the default, PERF_TYPE_HARDWARE + PERF_COUNT_HW_CYCLES and freq=1 (the default), makes perf reenable irq_vectors:local_timer_entry, disabling nohz, not good for some use cases where all we want is to get notifications when threads comes and goes... Fix it by using PERF_TYPE_SOFTWARE (no counter rotation) and PERF_COUNT_SW_DUMMY (created by Adrian so that we could have access to those PERF_RECORD_ goodies). Reported-by: NLuiz Fernando Capitulino <lcapitulino@redhat.com> Suggested-by: NPeter Zijlstra <peterz@infradead.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jaroslav Skarvada <jskarvad@redhat.com> Cc: Jeremy Eder <jeder@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-kfsijirfrs6xfhkcdxeoen06@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
Those were added to the kernel and tooling but we forgot to expose them via the python binding, fix it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-sg1m6t2c58gchidfce4hmitg@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/n/tip-ffuchgsbr5mqu91xl9oggfss@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Arnaldo Carvalho de Melo 提交于
The python binding still doesn't provide symbol resolving facilities, but the recent addition of the trace_event__register_resolver() function made it add as a dependency the machine__resolve_kernel_addr() method, that in turn drags all the symbol resolving code. The problem: [root@zoo ~]# perf test -v python 17: Try 'import perf' in python, checking link problems : --- start --- test child forked, pid 6853 Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: /tmp/build/perf/python/perf.so: undefined symbol: machine__resolve_kernel_addr test child finished with -1 ---- end ---- Try 'import perf' in python, checking link problems: FAILED! [root@zoo ~]# Fix it by requiring this function to receive the resolver as a parameter, just like pevent_register_function_resolver(), i.e. do not explicitely refer to an object file not included in tools/perf/util/python-ext-sources. [root@zoo ~]# perf test python 17: Try 'import perf' in python, checking link problems : Ok [root@zoo ~]# Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Fixes: c3168b0d ("perf symbols: Provide libtraceevent callback to resolve kernel symbols") Link: http://lkml.kernel.org/n/tip-vxlhh95v2em9zdbgj3jm7xi5@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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由 Pawel Moll 提交于
When building with a prefix ending with a slash, for example: $ make prefix=/usr/local/ one of the perf tests fail to compile due to BUILD_STR macro mishandling bindir_SQ string containing with two slashes: -DBINDIR="BUILD_STR(/usr/local//bin)" with the following error: CC tests/attr.o tests/attr.c: In function ‘test__attr’: tests/attr.c:168:50: error: expected ‘)’ before ‘;’ token snprintf(path_perf, PATH_MAX, "%s/perf", BINDIR); ^ tests/attr.c:176:1: error: expected ‘;’ before ‘}’ token } ^ tests/attr.c:176:1: error: control reaches end of non-void function [-Werror=return-type] } ^ cc1: all warnings being treated as errors This patch works around the problem by "cleaning" the bindir string using make's abspath function. Signed-off-by: NPawel Moll <pawel.moll@arm.com> Acked-by: NJiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1438092613-21014-1-git-send-email-pawel.moll@arm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 28 7月, 2015 1 次提交
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由 Andi Kleen 提交于
The transaction length metrics in perf stat -T broke recently. It would not match the metric correctly and always print K/sec. This was caused by a incorrect update of the cycles_in_tx statistics. Update the correct variable. Also the check for zero division was reversed, which resulted in K/sec being printed for no transactions. Fix this also up. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Acked-by: NJiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/1438039491-22091-1-git-send-email-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 27 7月, 2015 5 次提交
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由 Ingo Molnar 提交于
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: New features: - Introduce PERF_RECORD_SWITCH(_CPU_WIDE) and use it in 'record' to ask for context switches, allowing non priviledged tasks to know when they are switched in and out, which wasn't possible with the other context switch tracepoint and software events, see the patch description for a comprehensive justification (Adrian Hunter) - Stop collecting /proc/kallsyms in perf.data files, saving about 4.5MB on a typical x86-64 system, use the the symbol resolution routines used in all the other tools (report, top, etc) now that we can ask libtraceevent to use perf's symbol resolution code. (Arnaldo Carvalho de Melo) User visible fixes: - Expose perf's symbol resolver to libtraceevent, so that its plugins can resolve tracepoint fields to kernel functions, like the 'function' field in the "timer:hrtimer_start tracepoint" (Arnaldo Carvalho de Melo) Infrastructure changes: - Map propagation of thread and cpu maps improvements, prep work for 'perf stat' new features (Jiri Olsa) Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NIngo Molnar <mingo@kernel.org>
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由 Peter Zijlstra 提交于
A recent fix to the shadow timestamp inadvertly broke the running time accounting. We must not update the running timestamp if we fail to schedule the event, the event will not have ran. This can (and did) result in negative total runtime because the stopped timestamp was before the running timestamp (we 'started' but never stopped the event -- because it never really started we didn't have to stop it either). Reported-and-Tested-by: NVince Weaver <vincent.weaver@maine.edu> Fixes: 72f669c0 ("perf: Update shadow timestamp before add event") Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: stable@vger.kernel.org # 4.1 Cc: Shaohua Li <shli@fb.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull perf fix from Thomas Gleixner: "A single fix for the intel cqm perf facility to prevent IPIs from interrupt context" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/cqm: Return cached counter value from IRQ context
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull x86 fixes from Thomas Gleixner: "This update contains: - the manual revert of the SYSCALL32 changes which caused a regression - a fix for the MPX vma handling - three fixes for the ioremap 'is ram' checks. - PAT warning fixes - a trivial fix for the size calculation of TLB tracepoints - handle old EFI structures gracefully This also contains a PAT fix from Jan plus a revert thereof. Toshi explained why the code is correct" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/pat: Revert 'Adjust default caching mode translation tables' x86/asm/entry/32: Revert 'Do not use R9 in SYSCALL32' commit x86/mm: Fix newly introduced printk format warnings mm: Fix bugs in region_is_ram() x86/mm: Remove region_is_ram() call from ioremap x86/mm: Move warning from __ioremap_check_ram() to the call site x86/mm/pat, drivers/media/ivtv: Move the PAT warning and replace WARN() with pr_warn() x86/mm/pat, drivers/infiniband/ipath: Replace WARN() with pr_warn() x86/mm/pat: Adjust default caching mode translation tables x86/fpu: Disable dependent CPU features on "noxsave" x86/mpx: Do not set ->vm_ops on MPX VMAs x86/mm: Add parenthesis for TLB tracepoint size calculation efi: Handle memory error structures produced based on old versions of standard
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- 26 7月, 2015 12 次提交
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由 Thomas Gleixner 提交于
Toshi explains: "No, the default values need to be set to the fallback types, i.e. minimal supported mode. For WC and WT, UC is the fallback type. When PAT is disabled, pat_init() does update the tables below to enable WT per the default BIOS setup. However, when PAT is enabled, but CPU has PAT -errata, WT falls back to UC per the default values." Revert: ca1fec58 'x86/mm/pat: Adjust default caching mode translation tables' Requested-by: NToshi Kani <toshi.kani@hp.com> Cc: Jan Beulich <jbeulich@suse.de> Link: http://lkml.kernel.org/r/1437577776.3214.252.camel@hp.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Matt Fleming 提交于
Peter reported the following potential crash which I was able to reproduce with his test program, [ 148.765788] ------------[ cut here ]------------ [ 148.765796] WARNING: CPU: 34 PID: 2840 at kernel/smp.c:417 smp_call_function_many+0xb6/0x260() [ 148.765797] Modules linked in: [ 148.765800] CPU: 34 PID: 2840 Comm: perf Not tainted 4.2.0-rc1+ #4 [ 148.765803] ffffffff81cdc398 ffff88085f105950 ffffffff818bdfd5 0000000000000007 [ 148.765805] 0000000000000000 ffff88085f105990 ffffffff810e413a 0000000000000000 [ 148.765807] ffffffff82301080 0000000000000022 ffffffff8107f640 ffffffff8107f640 [ 148.765809] Call Trace: [ 148.765810] <NMI> [<ffffffff818bdfd5>] dump_stack+0x45/0x57 [ 148.765818] [<ffffffff810e413a>] warn_slowpath_common+0x8a/0xc0 [ 148.765822] [<ffffffff8107f640>] ? intel_cqm_stable+0x60/0x60 [ 148.765824] [<ffffffff8107f640>] ? intel_cqm_stable+0x60/0x60 [ 148.765825] [<ffffffff810e422a>] warn_slowpath_null+0x1a/0x20 [ 148.765827] [<ffffffff811613f6>] smp_call_function_many+0xb6/0x260 [ 148.765829] [<ffffffff8107f640>] ? intel_cqm_stable+0x60/0x60 [ 148.765831] [<ffffffff81161748>] on_each_cpu_mask+0x28/0x60 [ 148.765832] [<ffffffff8107f6ef>] intel_cqm_event_count+0x7f/0xe0 [ 148.765836] [<ffffffff811cdd35>] perf_output_read+0x2a5/0x400 [ 148.765839] [<ffffffff811d2e5a>] perf_output_sample+0x31a/0x590 [ 148.765840] [<ffffffff811d333d>] ? perf_prepare_sample+0x26d/0x380 [ 148.765841] [<ffffffff811d3497>] perf_event_output+0x47/0x60 [ 148.765843] [<ffffffff811d36c5>] __perf_event_overflow+0x215/0x240 [ 148.765844] [<ffffffff811d4124>] perf_event_overflow+0x14/0x20 [ 148.765847] [<ffffffff8107e7f4>] intel_pmu_handle_irq+0x1d4/0x440 [ 148.765849] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765853] [<ffffffff81219bad>] ? vunmap_page_range+0x19d/0x2f0 [ 148.765854] [<ffffffff81219d11>] ? unmap_kernel_range_noflush+0x11/0x20 [ 148.765859] [<ffffffff814ce6fe>] ? ghes_copy_tofrom_phys+0x11e/0x2a0 [ 148.765863] [<ffffffff8109e5db>] ? native_apic_msr_write+0x2b/0x30 [ 148.765865] [<ffffffff8109e44d>] ? x2apic_send_IPI_self+0x1d/0x20 [ 148.765869] [<ffffffff81065135>] ? arch_irq_work_raise+0x35/0x40 [ 148.765872] [<ffffffff811c8d86>] ? irq_work_queue+0x66/0x80 [ 148.765875] [<ffffffff81075306>] perf_event_nmi_handler+0x26/0x40 [ 148.765877] [<ffffffff81063ed9>] nmi_handle+0x79/0x100 [ 148.765879] [<ffffffff81064422>] default_do_nmi+0x42/0x100 [ 148.765880] [<ffffffff81064563>] do_nmi+0x83/0xb0 [ 148.765884] [<ffffffff818c7c0f>] end_repeat_nmi+0x1e/0x2e [ 148.765886] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765888] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765890] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765891] <<EOE>> [<ffffffff8110ab66>] finish_task_switch+0x156/0x210 [ 148.765898] [<ffffffff818c1671>] __schedule+0x341/0x920 [ 148.765899] [<ffffffff818c1c87>] schedule+0x37/0x80 [ 148.765903] [<ffffffff810ae1af>] ? do_page_fault+0x2f/0x80 [ 148.765905] [<ffffffff818c1f4a>] schedule_user+0x1a/0x50 [ 148.765907] [<ffffffff818c666c>] retint_careful+0x14/0x32 [ 148.765908] ---[ end trace e33ff2be78e14901 ]--- The CQM task events are not safe to be called from within interrupt context because they require performing an IPI to read the counter value on all sockets. And performing IPIs from within IRQ context is a "no-no". Make do with the last read counter value currently event in event->count when we're invoked in this context. Reported-by: NPeter Zijlstra <peterz@infradead.org> Signed-off-by: NMatt Fleming <matt.fleming@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vikas Shivappa <vikas.shivappa@intel.com> Cc: Kanaka Juvva <kanaka.d.juvva@intel.com> Cc: Will Auld <will.auld@intel.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/1437490509-15373-1-git-send-email-matt@codeblueprint.co.ukSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb由 Linus Torvalds 提交于
Pull USB fixes from Greg KH: "Here's a few USB and PHY fixes for 4.2-rc4. Nothing major, the shortlog has the full details. All of these have been in linux-next successfully" * tag 'usb-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (21 commits) USB: OHCI: fix bad #define in ohci-tmio.c cdc-acm: Destroy acm_minors IDR on module exit usb-storage: Add ignore-device quirk for gm12u320 based usb mini projectors usb-storage: ignore ZTE MF 823 card reader in mode 0x1225 USB: OHCI: Fix race between ED unlink and URB submission usb: core: lpm: set lpm_capable for root hub device xhci: do not report PLC when link is in internal resume state xhci: prevent bus_suspend if SS port resuming in phase 1 xhci: report U3 when link is in resume state xhci: Calculate old endpoints correctly on device reset usb: xhci: Bugfix for NULL pointer deference in xhci_endpoint_init() function xhci: Workaround to get D3 working in Intel xHCI xhci: call BIOS workaround to enable runtime suspend on Intel Braswell usb: dwc3: Reset the transfer resource index on SET_INTERFACE usb: gadget: udc: core: Fix argument of dma_map_single for IOMMU usb: gadget: mv_udc_core: fix phy_regs I/O memory leak usb: ulpi: ulpi_init should be executed in subsys_initcall phy: berlin-usb: fix divider for BG2 phy: berlin-usb: fix divider for BG2CD phy/pxa: add HAS_IOMEM dependency ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty由 Linus Torvalds 提交于
Pull tty/serial driver fixes from Greg KH: "Here are a number of small serial and tty fixes for reported issues. All have been in linux-next successfully" * tag 'tty-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: vt: Fix !TASK_RUNNING diagnostic warning from paste_selection() serial: core: Fix crashes while echoing when closing m32r: Add ioreadXX/iowriteXX big-endian mmio accessors Revert "serial: imx: initialized DMA w/o HW flow enabled" sc16is7xx: fix FIFO address of secondary UART sc16is7xx: fix Kconfig dependencies serial: etraxfs-uart: Fix release etraxfs_uart_ports tty/vt: Fix the memory leak in visual_init serial: amba-pl011: Fix devm_ioremap_resource return value check n_tty: signal and flush atomically
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging由 Linus Torvalds 提交于
Pull staging driver fixes from Greg KH: "Here are a number of iio and staging driver fixes for reported issues for 4.2-rc4. All have been in linux-next for a while with no problems" * tag 'staging-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (34 commits) iio:light:stk3310: make endianness independent of host iio:light:stk3310: move device register to end of probe iio: mma8452: use iio event type IIO_EV_TYPE_MAG iio: mcp320x: Fix NULL pointer dereference iio: adc: vf610: fix the adc register read fail issue iio: mlx96014: Replace offset sign iio: magnetometer: mmc35240: fix SET/RESET sequence iio: magnetometer: mmc35240: Fix SET/RESET mask iio: magnetometer: mmc35240: Fix crash in pm suspend iio:magnetometer:bmc150_magn: output intended variable iio:magnetometer:bmc150_magn: add regmap dependency staging: vt6656: check ieee80211_bss_conf bssid not NULL staging: vt6655: check ieee80211_bss_conf bssid not NULL iio: tmp006: Check channel info on write iio: sx9500: Add missing init in sx9500_buffer_pre{en,dis}able() iio:light:ltr501: fix regmap dependency iio:light:ltr501: fix variable in ltr501_init iio: sx9500: fix bug in compensation code iio: sx9500: rework error handling of raw readings iio: magnetometer: mmc35240: fix available sampling frequencies ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc由 Linus Torvalds 提交于
Pull char/misc driver fixes from Greg KH: "Here are some char and misc driver fixes for reported issues. One parport patch is reverted as it was incorrect, thanks to testing by the 0-day bot" * tag 'char-misc-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: parport: Revert "parport: fix memory leak" mei: prevent unloading mei hw modules while the device is opened. misc: mic: scif bug fix for vmalloc_to_page crash parport: fix freeing freed memory parport: fix memory leak parport: fix error handling
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由 Sudip Mukherjee 提交于
This reverts commit 23c40591 ("parport: fix memory leak") par_dev->state was already being removed in parport_unregister_device(). Reported-by: NYing Huang <ying.huang@intel.com> Signed-off-by: NSudip Mukherjee <sudip@vectorindia.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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由 Linus Torvalds 提交于
Merge tag 'trace-v4.2-rc2-fix3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull ftrace fix from Steven Rostedt: "Back in 3.16 the ftrace code was redesigned and cleaned up to remove the double iteration list (one for registered ftrace ops, and one for registered "global" ops), to just use one list. That simplified the code but also broke the function tracing filtering on pid. This updates the code to handle the filtering again with the new logic" * tag 'trace-v4.2-rc2-fix3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace: Fix breakage of set_ftrace_pid
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git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm由 Linus Torvalds 提交于
Pull libnvdimm fix from Dan Williams: "A minor fix for the libnvdimm subsystem. This is not critical. The problem can be worked around in userspace by putting the namespace temporarily into raw mode (ndctl_namespace_set_raw_mode() from libndctl), but that is awkward for management utilities. * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm: libnvdimm: fix namespace seed creation
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git://neil.brown.name/md由 Linus Torvalds 提交于
Pull md fixes from Neil Brown: "Some md fixes for 4.2 Several are tagged for -stable. A few aren't because they are not very, serious or because they are in the 'experimental' cluster code" * tag 'md/4.2-fixes' of git://neil.brown.name/md: md/raid5: clear R5_NeedReplace when no longer needed. Fix read-balancing during node failure md-cluster: fix bitmap sub-offset in bitmap_read_sb md: Return error if request_module fails and returns positive value md: Skip cluster setup in case of error while reading bitmap md/raid1: fix test for 'was read error from last working device'. md: Skip cluster setup for dm-raid md: flush ->event_work before stopping array. md/raid10: always set reshape_safe when initializing reshape_position. md/raid5: avoid races when changing cache size.
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git://git.infradead.org/linux-mtd由 Linus Torvalds 提交于
Pull MTD fixes from Brian Norris: "Two trivial updates. I meant to send these much earlier, but I've been preoccupied. - Add MAINTAINERS entry for diskonchip g3 driver - Fix an overlooked conflict in bitfield value assignments The latter update is a bit overdue, but there's no reason to wait any longer" * tag 'for-linus-20150724' of git://git.infradead.org/linux-mtd: mtd: nand: Fix NAND_USE_BOUNCE_BUFFER flag conflict MAINTAINERS: mtd: docg3: add docg3 maintainer
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由 Dan Williams 提交于
A new BLK namespace "seed" device is created whenever the current seed is successfully probed. However, if that namespace is assigned to a BTT it may never directly experience a successful probe as it is a subordinate device to a BTT configuration. The effect of the current code is that no new namespaces can be instantiated, after the seed namespace, to consume available BLK DPA capacity. Fix this by treating a successful BTT probe event as a successful probe event for the backing namespace. Reported-by: NNicholas Moulin <nicholas.w.moulin@linux.intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 25 7月, 2015 2 次提交
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git://git.kernel.dk/linux-block由 Linus Torvalds 提交于
Pull block fixes from Jens Axboe: "Four smaller fixes for the current series. This contains: - A fix for clones of discard bio's, that can cause data corruption. From Martin. - A fix for null_blk, where in certain queue modes it could access a request after it had been freed. From Mike Krinkin. - An error handling leak fix for blkcg, from Tejun. - Also from Tejun, export of the functions that a file system needs to implement cgroup writeback support" * 'for-linus' of git://git.kernel.dk/linux-block: block: Do a full clone when splitting discard bios block: export bio_associate_*() and wbc_account_io() blkcg: fix gendisk reference leak in blkg_conf_prep() null_blk: fix use-after-free problem
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata由 Linus Torvalds 提交于
Pull libata fixes from Tejun Heo: "A couple important fixes. - A block layer change which removed restriction on max transfer size led to silent data corruption on some devices. A new quirk is added to restore the old size limit for the reported device. If it gets reported on more devices, we might have to consider restoring the restriction for ATA devices by default. - There finally is a SSD which is confirmed to cause data corruption on TRIM regardless of which flavor is used. A new quirk is added and the device is blacklisted - Other device-specific workarounds" * 'for-4.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: libata: Do not blacklist M510DC libata: increase the timeout when setting transfer mode libata: add ATA_HORKAGE_MAX_SEC_1024 to revert back to previous max_sectors limit libata: force disable trim for SuperSSpeed S238 libata: add ATA_HORKAGE_NOTRIM libata: add ATA_HORKAGE_BROKEN_FPDMA_AA quirk for HP 250GB SATA disk VB0250EAVER ata: pmp: add quirk for Marvell 4140 SATA PMP
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