- 30 Mar, 2017 2 commits
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Alexander Shishkin authored
Now that Intel PT supports more types of trace content than just branch tracing, it may be useful to allow the user to disable branch tracing when it is not needed. The special case is BDW, where not setting BranchEn is not supported. This is slightly trickier than necessary, because up to this moment the driver has been setting BranchEn automatically and the userspace assumes as much. Instead of reversing the semantics of BranchEn, we introduce a 'passthrough' bit, which will forego the default and allow the user to set BranchEn to their heart's content. Signed-off-by:
Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: vince@deater.net Link: http://lkml.kernel.org/r/20170206144140.14402-1-alexander.shishkin@linux.intel.comSigned-off-by:
Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
Signed-off-by:
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- 28 Mar, 2017 11 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
Pull virtio fixes from Michael Tsirkin: "Fixes to multiple issues in virtio. Most notably a regression fix for crashes reported by Fedora users. Hibernate is still reportedly broken, working on it" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio_balloon: prevent uninitialized variable use virtio-balloon: use actual number of stats for stats queue buffers virtio_balloon: init 1st buffer in stats vq virtio_pci: fix out of bound access for msix_names
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM fixes from Paolo Bonzini: "All x86-specific, apart from some arch-independent syzkaller fixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: cleanup the page tracking SRCU instance KVM: nVMX: fix nested EPT detection KVM: pci-assign: do not map smm memory slot pages in vt-d page tables KVM: kvm_io_bus_unregister_dev() should never fail KVM: VMX: Fix enable VPID conditions KVM: nVMX: Fix nested VPID vmx exec control KVM: x86: correct async page present tracepoint kvm: vmx: Flush TLB when the APIC-access address changes KVM: x86: use pic/ioapic destructor when destroy vm KVM: x86: check existance before destroy KVM: x86: clear bus pointer when destroyed KVM: Documentation: document MCE ioctls KVM: nVMX: don't reset kvm mmu twice PTP: fix ptr_ret.cocci warnings kvm: fix usage of uninit spinlock in avic_vm_destroy() KVM: VMX: downgrade warning on unexpected exit code
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Arnd Bergmann authored
The latest gcc-7.0.1 snapshot reports a new warning: virtio/virtio_balloon.c: In function 'update_balloon_stats': virtio/virtio_balloon.c:258:26: error: 'events[2]' is used uninitialized in this function [-Werror=uninitialized] virtio/virtio_balloon.c:260:26: error: 'events[3]' is used uninitialized in this function [-Werror=uninitialized] virtio/virtio_balloon.c:261:56: error: 'events[18]' is used uninitialized in this function [-Werror=uninitialized] virtio/virtio_balloon.c:262:56: error: 'events[17]' is used uninitialized in this function [-Werror=uninitialized] This seems absolutely right, so we should add an extra check to prevent copying uninitialized stack data into the statistics. >From all I can tell, this has been broken since the statistics code was originally added in 2.6.34. Fixes: 9564e138 ("virtio: Add memory statistics reporting to the balloon driver (V4)") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Ladi Prosek <lprosek@redhat.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com>
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Ladi Prosek authored
The virtio balloon driver contained a not-so-obvious invariant that update_balloon_stats has to update exactly VIRTIO_BALLOON_S_NR counters in order to send valid stats to the host. This commit fixes it by having update_balloon_stats return the actual number of counters, and its callers use it when pushing buffers to the stats virtqueue. Note that it is still out of spec to change the number of counters at run-time. "Driver MUST supply the same subset of statistics in all buffers submitted to the statsq." Suggested-by:
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Ladi Prosek authored
When init_vqs runs, virtio_balloon.stats is either uninitialized or contains stale values. The host updates its state with garbage data because it has no way of knowing that this is just a marker buffer used for signaling. This patch updates the stats before pushing the initial buffer. Alternative fixes: * Push an empty buffer in init_vqs. Not easily done with the current virtio implementation and violates the spec "Driver MUST supply the same subset of statistics in all buffers submitted to the statsq". * Push a buffer with invalid tags in init_vqs. Violates the same spec clause, plus "invalid tag" is not really defined. Note: the spec says: When using the legacy interface, the device SHOULD ignore all values in the first buffer in the statsq supplied by the driver after device initialization. Note: Historically, drivers supplied an uninitialized buffer in the first buffer. Unfortunately QEMU does not seem to implement the recommendation even for the legacy interface. Cc: stable@vger.kernel.org Signed-off-by:
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Jason Wang authored
Fedora has received multiple reports of crashes when running 4.11 as a guest https://bugzilla.redhat.com/show_bug.cgi?id=1430297 https://bugzilla.redhat.com/show_bug.cgi?id=1434462 https://bugzilla.kernel.org/show_bug.cgi?id=194911 https://bugzilla.redhat.com/show_bug.cgi?id=1433899 The crashes are not always consistent but they are generally some flavor of oops or GPF in virtio related code. Multiple people have done bisections (Thank you Thorsten Leemhuis and Richard W.M. Jones) and found this commit to be at fault 07ec5148 is the first bad commit commit 07ec5148 Author: Christoph Hellwig <hch@lst.de> Date: Sun Feb 5 18:15:19 2017 +0100 virtio_pci: use shared interrupts for virtqueues The issue seems to be an out of bounds access to the msix_names array corrupting kernel memory. Fixes: 07ec5148 ("virtio_pci: use shared interrupts for virtqueues") Reported-by:
Laura Abbott <labbott@redhat.com> Signed-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
Christoph Hellwig <hch@lst.de> Tested-by:
Richard W.M. Jones <rjones@redhat.com> Tested-by:
Thorsten Leemhuis <linux@leemhuis.info>
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Paolo Bonzini authored
SRCU uses a delayed work item. Skip cleaning it up, and the result is use-after-free in the work item callbacks. Reported-by:
Dmitry Vyukov <dvyukov@google.com> Suggested-by:
Xiao Guangrong <xiaoguangrong.eric@gmail.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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Ladi Prosek authored
The nested_ept_enabled flag introduced in commit 7ca29de2 was not computed correctly. We are interested only in L1's EPT state, not the the combined L0+L1 value. In particular, if L0 uses EPT but L1 does not, nested_ept_enabled must be false to make sure that PDPSTRs are loaded based on CR3 as usual, because the special case described in 26.3.2.4 Loading Page-Directory- Pointer-Table Entries does not apply. Fixes: 7ca29de2 ("KVM: nVMX: fix CR3 load if L2 uses PAE paging and EPT") Cc: qemu-stable@nongnu.org Reported-by:
Wanpeng Li <wanpeng.li@hotmail.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
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Herongguang (Stephen) authored
or VM memory are not put thus leaked in kvm_iommu_unmap_memslots() when destroy VM. This is consistent with current vfio implementation. Signed-off-by:
herongguang <herongguang.he@huawei.com> Signed-off-by:
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo-4.12-20170327' 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: - Handle inline functions in callchains (Jin Yao) - Enable sorting by srcline as key (Milian Wolff) Fixes: - Fix no_size logic in addr_filter__resolve_kernel_syms() in the auxtrace code (Adrian Hunter) - Fix some thread refcount leaks in 'perf trace' (Arnaldo Carvalho de Melo) - Fix divide by zero when calculating percent for an event in a group in the annotate by source line code (Taeung Song) - build-id files now aren't anymore symlinks, their parent directories are, so readlink the later (Taeung Song) - Assorted fixes for null termination problems, mostly related to readlink, detected by valgrind (Tommi Rantala) Infrastructure changes: - Make vfs_getname probe point logic in 'perf trace' more robust wrt length of pathname (Arnaldo Carvalho de Melo) - Remove unused 'prefix' parameter from builtins main functions (Arnaldo Carvalho de Melo) - Show 'perf list sdt' option in man page (Ravi Bangoria) Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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Ingo Molnar authored
Signed-off-by:
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- 27 Mar, 2017 20 commits
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Tommi Rantala authored
Simplification: it is easier to open /proc/self/exe than /proc/$pid/exe. Signed-off-by:
Tommi Rantala <tommi.t.rantala@nokia.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170322130624.21881-7-tommi.t.rantala@nokia.comSigned-off-by:
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Tommi Rantala authored
Ensure that the string that we read from the data file is null terminated. Valgrind was complaining: ==31357== Invalid read of size 1 ==31357== at 0x4EC8C1: __strtok_r_1c (string2.h:200) ==31357== by 0x4EC8C1: parse_ftrace_printk (trace-event-parse.c:161) ==31357== by 0x4F82A8: read_ftrace_printk (trace-event-read.c:204) ==31357== by 0x4F82A8: trace_report (trace-event-read.c:468) ==31357== by 0x4CD552: process_tracing_data (header.c:1576) ==31357== by 0x4D3397: perf_file_section__process (header.c:2705) ==31357== by 0x4D3397: perf_header__process_sections (header.c:2488) ==31357== by 0x4D3397: perf_session__read_header (header.c:2925) ==31357== by 0x4E71E2: perf_session__open (session.c:32) ==31357== by 0x4E71E2: perf_session__new (session.c:139) ==31357== by 0x429F5D: cmd_annotate (builtin-annotate.c:472) ==31357== by 0x497150: run_builtin (perf.c:359) ==31357== by 0x428CE0: handle_internal_command (perf.c:421) ==31357== by 0x428CE0: run_argv (perf.c:467) ==31357== by 0x428CE0: main (perf.c:614) ==31357== Address 0x8ac0efb is 0 bytes after a block of size 1,963 alloc'd ==31357== at 0x4C2DB9D: malloc (vg_replace_malloc.c:299) ==31357== by 0x4F827B: read_ftrace_printk (trace-event-read.c:195) ==31357== by 0x4F827B: trace_report (trace-event-read.c:468) ==31357== by 0x4CD552: process_tracing_data (header.c:1576) ==31357== by 0x4D3397: perf_file_section__process (header.c:2705) ==31357== by 0x4D3397: perf_header__process_sections (header.c:2488) ==31357== by 0x4D3397: perf_session__read_header (header.c:2925) ==31357== by 0x4E71E2: perf_session__open (session.c:32) ==31357== by 0x4E71E2: perf_session__new (session.c:139) ==31357== by 0x429F5D: cmd_annotate (builtin-annotate.c:472) ==31357== by 0x497150: run_builtin (perf.c:359) ==31357== by 0x428CE0: handle_internal_command (perf.c:421) ==31357== by 0x428CE0: run_argv (perf.c:467) ==31357== by 0x428CE0: main (perf.c:614) Signed-off-by:
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Tommi Rantala authored
Ensure that we have space for the null byte in buf. Signed-off-by:
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Tommi Rantala authored
Ensure that the string in buf is null terminated. Signed-off-by:
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Tommi Rantala authored
Valgrind was complaining: $ valgrind ./perf list >/dev/null ==11643== Memcheck, a memory error detector ==11643== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al. ==11643== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info ==11643== Command: ./perf list ==11643== ==11643== Conditional jump or move depends on uninitialised value(s) ==11643== at 0x4C30620: rindex (vg_replace_strmem.c:199) ==11643== by 0x49DAA9: build_id_cache__origname (build-id.c:198) ==11643== by 0x49E1C7: build_id_cache__valid_id (build-id.c:222) ==11643== by 0x49E1C7: build_id_cache__list_all (build-id.c:507) ==11643== by 0x4B9C8F: print_sdt_events (parse-events.c:2067) ==11643== by 0x4BB0B3: print_events (parse-events.c:2313) ==11643== by 0x439501: cmd_list (builtin-list.c:53) ==11643== by 0x497150: run_builtin (perf.c:359) ==11643== by 0x428CE0: handle_internal_command (perf.c:421) ==11643== by 0x428CE0: run_argv (perf.c:467) ==11643== by 0x428CE0: main (perf.c:614) [...] Additionally, a zero length result from readlink() is not very interesting. Signed-off-by:
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Tommi Rantala authored
Valgrind was complaining: ==2633== Syscall param open(filename) points to unaddressable byte(s) ==2633== at 0x5281CC0: __open_nocancel (syscall-template.S:84) ==2633== by 0x537D38: open (fcntl2.h:53) ==2633== by 0x537D38: get_sdt_note_list (symbol-elf.c:2017) ==2633== by 0x5396FD: probe_cache__scan_sdt (probe-file.c:700) ==2633== by 0x49EA2C: build_id_cache__add_sdt_cache (build-id.c:625) ==2633== by 0x49EA2C: build_id_cache__add_s (build-id.c:697) ==2633== by 0x49EE72: build_id_cache__add_b (build-id.c:717) ==2633== by 0x49EE72: dso__cache_build_id (build-id.c:782) ==2633== by 0x49F190: __dsos__cache_build_ids (build-id.c:793) ==2633== by 0x49F190: machine__cache_build_ids (build-id.c:801) ==2633== by 0x49F190: perf_session__cache_build_ids (build-id.c:815) ==2633== by 0x4CD4F2: write_build_id (header.c:165) ==2633== by 0x4D26F7: do_write_feat (header.c:2296) ==2633== by 0x4D26F7: perf_header__adds_write (header.c:2335) ==2633== by 0x4D26F7: perf_session__write_header (header.c:2414) ==2633== by 0x43B324: __cmd_record (builtin-record.c:1154) ==2633== by 0x43B324: cmd_record (builtin-record.c:1839) ==2633== by 0x455A07: __cmd_record (builtin-kmem.c:1868) ==2633== by 0x455A07: cmd_kmem (builtin-kmem.c:1944) ==2633== by 0x497150: run_builtin (perf.c:359) ==2633== by 0x428CE0: handle_internal_command (perf.c:421) ==2633== by 0x428CE0: run_argv (perf.c:467) ==2633== by 0x428CE0: main (perf.c:614) ==2633== Address 0x0 is not stack'd, malloc'd or (recently) free'd Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds authored
Pull EDAC updates from Borislav Petkov: "A new EDAC driver for the Pondicherry2 memory controller IP found in the Intel Apollo Lake platform and the Denverton microserver. Plus small fixlets. Normally I had this queued for 4.12 but Tony requested for the pnd2_edac driver to possibly land in 4.11 therefore I'm sending it to you now. It is a driver for new hardware which people don't have yet so it shouldn't cause any regressions. The couple of patches ontop of it show that Qiuxu actually did test it on the hardware he has access to :)" * tag 'edac_for_4.11_2' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: EDAC, pnd2_edac: Fix reported DIMM number EDAC, pnd2_edac: Fix !EDAC_DEBUG build EDAC: Select DEBUG_FS EDAC, pnd2_edac: Add new EDAC driver for Intel SoC platforms EDAC, i5000, i5400: Fix use of MTR_DRAM_WIDTH macro EDAC, xgene: Fix wrongly spelled "procesing"
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Taeung Song authored
Currently perf-annotate with --print-line can print -nan(0x8000000000000) because of division by zero when calculating percent. The division by zero happens when a sum of samples is zero in symbol__get_source_line(), so fix it. For example: After running 'perf record' like below, $ perf record -e "{cycles,page-faults,branch-misses}" ./a.out Before: $ perf annotate --stdio -l Sorted summary for file /home/taeung/workspace/a.out ---------------------------------------------- 32.89 -nan 7.04 a.c:38 25.14 -nan 0.00 a.c:34 16.26 -nan 56.34 a.c:31 15.88 -nan 1.41 a.c:37 5.67 -nan 0.00 a.c:39 1.13 -nan 35.21 a.c:26 0.95 -nan 0.00 a.c:44 0.57 -nan 0.00 a.c:32 Percent | Source code & Disassembly of a.out for cycles (529 samples) ----------------------------------------------------------------------------------------- : ... a.c:26 0.57 -nan 4.23 : 40081a: mov %edi,-0x24(%rbp) a.c:26 0.00 -nan 9.86 : 40081d: mov %rsi,-0x30(%rbp) ... However, if a sum of samples is zero (e.g. 'page-faults'), skip calculating percent. After: $ perf annotate --stdio -l Sorted summary for file /home/taeung/workspace/a.out ---------------------------------------------- 32.89 0.00 7.04 a.c:38 25.14 0.00 0.00 a.c:34 16.26 0.00 56.34 a.c:31 15.88 0.00 1.41 a.c:37 5.67 0.00 0.00 a.c:39 1.13 0.00 35.21 a.c:26 0.95 0.00 0.00 a.c:44 0.57 0.00 0.00 a.c:32 Percent | Source code & Disassembly of old for cycles (529 samples) ----------------------------------------------------------------------------------------- : ... a.c:26 0.57 0.00 4.23 : 40081a: mov %edi,-0x24(%rbp) a.c:26 0.00 0.00 9.86 : 40081d: mov %rsi,-0x30(%rbp) ... Signed-off-by:Taeung Song <treeze.taeung@gmail.com> Tested-by:
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Taeung Song authored
It is wrong way to read link name from a build-id file. Because a build-id file is not anymore a symbolic link but build-id directory of it is symbolic link, so fix it. For example, if build-id file name gotten from dso__build_id_filename() is as below, /root/.debug/.build-id/4f/75c7d197c951659d1c1b8b5fd49bcdf8f3f8b1/elf To correctly read link name of build-id, use the build-id dir path that is a symbolic link, instead of the above build-id file name like below. /root/.debug/.build-id/4f/75c7d197c951659d1c1b8b5fd49bcdf8f3f8b1 Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlLinus Torvalds authored
Pull more pin control fixes from Linus Walleij: "Here is a bunch of pin control fixes again A bit more than I'd like for this subsystem at this point, but what can I do. They are all driver fixes for hardware issues, as like "we forgot", "we didn't think of the fact that this could happen", "oops that one goes there" etc - Kconfig fixup for the TI IOdelay pinctrl-single add-on - fix up a typo in the meson i2c ao groups - switch a remapping back to use devm_ioremap() as devm_ioremap_resource() does not allow for sharing memory regions - do not clear the Qualcomm irq status bit in irq_unmask(), as this can lead to missing interrupts while the irq handler is executing - add irq_request/release_resources() on the ST driver - add a bunch of mysteriously missing pingroups for high numbered pins in the Qualcomm ipq4019 driver" * tag 'pinctrl-v4.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: pinctrl: qcom: ipq4019: add missing pingroups for pins > 70 pinctrl: st: add irq_request/release_resources callbacks pinctrl: qcom: Don't clear status bit on irq_unmask pinctrl: samsung: Fix memory mapping code pinctrl: meson-gxbb: Fix typo in i2c ao groups pinctrl: ti: The IODelay driver is a DRA7xxx feature so depend on that SoC -
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68kLinus Torvalds authored
Pull m68k updates from Geert Uytterhoeven: - build warning fix - defconfig updates - wire up new statx syscall * tag 'm68k-for-v4.11-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Wire up statx m68k/defconfig: Update defconfigs for v4.11-rc1 m68k/bitops: Correct signature of test_bit()
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Milian Wolff authored
Often it is interesting to know how costly a given source line is in total. Previously, one had to build these sums manually based on all addresses that pointed to the same source line. This patch introduces srcline as a sort key, which will do the aggregation for us. Paired with the recent addition of showing inline frames, this makes perf report much more useful for many C++ work loads. The following shows the new feature in action. First, let's show the status quo output when we sort by address. The result contains many hist entries that generate the same output: ~~~~~~~~~~~~~~~~ $ perf report --stdio --inline -g address # Children Self Command Shared Object Symbol # ........ ........ ............ ................... ......................................... # 99.89% 35.34% cpp-inlining cpp-inlining [.] main | |--64.55%--main complex:655 | /home/milian/projects/kdab/rnd/hotspot/tests/test-clients/cpp-inlining/main.cpp:39 (inline) | /usr/include/c++/6.3.1/complex:664 (inline) | | | |--60.31%--hypot +20 | | | | | |--8.52%--__hypot_finite +273 | | | | | |--7.32%--__hypot_finite +411 ... --35.34%--_start +4194346 __libc_start_main +241 | |--6.65%--main random.tcc:3326 | /home/milian/projects/kdab/rnd/hotspot/tests/test-clients/cpp-inlining/main.cpp:39 (inline) | /usr/include/c++/6.3.1/bits/random.h:1809 (inline) | /usr/include/c++/6.3.1/bits/random.h:1818 (inline) | /usr/include/c++/6.3.1/bits/random.h:185 (inline) | |--2.70%--main random.tcc:3326 | /home/milian/projects/kdab/rnd/hotspot/tests/test-clients/cpp-inlining/main.cpp:39 (inline) | /usr/include/c++/6.3.1/bits/random.h:1809 (inline) | /usr/include/c++/6.3.1/bits/random.h:1818 (inline) | /usr/include/c++/6.3.1/bits/random.h:185 (inline) | |--1.69%--main random.tcc:3326 | /home/milian/projects/kdab/rnd/hotspot/tests/test-clients/cpp-inlining/main.cpp:39 (inline) | /usr/include/c++/6.3.1/bits/random.h:1809 (inline) | /usr/include/c++/6.3.1/bits/random.h:1818 (inline) | /usr/include/c++/6.3.1/bits/random.h:185 (inline) ... ~~~~~~~~~~~~~~~~ With this patch and `-g srcline` we instead get the following output: ~~~~~~~~~~~~~~~~ $ perf report --stdio --inline -g srcline # Children Self Command Shared Object Symbol # ........ ........ ............ ................... ......................................... # 99.89% 35.34% cpp-inlining cpp-inlining [.] main | |--64.55%--main complex:655 | /home/milian/projects/kdab/rnd/hotspot/tests/test-clients/cpp-inlining/main.cpp:39 (inline) | /usr/include/c++/6.3.1/complex:664 (inline) | | | |--64.02%--hypot | | | | | --59.81%--__hypot_finite | | | --0.53%--cabs | --35.34%--_start __libc_start_main | |--12.48%--main random.tcc:3326 | /home/milian/projects/kdab/rnd/hotspot/tests/test-clients/cpp-inlining/main.cpp:39 (inline) | /usr/include/c++/6.3.1/bits/random.h:1809 (inline) | /usr/include/c++/6.3.1/bits/random.h:1818 (inline) | /usr/include/c++/6.3.1/bits/random.h:185 (inline) ... ~~~~~~~~~~~~~~~~ Signed-off-by:Milian Wolff <milian.wolff@kdab.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20170318214928.9047-1-milian.wolff@kdab.comSigned-off-by:
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Jin Yao authored
If the address belongs to an inlined function, the source information back to the first non-inlined function will be printed. For example: 1. Show inlined function name perf report -g function --inline - 0.69% 0.00% inline ld-2.23.so [.] dl_main - dl_main 0.56% _dl_relocate_object _dl_relocate_object (inline) elf_dynamic_do_Rela (inline) 2. Show the file/line information perf report -g address --inline - 0.69% 0.00% inline ld-2.23.so [.] _dl_start _dl_start rtld.c:307 /build/glibc-GKVZIf/glibc-2.23/elf/rtld.c:413 (inline) + _dl_sysdep_start dl-sysdep.c:250 Signed-off-by:Yao Jin <yao.jin@linux.intel.com> Tested-by:
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Jin Yao authored
If the address belongs to an inlined function, the source information back to the first non-inlined function will be printed. For example: 1. Show inlined function name perf report --stdio -g function --inline 0.69% 0.00% inline ld-2.23.so [.] dl_main | ---dl_main | --0.56%--_dl_relocate_object _dl_relocate_object (inline) elf_dynamic_do_Rela (inline) 2. Show the file/line information perf report --stdio -g address --inline 0.69% 0.00% inline ld-2.23.so [.] _dl_start_user | ---_dl_start_user .:0 _dl_start rtld.c:307 /build/glibc-GKVZIf/glibc-2.23/elf/rtld.c:413 (inline) _dl_sysdep_start dl-sysdep.c:250 | --0.56%--dl_main rtld.c:2076 Committer tests: # perf record --call-graph dwarf ~/bin/perf stat usleep 1 Performance counter stats for 'usleep 1': 0.443020 task-clock (msec) # 0.449 CPUs utilized 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 52 page-faults # 0.117 M/sec 1,049,423 cycles # 2.369 GHz 801,456 instructions # 0.76 insn per cycle 155,609 branches # 351.246 M/sec 7,026 branch-misses # 4.52% of all branches 0.000987570 seconds time elapsed [ perf record: Woken up 2 times to write data ] [ perf record: Captured and wrote 0.553 MB perf.data (66 samples) ] # perf report --stdio --inline fs__get_mountpoint <SNIP> 1.73% 0.00% perf perf [.] fs__get_mountpoint | ---fs__get_mountpoint fs__get_mountpoint (inline) fs__check_mounts (inline) __statfs entry_SYSCALL_64 sys_statfs SYSC_statfs user_statfs user_path_at_empty filename_lookup path_lookupat link_path_walk inode_permission __inode_permission kernfs_iop_permission kernfs_refresh_inode security_inode_notifysecctx selinux_inode_notifysecctx selinux_inode_setsecurity security_context_to_sid security_context_to_sid_core string_to_context_struct symcmp Signed-off-by: -
Jin Yao authored
It takes some time to look for inline stack for callgraph addresses. So it provides new option "--inline" to let user decide if enable this feature. --inline: If a callgraph address belongs to an inlined function, the inline stack will be printed. Each entry is the inline function name or file/line. Signed-off-by:
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Jin Yao authored
It would be useful for perf to support a mode to query the inline stack for a given callgraph address. This would simplify finding the right code in code that does a lot of inlining. The srcline.c has contained the code which supports to translate the address to filename:line_nr. This patch just extends the function to let it support getting the inline stacks. It introduces the inline_list which will store the inline function result (filename:line_nr and funcname). If BFD lib is not supported, the result is only filename:line_nr. Signed-off-by:
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Jin Yao authored
Introduce dso__name() and filename_split() out of existing code because these codes will be used in several places in next patch. For filename_split(), it may also solve a potential memory leak in existing code. In existing addr2line(), sep = strchr(filename, ':'); if (sep) { *sep++ = '\0'; *file = filename; *line_nr = strtoul(sep, NULL, 0); ret = 1; } out: pclose(fp); return ret; If sep is NULL, filename is not freed or returned via file. Signed-off-by: -
Arnaldo Carvalho de Melo authored
We got it from the git sources but never used it for anything, with the place where this would be somehow used remaining: static int run_builtin(struct cmd_struct *p, int argc, const char **argv) { prefix = NULL; if (p->option & RUN_SETUP) prefix = NULL; /* setup_perf_directory(); */ Ditch it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-uw5swz05vol0qpr32c5lpvus@git.kernel.orgSigned-off-by: -
Ravi Bangoria authored
Commit 40218dae ("perf list: Show SDT and pre-cached events") added sdt support in perf list, but it missed to update documentation. Show sdt option in man perf-list. Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by:
Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20170327025538.1753-1-ravi.bangoria@linux.vnet.ibm.comSigned-off-by:
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Adrian Hunter authored
Address filtering with kernel symbols incorrectly resulted in the error "Cannot determine size of symbol" because the no_size logic was the wrong way around. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Tested-by:
Andi Kleen <ak@linux.intel.com> Cc: stable@vger.kernel.org # v4.9+ Link: http://lkml.kernel.org/r/1490357752-27942-1-git-send-email-adrian.hunter@intel.comSigned-off-by:
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- 26 Mar, 2017 7 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char/misc driver fixes from Greg KH: "A smattering of different small fixes for some random driver subsystems. Nothing all that major, just resolutions for reported issues and bugs. All have been in linux-next with no reported issues" * tag 'char-misc-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (21 commits) extcon: int3496: Set the id pin to direction-input if necessary extcon: int3496: Use gpiod_get instead of gpiod_get_index extcon: int3496: Add dependency on X86 as it's Intel specific extcon: int3496: Add GPIO ACPI mapping table extcon: int3496: Rename GPIO pins in accordance with binding vmw_vmci: handle the return value from pci_alloc_irq_vectors correctly ppdev: fix registering same device name parport: fix attempt to write duplicate procfiles auxdisplay: img-ascii-lcd: add missing sentinel entry in img_ascii_lcd_matches Drivers: hv: vmbus: Don't leak memory when a channel is rescinded Drivers: hv: vmbus: Don't leak channel ids Drivers: hv: util: don't forget to init host_ts.lock Drivers: hv: util: move waiting for release to hv_utils_transport itself vmbus: remove hv_event_tasklet_disable/enable vmbus: use rcu for per-cpu channel list mei: don't wait for os version message reply mei: fix deadlock on mei reset intel_th: pci: Add Gemini Lake support intel_th: pci: Add Denverton SOC support intel_th: Don't leak module refcount on failure to activate ...
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Linus Torvalds authored
Merge tag 'driver-core-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fix from Greg KH: "Here is a single kernfs fix for 4.11-rc4 that resolves a reported issue. It has been in linux-next with no reported issues" * tag 'driver-core-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: kernfs: Check KERNFS_HAS_RELEASE before calling kernfs_release_file()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Pull tty/serial driver fixes from Greg KH: "Here are some tty and serial driver fixes for 4.11-rc4. One of these fix a long-standing issue in the ldisc code that was found by Dmitry Vyukov with his great fuzzing work. The other fixes resolve other reported issues, and there is one revert of a patch in 4.11-rc1 that wasn't correct. All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: fix data race in tty_ldisc_ref_wait() tty: don't panic on OOM in tty_set_ldisc() Revert "tty: serial: pl011: add ttyAMA for matching pl011 console" tty: acpi/spcr: QDF2400 E44 checks for wrong OEM revision serial: 8250_dw: Fix breakage when HAVE_CLK=n serial: 8250_dw: Honor clk_round_rate errors in dw8250_set_termios
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull IIO driver fixes from Greg KH: "Here are some small IIO driver fixes for 4.11-rc4 that resolve a number of tiny reported issues. All of these have been in linux-next for a while with no reported issues" * tag 'staging-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: iio: imu: st_lsm6dsx: fix FIFO_CTRL2 overwrite during watermark configuration iio: adc: ti_am335x_adc: fix fifo overrun recovery iio: sw-device: Fix config group initialization iio: magnetometer: ak8974: remove incorrect __exit markups iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB/PHY fixes from Greg KH: "Here are a number of small USB and PHY driver fixes for 4.11-rc4. Nothing major here, just an bunch of small fixes, and a handfull of good fixes from Johan for devices with crazy descriptors. There are a few new device ids in here as well. All of these have been in linux-next with no reported issues" * tag 'usb-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits) usb: gadget: f_hid: fix: Don't access hidg->req without spinlock held usb: gadget: udc: remove pointer dereference after free usb: gadget: f_uvc: Sanity check wMaxPacketSize for SuperSpeed usb: gadget: f_uvc: Fix SuperSpeed companion descriptor's wBytesPerInterval usb: gadget: acm: fix endianness in notifications usb: dwc3: gadget: delay unmap of bounced requests USB: serial: qcserial: add Dell DW5811e usb: hub: Fix crash after failure to read BOS descriptor ACM gadget: fix endianness in notifications USB: usbtmc: fix probe error path USB: usbtmc: add missing endpoint sanity check USB: serial: option: add Quectel UC15, UC20, EC21, and EC25 modems usb: musb: fix possible spinlock deadlock usb: musb: dsps: fix iounmap in error and exit paths usb: musb: cppi41: don't check early-TX-interrupt for Isoch transfer usb-core: Add LINEAR_FRAME_INTR_BINTERVAL USB quirk uwb: i1480-dfu: fix NULL-deref at probe uwb: hwa-rc: fix NULL-deref at probe USB: wusbcore: fix NULL-deref at probe USB: uss720: fix NULL-deref at probe ...
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull more powerpc fixes from Michael Ellerman: "These are all pretty minor. The fix for idle wakeup would be a bad bug but has not been observed in practice. The update to the gcc-plugins docs was Cc'ed to Kees and Jon, Kees OK'ed it going via powerpc and I didn't hear from Jon. - cxl: Route eeh events to all slices for pci_channel_io_perm_failure state - powerpc/64s: Fix idle wakeup potential to clobber registers - Revert "powerpc/64: Disable use of radix under a hypervisor" - gcc-plugins: update architecture list in documentation Thanks to: Andrew Donnellan, Nicholas Piggin, Paul Mackerras, Vaibhav Jain" * tag 'powerpc-4.11-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: gcc-plugins: update architecture list in documentation Revert "powerpc/64: Disable use of radix under a hypervisor" powerpc/64s: Fix idle wakeup potential to clobber registers cxl: Route eeh events to all slices for pci_channel_io_perm_failure state
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