- 05 Jun, 2019 8 commits
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Adrian Hunter authored
In preparation for providing instructions-per-cycle (IPC) information, accumulate cycle count from CYC packets. Although CYC packets are optional (requires config term 'cyc' to enable cycle-accurate mode when recording), the simplest way to count cycles is with CYC packets. The first complication is that cycles must be counted only when also counting instructions. That means when control flow packet generation is enabled i.e. between TIP.PGE and TIP.PGD packets. Also, sampling the cycle count follows the same rules as sampling the timestamp, that is, not before the instruction to which the decoder is walking is reached. In addition, the cycle count is not accurate for any but the first branch of a TNT packet. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/20190520113728.14389-6-adrian.hunter@intel.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Adrian Hunter authored
To eliminate some duplication and make the code more understandable, factor out intel_pt_update_sample_time. Signed-off-by:
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Alexey Budankov authored
When DWARF stacks were requested and at the same time that the user specifies a register set using the --user-regs option the full register context was being captured on samples: $ perf record -g --call-graph dwarf,1024 --user-regs=IP,SP,BP -- stack_test2.g.O3 188143843893585 0x6b48 [0x4f8]: PERF_RECORD_SAMPLE(IP, 0x4002): 23828/23828: 0x401236 period: 1363819 addr: 0x7ffedbdd51ac ... FP chain: nr:0 ... user regs: mask 0xff0fff ABI 64-bit .... AX 0x53b .... BX 0x7ffedbdd3cc0 .... CX 0xffffffff .... DX 0x33d3a .... SI 0x7f09b74c38d0 .... DI 0x0 .... BP 0x401260 .... SP 0x7ffedbdd3cc0 .... IP 0x401236 .... FLAGS 0x20a .... CS 0x33 .... SS 0x2b .... R8 0x7f09b74c3800 .... R9 0x7f09b74c2da0 .... R10 0xfffffffffffff3ce .... R11 0x246 .... R12 0x401070 .... R13 0x7ffedbdd5db0 .... R14 0x0 .... R15 0x0 ... ustack: size 1024, offset 0xe0 . data_src: 0x5080021 ... thread: stack_test2.g.O:23828 ...... dso: /root/abudanko/stacks/stack_test2.g.O3 I.e. the --user-regs=IP,SP,BP was being ignored, being overridden by the needs of --call-graph=dwarf. After applying the change in this patch the sample data contains the user specified register, but making sure that at least the minimal set of register needed for DWARF unwinding (DWARF_MINIMAL_REGS) is requested. The user is warned that DWARF unwinding may not work if extra registers end up being needed. -g call-graph dwarf,K full_regs --user-regs=user_regs user_regs -g call-graph dwarf,K --user-regs=user_regs user_regs + DWARF_MINIMAL_REGS $ perf record -g --call-graph dwarf,1024 --user-regs=BP -- ls WARNING: The use of --call-graph=dwarf may require all the user registers, specifying a subset with --user-regs may render DWARF unwinding unreliable, so the minimal registers set (IP, SP) is explicitly forced. arch COPYING Documentation include Kbuild lbuild MAINTAINERS modules.builtin Module.symvers perf.data.old scripts System.map virt block CREDITS drivers init Kconfig lib Makefile modules.builtin.modinfo net README security tools vmlinux certs crypto fs ipc kernel LICENSES mm modules.order perf.data samples sound usr vmlinux.o [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.030 MB perf.data (10 samples) ] 188368474305373 0x5e40 [0x470]: PERF_RECORD_SAMPLE(IP, 0x4002): 23839/23839: 0x401236 period: 1260507 addr: 0x7ffd3d85e96c ... FP chain: nr:0 ... user regs: mask 0x1c0 ABI 64-bit .... BP 0x401260 .... SP 0x7ffd3d85cc20 .... IP 0x401236 ... ustack: size 1024, offset 0x58 . data_src: 0x5080021 Committer notes: Detected build failures on arches where PERF_REGS_ is not available, such as debian:experimental-x-{mips,mips64,mipsel}, fedora 24 and 30 for ARC uClibc and glibc, reported to Alexey that provided a patch moving the DWARF_MINIMAL_REGS from evsel.c to util/perf_regs.h, where it is guarded by an HAVE_PERF_REGS_SUPPORT ifdef. Committer testing: # perf record --user-regs=bp,ax -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.955 MB perf.data (1773 samples) ] # perf script -F+uregs | grep AX: | head -5 perf 1719 [000] 181.272398: 1 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffef828fb00 perf 1719 [000] 181.272402: 1 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffef828fb00 perf 1719 [000] 181.272403: 8 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffef828fb00 perf 1719 [000] 181.272405: 181 cycles: ffffffffba06a7c6 native_write_msr+0x6 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffef828fb00 perf 1719 [000] 181.272406: 4405 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffef828fb00 # perf record --call-graph=dwarf --user-regs=bp,ax -a sleep 1 WARNING: The use of --call-graph=dwarf may require all the user registers, specifying a subset with --user-regs may render DWARF unwinding unreliable, so the minimal registers set (IP, SP) is explicitly forced. [ perf record: Woken up 55 times to write data ] [ perf record: Captured and wrote 24.184 MB perf.data (2841 samples) ] [root@quaco ~]# perf script --hide-call-graph -F+uregs | grep AX: | head -5 perf 1729 [000] 211.268006: 1 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffc8679abb0 SP:0x7ffc8679ab78 IP:0x7fa75223a0db perf 1729 [000] 211.268014: 1 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffc8679abb0 SP:0x7ffc8679ab78 IP:0x7fa75223a0db perf 1729 [000] 211.268017: 5 cycles: ffffffffba06a7c4 native_write_msr+0x4 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffc8679abb0 SP:0x7ffc8679ab78 IP:0x7fa75223a0db perf 1729 [000] 211.268020: 48 cycles: ffffffffba06a7c6 native_write_msr+0x6 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffc8679abb0 SP:0x7ffc8679ab78 IP:0x7fa75223a0db perf 1729 [000] 211.268024: 490 cycles: ffffffffba00e471 intel_bts_enable_local+0x21 (/lib/modules/5.2.0-rc1+/build/vmlinux) ABI:2 AX:0xffffffffffffffda BP:0x7ffc8679abb0 SP:0x7ffc8679ab78 IP:0x7fa75223a0db # Signed-off-by:Alexey Budankov <alexey.budankov@linux.intel.com> Tested-by:
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Leo Yan authored
Variable 'err' is defined but never used in function symsrc__init(), remove it and directly return -1 at the end of the function. Signed-off-by:
Leo Yan <leo.yan@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190530093801.20510-1-leo.yan@linaro.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
We forgot to update the perf.data file format document for the HEADER_DIR_FORMAT header, do it now from comments in the patch introducing it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Chong Jiang <chongjiang@chromium.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Que <sque@chromium.org> Fixes: 258031c0 ("perf header: Add DIR_FORMAT feature to describe directory data") Link: https://lkml.kernel.org/n/tip-jbrzb7ijb5al33gi8br6f9rr@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
We forgot to update the perf.data file format document for the HEADER_CLOCKID header, do it now from comments in the patch introducing it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Chong Jiang <chongjiang@chromium.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Que <sque@chromium.org> Fixes: cf790516 ("perf record: Encode -k clockid frequency into Perf trace") Link: https://lkml.kernel.org/n/tip-slhnjp06027j3ae17qqetzxj@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
We forgot to update the perf.data file format document for the HEADER_MEM_TOPOLOGY header, do it now from comments in the patch introducing it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Chong Jiang <chongjiang@chromium.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Simon Que <sque@chromium.org> Fixes: e2091ced ("perf tools: Add MEM_TOPOLOGY feature to perf data file") Link: https://lkml.kernel.org/n/tip-h5lcm1nbe9ztxwm61gmadd56@git.kernel.orgSigned-off-by:
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Song Liu authored
This patch addes description of HEADER_BPF_PROG_INFO and HEADER_BPF_BTF to perf.data-file-format.txt. Requested-by:
Song Liu <songliubraving@fb.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: 606f972b ("perf bpf: Save bpf_prog_info information as headers to perf.data") Link: http://lkml.kernel.org/r/20190521064406.2498925-1-songliubraving@fb.comSigned-off-by:
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- 03 Jun, 2019 14 commits
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Ingo Molnar authored
Signed-off-by:Ingo Molnar <mingo@kernel.org>
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Jiri Olsa authored
Using the new pmu::update_attrs attribute group for default attributes - freeze_on_smi, allow_tsx_force_abort. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190512155518.21468-10-jolsa@kernel.orgSigned-off-by:
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Jiri Olsa authored
Using the new pmu::update_attrs attribute group for skylake specific format attributes. Signed-off-by:
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Jiri Olsa authored
Using the new pmu::update_attrs attribute group for extra "format" directory. Signed-off-by:
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Jiri Olsa authored
Using the new pmu::update_attrs attribute group for "caps" directory. Signed-off-by:
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Jiri Olsa authored
We dont need to pre-filter out unsupported base events, we can just use its group's is_visible function to do this. Signed-off-by:
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Jiri Olsa authored
Using the new pmu::update_attrs attribute group to create detected events for x86_pmu. Moving the topdown/memory/tsx attributes to separate attribute groups with specific is_visible functions. Signed-off-by:
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Jiri Olsa authored
Nobody is using that. Signed-off-by:
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Jiri Olsa authored
Adding attr_update attribute group into pmu, to allow having multiple attribute groups for same group name. This will allow us to update "events" or "format" directories with attributes that depend on various HW conditions. For example having group_format_extra group that updates "format" directory only if pmu version is 2 and higher: static umode_t exra_is_visible(struct kobject *kobj, struct attribute *attr, int i) { return x86_pmu.version >= 2 ? attr->mode : 0; } static struct attribute_group group_format_extra = { .name = "format", .is_visible = exra_is_visible, }; Signed-off-by: -
Jiri Olsa authored
Adding sysfs_update_groups function to update multiple groups. sysfs_update_groups - given a directory kobject, create a bunch of attribute groups @kobj: The kobject to update the group on @groups: The attribute groups to update, NULL terminated This function update a bunch of attribute groups. If an error occurs when updating a group, all previously updated groups will be removed together with already existing (not updated) attributes. Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190512155518.21468-2-jolsa@kernel.orgSigned-off-by:
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Gayatri Kammela authored
AmberLake and WhiskeyLake have same client uncore events as KabyLake. Thus add the PCI IDs for AmberLake Y processor lines, for WhiskeyLake U processor lines and for KabyLake, add H processor line and workstation. Platform Device ID ================================ AML Y 2 Core 590Ch KBL H 4 Core 5910h KBL 4 Core WorkStation 5918h WHL U 4 Core 3ED0h WHL U 4 Core 3E34h WHL U 2 Core 3E35h AML Y 4 Core 590Dh Signed-off-by:
Gayatri Kammela <gayatri.kammela@intel.com> Signed-off-by:
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Gayatri Kammela authored
Improve code readability by adding tabs after #define macros Signed-off-by:
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Song Liu authored
Currently, non-privileged user could only use uprobe with kernel.perf_event_paranoid = -1 However, setting perf_event_paranoid to -1 leaks other users' processes to non-privileged uprobes. To introduce proper permission control of uprobes, we are building the following system: A daemon with CAP_SYS_ADMIN is in charge to create uprobes via tracefs; Users asks the daemon to create uprobes; Then user can attach uprobe only to processes owned by the user. This patch allows non-privileged user to attach uprobe to processes owned by the user. The following example shows how to use uprobe with non-privileged user. This is based on Brendan's blog post [1] 1. Create uprobe with root: sudo perf probe -x 'readline%return +0($retval):string' 2. Then non-root user can use the uprobe as: perf record -vvv -e probe_bash:readline__return -p <pid> sleep 20 perf script [1] http://www.brendangregg.com/blog/2015-06-28/linux-ftrace-uprobe.htmlSigned-off-by: -
Ingo Molnar authored
Signed-off-by:
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- 02 Jun, 2019 14 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Ingo Molnar: "Two fixes: a quirk for KVM guests running on certain AMD CPUs, and a KASAN related build fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/CPU/AMD: Don't force the CPB cap when running under a hypervisor x86/boot: Provide KASAN compatible aliases for string routines
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf fixes from Ingo Molnar: "On the kernel side there's a bunch of ring-buffer ordering fixes for a reproducible bug, plus a PEBS constraints regression fix. Plus tooling fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tools headers UAPI: Sync kvm.h headers with the kernel sources perf record: Fix s390 missing module symbol and warning for non-root users perf machine: Read also the end of the kernel perf test vmlinux-kallsyms: Ignore aliases to _etext when searching on kallsyms perf session: Add missing swap ops for namespace events perf namespace: Protect reading thread's namespace tools headers UAPI: Sync drm/drm.h with the kernel tools headers UAPI: Sync drm/i915_drm.h with the kernel tools headers UAPI: Sync linux/fs.h with the kernel tools headers UAPI: Sync linux/sched.h with the kernel tools arch x86: Sync asm/cpufeatures.h with the with the kernel tools include UAPI: Update copy of files related to new fspick, fsmount, fsconfig, fsopen, move_mount and open_tree syscalls perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel perf data: Fix 'strncat may truncate' build failure with recent gcc perf/ring-buffer: Use regular variables for nesting perf/ring-buffer: Always use {READ,WRITE}_ONCE() for rb->user_page data perf/ring_buffer: Add ordering to rb->nest increment perf/ring_buffer: Fix exposing a temporarily decreased data_head perf/x86/intel/ds: Fix EVENT vs. UEVENT PEBS constraints
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull EFI fixes from Ingo Molnar: "Two EFI fixes: a quirk for weird systabs, plus add more robust error handling in the old 1:1 mapping code" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi: Allow the number of EFI configuration tables entries to be zero efi/x86/Add missing error handling to old_memmap 1:1 mapping code
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull stacktrace fix from Ingo Molnar: "Fix a stack_trace_save_tsk_reliable() regression" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: stacktrace: Unbreak stack_trace_save_tsk_reliable()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-coreLinus Torvalds authored
Pull SPDX fixes from Greg KH: "Here are just two small patches, that fix up some found SPDX identifier issues. The first patch fixes an error in a previous SPDX fixup patch, that causes build errors when doing 'make clean' on the tree (the fact that almost no one noticed it reflects the fact that kernel developers don't like doing that option very often...) The second patch fixes up a number of places in the tree where people mistyped the string "SPDX-License-Identifier". Given that people can not even type their own name all the time without mistakes, this was bound to happen, and odds are, we will have to add some type of check for this to checkpatch.pl to catch this happening in the future. Both of these have passed testing by 0-day" * tag 'spdx-5.2-rc3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: treewide: fix typos of SPDX-License-Identifier crypto: ux500 - fix license comment syntax error
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "A minor fix to our IMC PMU code to print a less confusing error message when the driver can't initialise properly. A fix for a bug where a user requesting an unsupported branch sampling filter can corrupt PMU state, preventing the PMU from counting properly. And finally a fix for a bug in our support for kexec_file_load(), which prevented loading a kernel and initramfs. Most versions of kexec don't yet use kexec_file_load(). Thanks to: Anju T Sudhakar, Dave Young, Madhavan Srinivasan, Ravi Bangoria, Thiago Jung Bauermann" * tag 'powerpc-5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/kexec: Fix loading of kernel + initramfs with kexec_file_load() powerpc/perf: Fix MMCRA corruption by bhrb_filter powerpc/powernv: Return for invalid IMC domain
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM fixes from Paolo Bonzini: "Fixes for PPC and s390" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: PPC: Book3S HV: Restore SPRG3 in kvmhv_p9_guest_entry() KVM: PPC: Book3S HV: Fix lockdep warning when entering guest on POWER9 KVM: PPC: Book3S HV: XIVE: Fix page offset when clearing ESB pages KVM: PPC: Book3S HV: XIVE: Take the srcu read lock when accessing memslots KVM: PPC: Book3S HV: XIVE: Do not clear IRQ data of passthrough interrupts KVM: PPC: Book3S HV: XIVE: Introduce a new mutex for the XIVE device KVM: PPC: Book3S HV: XIVE: Fix the enforced limit on the vCPU identifier KVM: PPC: Book3S HV: XIVE: Do not test the EQ flag validity when resetting KVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released KVM: PPC: Book3S HV: Don't take kvm->lock around kvm_for_each_vcpu KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list KVM: PPC: Book3S HV: Use new mutex to synchronize MMU setup KVM: PPC: Book3S HV: Avoid touching arch.mmu_ready in XIVE release functions KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID kvm: fix compile on s390 part 2
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fixes from Wolfram Sang: "A memleak fix for the core, two driver bugfixes, as well as fixing missing file patterns to MAINTAINERS" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: MAINTAINERS: add I2C DT bindings to ARM platforms MAINTAINERS: add DT bindings to i2c drivers i2c: synquacer: fix synquacer_i2c_doxfer() return value i2c: mlxcpld: Fix wrong initialization order in probe i2c: dev: fix potential memory leak in i2cdev_ioctl_rdwr
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git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermalLinus Torvalds authored
Pull thermal SoC fix from Eduardo Valentin: "A single revert, detected to cause issues on the tsens driver" * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal: Revert "drivers: thermal: tsens: Add new operation to check if a sensor is enabled"
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Linus Torvalds authored
Merge tag 'led-fixes-for-5.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds Pull LED fix from Jacek Anaszewski: "Fix for a recent change in LED core, that didn't take into account the possibility of calling led_blink_setup() from atomic context" * tag 'led-fixes-for-5.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: leds: avoid flush_work in atomic context
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: - A set of patches fixing code comments / kerneldoc (Bart) - Don't allow loop file change for exclusive open (Jan) - Fix revalidate of hidden genhd (Jan) - Init queue failure memory free fix (Jes) - Improve rq limits failure print (John) - Fixup for queue removal/addition (Ming) - Missed error progagation for io_uring buffer registration (Pavel) * tag 'for-linus-20190601' of git://git.kernel.dk/linux-block: block: print offending values when cloned rq limits are exceeded blk-mq: Document the blk_mq_hw_queue_to_node() arguments blk-mq: Fix spelling in a source code comment block: Fix bsg_setup_queue() kernel-doc header block: Fix rq_qos_wait() kernel-doc header block: Fix blk_mq_*_map_queues() kernel-doc headers block: Fix throtl_pending_timer_fn() kernel-doc header block: Convert blk_invalidate_devt() header into a non-kernel-doc header block/partitions/ldm: Convert a kernel-doc header into a non-kernel-doc header blk-mq: Fix memory leak in error handling block: don't protect generic_make_request_checks with blk_queue_enter block: move blk_exit_queue into __blk_release_queue block: Don't revalidate bdev of hidden gendisk loop: Don't change loop device under exclusive opener io_uring: Fix __io_uring_register() false success
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Six minor fixes to device drivers and one to the multipath alua handler. The most extensive fix is the zfcp port remove prevention one, but it's impact is only s390" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: libsas: delete sas port if expander discover failed scsi: libsas: only clear phy->in_shutdown after shutdown event done scsi: scsi_dh_alua: Fix possible null-ptr-deref scsi: smartpqi: properly set both the DMA mask and the coherent DMA mask scsi: zfcp: fix to prevent port_remove with pure auto scan LUNs (only sdevs) scsi: zfcp: fix missing zfcp_port reference put on -EBUSY from port_remove scsi: libcxgbi: add a check for NULL pointer in cxgbi_check_route()
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "Various fixes and followups" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm, compaction: make sure we isolate a valid PFN include/linux/generic-radix-tree.h: fix kerneldoc comment kernel/signal.c: trace_signal_deliver when signal_group_exit drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used spdxcheck.py: fix directory structures kasan: initialize tag to 0xff in __kasan_kmalloc z3fold: fix sheduling while atomic scripts/gdb: fix invocation when CONFIG_COMMON_CLK is not set mm/gup: continue VM_FAULT_RETRY processing even for pre-faults ocfs2: fix error path kobject memory leak memcg: make it work on sparse non-0-node systems mm, memcg: consider subtrees in memory.events prctl_set_mm: downgrade mmap_sem to read lock prctl_set_mm: refactor checks from validate_prctl_map kernel/fork.c: make max_threads symbol static arch/arm/boot/compressed/decompress.c: fix build error due to lz4 changes arch/parisc/configs/c8000_defconfig: remove obsoleted CONFIG_DEBUG_SLAB_LEAK mm/vmalloc.c: fix typo in comment lib/sort.c: fix kernel-doc notation warnings mm: fix Documentation/vm/hmm.rst Sphinx warnings
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- 01 Jun, 2019 4 commits
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Suzuki K Poulose authored
When we have holes in a normal memory zone, we could endup having cached_migrate_pfns which may not necessarily be valid, under heavy memory pressure with swapping enabled ( via __reset_isolation_suitable(), triggered by kswapd). Later if we fail to find a page via fast_isolate_freepages(), we may end up using the migrate_pfn we started the search with, as valid page. This could lead to accessing NULL pointer derefernces like below, due to an invalid mem_section pointer. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 [47/1825] Mem abort info: ESR = 0x96000004 Exception class = DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp = 0000000082f94ae9 [0000000000000008] pgd=0000000000000000 Internal error: Oops: 96000004 [#1] SMP ... CPU: 10 PID: 6080 Comm: qemu-system-aar Not tainted 510-rc1+ #6 Hardware name: AmpereComputing(R) OSPREY EV-883832-X3-0001/OSPREY, BIOS 4819 09/25/2018 pstate: 60000005 (nZCv daif -PAN -UAO) pc : set_pfnblock_flags_mask+0x58/0xe8 lr : compaction_alloc+0x300/0x950 [...] Process qemu-system-aar (pid: 6080, stack limit = 0x0000000095070da5) Call trace: set_pfnblock_flags_mask+0x58/0xe8 compaction_alloc+0x300/0x950 migrate_pages+0x1a4/0xbb0 compact_zone+0x750/0xde8 compact_zone_order+0xd8/0x118 try_to_compact_pages+0xb4/0x290 __alloc_pages_direct_compact+0x84/0x1e0 __alloc_pages_nodemask+0x5e0/0xe18 alloc_pages_vma+0x1cc/0x210 do_huge_pmd_anonymous_page+0x108/0x7c8 __handle_mm_fault+0xdd4/0x1190 handle_mm_fault+0x114/0x1c0 __get_user_pages+0x198/0x3c0 get_user_pages_unlocked+0xb4/0x1d8 __gfn_to_pfn_memslot+0x12c/0x3b8 gfn_to_pfn_prot+0x4c/0x60 kvm_handle_guest_abort+0x4b0/0xcd8 handle_exit+0x140/0x1b8 kvm_arch_vcpu_ioctl_run+0x260/0x768 kvm_vcpu_ioctl+0x490/0x898 do_vfs_ioctl+0xc4/0x898 ksys_ioctl+0x8c/0xa0 __arm64_sys_ioctl+0x28/0x38 el0_svc_common+0x74/0x118 el0_svc_handler+0x38/0x78 el0_svc+0x8/0xc Code: f8607840 f100001f 8b011401 9a801020 (f9400400) ---[ end trace af6a35219325a9b6 ]--- The issue was reported on an arm64 server with 128GB with holes in the zone (e.g, [32GB@4GB, 96GB@544GB]), with a swap device enabled, while running 100 KVM guest instances. This patch fixes the issue by ensuring that the page belongs to a valid PFN when we fallback to using the lower limit of the scan range upon failure in fast_isolate_freepages(). Link: http://lkml.kernel.org/r/1558711908-15688-1-git-send-email-suzuki.poulose@arm.com Fixes: 5a811889 ("mm, compaction: use free lists to quickly locate a migration target") Signed-off-by:
Suzuki K Poulose <suzuki.poulose@arm.com> Reported-by:
Marc Zyngier <marc.zyngier@arm.com> Reviewed-by:
Mel Gorman <mgorman@techsingularity.net> Reviewed-by:
Anshuman Khandual <anshuman.khandual@arm.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Qian Cai <cai@lca.pw> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jonathan Corbet authored
The DOC comment block section in include/linux/generic-radix-tree.h contained a spurious colon, causing this warning in the documentation build: include/linux/generic-radix-tree.h:1: warning: no structured comments found Remove the colon and make the docs build happy. Link: http://lkml.kernel.org/r/20190524141933.74ae9050@lwn.netSigned-off-by:
Jonathan Corbet <corbet@lwn.net> Reviewed-by:
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Zhenliang Wei authored
In the fixes commit, removing SIGKILL from each thread signal mask and executing "goto fatal" directly will skip the call to "trace_signal_deliver". At this point, the delivery tracking of the SIGKILL signal will be inaccurate. Therefore, we need to add trace_signal_deliver before "goto fatal" after executing sigdelset. Note: SEND_SIG_NOINFO matches the fact that SIGKILL doesn't have any info. Link: http://lkml.kernel.org/r/20190425025812.91424-1-weizhenliang@huawei.com Fixes: cf43a757 ("signal: Restore the stop PTRACE_EVENT_EXIT") Signed-off-by:
Zhenliang Wei <weizhenliang@huawei.com> Reviewed-by:
Christian Brauner <christian@brauner.io> Reviewed-by:
Oleg Nesterov <oleg@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Ivan Delalande <colona@arista.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Deepa Dinamani <deepa.kernel@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by:
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Qian Cai authored
Commit cf04eee8 ("iommu/vt-d: Include ACPI devices in iommu=pt") added for_each_active_iommu() in iommu_prepare_static_identity_mapping() but never used the each element, i.e, "drhd->iommu". drivers/iommu/intel-iommu.c: In function 'iommu_prepare_static_identity_mapping': drivers/iommu/intel-iommu.c:3037:22: warning: variable 'iommu' set but not used [-Wunused-but-set-variable] struct intel_iommu *iommu; Fixed the warning by appending a compiler attribute __maybe_unused for it. Link: http://lkml.kernel.org/r/20190523013314.2732-1-cai@lca.pwSigned-off-by:
Qian Cai <cai@lca.pw> Suggested-by:
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