- 18 5月, 2018 5 次提交
-
-
由 Arnaldo Carvalho de Melo 提交于
Adopt it from the kernel sources, will be used soon. 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: https://lkml.kernel.org/n/tip-oubheiqj8edo5rzewt11cbn0@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
Not anymore accessed outside this library, keep it private. 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: https://lkml.kernel.org/n/tip-wg1m07flfrg1rm06jjzie8si@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
That takes care of using the right call to get the tracing_path directory, the one that will end up calling tracing_path_set() to figure out where tracefs is mounted. One more step in doing just lazy reading of system structures to reduce the number of operations done unconditionaly at 'perf' start. 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: https://lkml.kernel.org/n/tip-42zzi0f274909bg9mxzl81bu@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
Instead of accessing the trace_events_path variable directly, that may not have been properly initialized wrt detecting where tracefs is mounted. 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: https://lkml.kernel.org/n/tip-id7hzn1ydgkxbumeve5wapqz@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
When using for_each_event() we needlessly rebuild the whole path to the tracepoint directory, reuse the dir_path instead, saving some cycles and reducing the size of the next patch. 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: https://lkml.kernel.org/n/tip-54bcs15n0cp6gwcgpc4hptyc@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
- 17 5月, 2018 4 次提交
-
-
由 Arnaldo Carvalho de Melo 提交于
To make reading events files a tad more compact than with get_tracing_files("events/foo"). 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: https://lkml.kernel.org/n/tip-do6xgtwpmfl8zjs1euxsd2du@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
One should use tracing_path_mount() instead, so more things get done lazily instead of at every 'perf' tool call startup. 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: https://lkml.kernel.org/n/tip-fci4yll35idd9yuslp67vqc2@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
Its only used in the file it is defined, so just make it static. 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: https://lkml.kernel.org/n/tip-p5x29u6mq2ml3mtnbg9844ad@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
We check what perf_config__init() does at each perf_config() call, namely if the static perf_config instance was created, so instead of bailing out in that case, try to allocate it, bailing if it fails. Now to get the perf_config() call out of the start of perf's main() function, doing it also lazily. 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: Taeung Song <treeze.taeung@gmail.com> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-4bo45k6ivsmbxpfpdte4orsg@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
- 16 5月, 2018 10 次提交
-
-
由 Ingo Molnar 提交于
Merge tag 'perf-core-for-mingo-4.18-20180516' 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: - Add '-e intel_pt//u' test to the 'parse-events' 'perf test' entry, to help avoiding regressions in the events parser such as one that caused a revert in v4.17-rc (Arnaldo Carvalho de Melo) - Fix NULL return handling in bpf__prepare_load() (YueHaibing) - Warn about 'perf buildid-cache --purge-all' failures (Ravi Bangoria) - Add infrastructure to help in writing eBPF C programs to be used with '-e name.c' type events in tools such as 'record' and 'trace', with headers for common constructs and an examples directory that will get populated as we add more such helpers and the 'perf bpf' branch that Jiri Olsa has been working on (Arnaldo Carvalho de Melo) - Handle uncore event aliases in small groups properly (Kan Liang) - Use the "_stest" symbol to identify the kernel map when loading kcore (Adrian Hunter) Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NIngo Molnar <mingo@kernel.org>
-
由 YueHaibing 提交于
bpf_object__open()/bpf_object__open_buffer can return error pointer or NULL, check the return values with IS_ERR_OR_NULL() in bpf__prepare_load and bpf__prepare_load_buffer Signed-off-by: NYueHaibing <yuehaibing@huawei.com> Acked-by: NDaniel Borkmann <daniel@iogearbox.net> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: netdev@vger.kernel.org Link: https://lkml.kernel.org/n/tip-psf4xwc09n62al2cb9s33v9h@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Kan Liang 提交于
Perf stat doesn't count the uncore event aliases from the same uncore block in a group, for example: perf stat -e '{unc_m_cas_count.all,unc_m_clockticks}' -a -I 1000 # time counts unit events 1.000447342 <not counted> unc_m_cas_count.all 1.000447342 <not counted> unc_m_clockticks 2.000740654 <not counted> unc_m_cas_count.all 2.000740654 <not counted> unc_m_clockticks The output is very misleading. It gives a wrong impression that the uncore event doesn't work. An uncore block could be composed by several PMUs. An uncore event alias is a joint name which means the same event runs on all PMUs of a block. Perf doesn't support mixed events from different PMUs in the same group. It is wrong to put uncore event aliases in a big group. The right way is to split the big group into multiple small groups which only include the events from the same PMU. Only uncore event aliases from the same uncore block should be specially handled here. It doesn't make sense to mix the uncore events with other uncore events from different blocks or even core events in a group. With the patch: # time counts unit events 1.001557653 140,833 unc_m_cas_count.all 1.001557653 1,330,231,332 unc_m_clockticks 2.002709483 85,007 unc_m_cas_count.all 2.002709483 1,429,494,563 unc_m_clockticks Reported-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NKan Liang <kan.liang@linux.intel.com> Acked-by: NJiri Olsa <jolsa@kernel.org> Cc: Agustin Vega-Frias <agustinv@codeaurora.org> Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: Will Deacon <will.deacon@arm.com> Link: http://lkml.kernel.org/r/1525727623-19768-1-git-send-email-kan.liang@linux.intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Adrian Hunter 提交于
The first symbol is not necessarily in the kernel text. Instead of using the first symbol, use the _stest symbol to identify the kernel map when loading kcore. This allows for the introduction of symbols to identify the x86_64 PTI entry trampolines. Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1525866228-30321-6-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
So that kprobe definitions become: int probe(function, variables)(void *ctx, int err, var1, var2, ...) The existing 5sec.c, got converted and goes from: SEC("func=hrtimer_nanosleep rqtp->tv_sec") int func(void *ctx, int err, long sec) { } To: int probe(hrtimer_nanosleep, rqtp->tv_sec)(void *ctx, int err, long sec) { } If we decide to add tv_nsec as well, then it becomes: $ cat tools/perf/examples/bpf/5sec.c #include <bpf.h> int probe(hrtimer_nanosleep, rqtp->tv_sec rqtp->tv_nsec)(void *ctx, int err, long sec, long nsec) { return sec == 5; } license(GPL); $ And if we run it, system wide as before and run some 'sleep' with values for the tv_nsec field, we get: # perf trace --no-syscalls -e tools/perf/examples/bpf/5sec.c 0.000 perf_bpf_probe:hrtimer_nanosleep:(ffffffff9811b5f0) tv_sec=5 tv_nsec=100000000 9641.650 perf_bpf_probe:hrtimer_nanosleep:(ffffffff9811b5f0) tv_sec=5 tv_nsec=123450001 ^C# 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: https://lkml.kernel.org/n/tip-1v9r8f6ds5av0w9pcwpeknyl@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
To further reduce boilerplate. 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: https://lkml.kernel.org/n/tip-vst6hj335s0ebxzqltes3nsc@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
Description: . Disable strace like syscall tracing (--no-syscalls), or try tracing just some (-e *sleep). . Attach a filter function to a kernel function, returning when it should be considered, i.e. appear on the output: $ cat tools/perf/examples/bpf/5sec.c #include <bpf.h> SEC("func=hrtimer_nanosleep rqtp->tv_sec") int func(void *ctx, int err, long sec) { return sec == 5; } char _license[] SEC("license") = "GPL"; int _version SEC("version") = LINUX_VERSION_CODE; $ . Run it system wide, so that any sleep of >= 5 seconds and < than 6 seconds gets caught. . Ask for callgraphs using DWARF info, so that userspace can be unwound . While this is running, run something like "sleep 5s". # perf trace --no-syscalls -e tools/perf/examples/bpf/5sec.c/call-graph=dwarf/ 0.000 perf_bpf_probe:func:(ffffffff9811b5f0) tv_sec=5 hrtimer_nanosleep ([kernel.kallsyms]) __x64_sys_nanosleep ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) __GI___nanosleep (/usr/lib64/libc-2.26.so) rpl_nanosleep (/usr/bin/sleep) xnanosleep (/usr/bin/sleep) main (/usr/bin/sleep) __libc_start_main (/usr/lib64/libc-2.26.so) _start (/usr/bin/sleep) ^C# 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: https://lkml.kernel.org/n/tip-2nmxth2l2h09f9gy85lyexcq@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
So, the first helper is the one shortening a variable/function section attribute, from, for instance: char _license[] __attribute__((section("license"), used)) = "GPL"; to: char _license[] SEC("license") = "GPL"; Convert empty.c to that and it becomes: # cat ~acme/lib/examples/perf/bpf/empty.c #include <bpf.h> char _license[] SEC("license") = "GPL"; int _version SEC("version") = LINUX_VERSION_CODE; # 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: https://lkml.kernel.org/n/tip-zmeg52dlvy51rdlhyumfl5yf@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
The first one is the bare minimum that bpf infrastructure accepts before it expects actual events to be set up: $ cat tools/perf/examples/bpf/empty.c char _license[] __attribute__((section("license"), used)) = "GPL"; int _version __attribute__((section("version"), used)) = LINUX_VERSION_CODE; $ If you remove that "version" line, then it will be refused with: # perf trace -e tools/perf/examples/bpf/empty.c event syntax error: 'tools/perf/examples/bpf/empty.c' \___ Failed to load tools/perf/examples/bpf/empty.c from source: 'version' section incorrect or lost (add -v to see detail) Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events # The next ones will, step by step, show simple filters, then the needs for headers will be made clear, it will be put in place and tested with new examples, rinse, repeat. Back to using this first one to test the perf+bpf infrastructure: If we run it will fail, as no functions are present connecting with, say, a tracepoint or a function using the kprobes or uprobes infrastructure: # perf trace -e tools/perf/examples/bpf/empty.c WARNING: event parser found nothing invalid or unsupported event: 'tools/perf/examples/bpf/empty.c' Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events # But, if we set things up to dump the generated object file to a file, and do this after having run 'make install', still on the developer's $HOME directory: # cat ~/.perfconfig [llvm] dump-obj = true # # perf trace -e ~acme/lib/examples/perf/bpf/empty.c LLVM: dumping /home/acme/lib/examples/perf/bpf/empty.o WARNING: event parser found nothing invalid or unsupported event: '/home/acme/lib/examples/perf/bpf/empty.c' <SNIP> # We can look at the dumped object file: # ls -la ~acme/lib/examples/perf/bpf/empty.o -rw-r--r--. 1 root root 576 May 4 12:10 /home/acme/lib/examples/perf/bpf/empty.o # file ~acme/lib/examples/perf/bpf/empty.o /home/acme/lib/examples/perf/bpf/empty.o: ELF 64-bit LSB relocatable, *unknown arch 0xf7* version 1 (SYSV), not stripped # readelf -sw ~acme/lib/examples/perf/bpf/empty.o Symbol table '.symtab' contains 3 entries: Num: Value Size Type Bind Vis Ndx Name 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND 1: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 3 _license 2: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 4 _version # # tools/bpf/bpftool/bpftool --pretty ~acme/lib/examples/perf/bpf/empty.o null # 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: https://lkml.kernel.org/n/tip-y7dkhakejz3013o0w21n98xd@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
We'll start putting headers for helpers to be used in eBPF proggies in there: # perf trace -v --no-syscalls -e empty.c |& grep "llvm compiling command : " llvm compiling command : /usr/lib64/ccache/clang -D__KERNEL__ -D__NR_CPUS__=4 -DLINUX_VERSION_CODE=0x41100 -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/7/include -I/home/acme/git/linux/arch/x86/include -I./arch/x86/include/generated -I/home/acme/git/linux/include -I./include -I/home/acme/git/linux/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -I./include/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h -I/home/acme/lib/include/perf/bpf -Wno-unused-value -Wno-pointer-sign -working-directory /lib/modules/4.17.0-rc3-00034-gf4ef6a43/build -c /home/acme/bpf/empty.c -target bpf -O2 -o - # Notice the "-I/home/acme/lib/include/perf/bpf" 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: https://lkml.kernel.org/n/tip-6xq94xro8xlb5s9urznh3f9k@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
- 15 5月, 2018 4 次提交
-
-
由 Ravi Bangoria 提交于
Warn perf buildid-cache --purge-all failures in non verbose mode. Ex.: $ sudo chown root:root /home/ravi/.debug -R $ sudo chmod 700 /home/ravi/.debug/ -R $ ./perf buildid-cache -P Couldn't remove some caches. Error: Permission denied. Suggested-by: NMasami Hiramatsu <mhiramat@kernel.org> Signed-off-by: NRavi Bangoria <ravi.bangoria@linux.ibm.com> Acked-by: NMasami Hiramatsu <mhiramat@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20180510043651.12189-1-ravi.bangoria@linux.ibm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
To avoid regressions such as the one fixed by 4a35a902 ("Revert "perf pmu: Fix pmu events parsing rule""), where '-e intel_pt//u' got broken, with this new entry in this 'perf tests' subtest, we would have caught it before pushing upstream. Acked-by: NJiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-kw62fys9bwdgsp722so2ln1l@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Arnaldo Carvalho de Melo 提交于
To pick up fixes, notably the revert for the intel_pt//u regression. Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
-
由 Ingo Molnar 提交于
Merge tag 'perf-urgent-for-mingo-4.17-20180514' 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 segfault when processing unknown threads in cs-etm (Leo Yan) - Fix "perf test inet_pton" on s390 failing due to missing inline (Thomas Richter) - Display all available events on 'perf annotate --stdio' (Jin Yao) - Add missing newline when parsing empty BPF proggie (Arnaldo Carvalho de Melo) Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: NIngo Molnar <mingo@kernel.org>
-
- 14 5月, 2018 5 次提交
-
-
由 Linus Torvalds 提交于
-
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull x86/pti updates from Thomas Gleixner: "A mixed bag of fixes and updates for the ghosts which are hunting us. The scheduler fixes have been pulled into that branch to avoid conflicts. - A set of fixes to address a khread_parkme() race which caused lost wakeups and loss of state. - A deadlock fix for stop_machine() solved by moving the wakeups outside of the stopper_lock held region. - A set of Spectre V1 array access restrictions. The possible problematic spots were discuvered by Dan Carpenters new checks in smatch. - Removal of an unused file which was forgotten when the rest of that functionality was removed" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/vdso: Remove unused file perf/x86/cstate: Fix possible Spectre-v1 indexing for pkg_msr perf/x86/msr: Fix possible Spectre-v1 indexing in the MSR driver perf/x86: Fix possible Spectre-v1 indexing for x86_pmu::event_map() perf/x86: Fix possible Spectre-v1 indexing for hw_perf_event cache_* perf/core: Fix possible Spectre-v1 indexing for ->aux_pages[] sched/autogroup: Fix possible Spectre-v1 indexing for sched_prio_to_weight[] sched/core: Fix possible Spectre-v1 indexing for sched_prio_to_weight[] sched/core: Introduce set_special_state() kthread, sched/wait: Fix kthread_parkme() completion issue kthread, sched/wait: Fix kthread_parkme() wait-loop sched/fair: Fix the update of blocked load when newly idle stop_machine, sched: Fix migrate_swap() vs. active_balance() deadlock
-
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull scheduler fix from Thomas Gleixner: "Revert the new NUMA aware placement approach which turned out to create more problems than it solved" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Revert "sched/numa: Delay retrying placement for automatic NUMA balance after wake_affine()"
-
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip由 Linus Torvalds 提交于
Pull perf tooling fixes from Thomas Gleixner: "Another small set of perf tooling fixes and updates: - Revert "perf pmu: Fix pmu events parsing rule", as it broke Intel PT event description parsing (Arnaldo Carvalho de Melo) - Sync x86's cpufeatures.h and kvm UAPI headers with the kernel sources, suppressing the ABI drift warnings (Arnaldo Carvalho de Melo) - Remove duplicated entry for westmereep-dp in Intel's mapfile.csv (William Cohen) - Fix typo in 'perf bench numa' options description (Yisheng Xie)" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: Revert "perf pmu: Fix pmu events parsing rule" tools headers kvm: Sync ARM UAPI headers with the kernel sources tools headers kvm: Sync uapi/linux/kvm.h with the kernel sources tools headers: Sync x86 cpufeatures.h with the kernel sources perf vendor events intel: Remove duplicated entry for westmereep-dp in mapfile.csv perf bench numa: Fix typo in options
-
git://git.infradead.org/users/hch/dma-mapping由 Linus Torvalds 提交于
Pull dma-mapping fix from Christoph Hellwig: "Just one little fix from Jean to avoid a harmless but very annoying warning, especially for the drm code" * tag 'dma-mapping-4.17-5' of git://git.infradead.org/users/hch/dma-mapping: swiotlb: silent unwanted warning "buffer is full"
-
- 13 5月, 2018 3 次提交
-
-
git://git.samba.org/sfrench/cifs-2.6由 Linus Torvalds 提交于
Pull cifs fixes from Steve French: "Some small SMB3 fixes for 4.17-rc5, some for stable" * tag '4.17-rc4-SMB3-Fixes' of git://git.samba.org/sfrench/cifs-2.6: smb3: directory sync should not return an error cifs: smb2ops: Fix listxattr() when there are no EAs cifs: smbd: Enable signing with smbdirect cifs: Allocate validate negotiation request through kmalloc
-
git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux由 Linus Torvalds 提交于
Pull thermal fixes from Zhang Rui: - fix NULL pointer dereference on module load/probe for int3403_thermal driver - fix an emergency shutdown issue on exynos thermal driver * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: thermal: exynos: Propagate error value from tmu_read() thermal: exynos: Reading temperature makes sense only when TMU is turned on thermal: int3403_thermal: Fix NULL pointer deref on module load / probe
-
git://git.kernel.dk/linux-block由 Linus Torvalds 提交于
Pull block fixes from Jens Axboe: "Just a few NVMe fixes this round - one fixing a use-after-free, one fixes the return value after controller reset, and the last one fixes an issue where some drives will spuriously EIO. We should get these into 4.17" * tag 'for-linus-20180511' of git://git.kernel.dk/linux-block: nvme: add quirk to force medium priority for SQ creation nvme: Fix sync controller reset return nvme: fix use-after-free in nvme_free_ns_head
-
- 12 5月, 2018 9 次提交
-
-
由 Jean Delvare 提交于
If DMA_ATTR_NO_WARN is passed to swiotlb_alloc_buffer(), it should be passed further down to swiotlb_tbl_map_single(). Otherwise we escape half of the warnings but still log the other half. This is one of the multiple causes of spurious warnings reported at: https://bugs.freedesktop.org/show_bug.cgi?id=104082Signed-off-by: NJean Delvare <jdelvare@suse.de> Fixes: 0176adb0 ("swiotlb: refactor coherent buffer allocation") Cc: Christoph Hellwig <hch@lst.de> Cc: Christian König <christian.koenig@amd.com> Cc: Michel Dänzer <michel@daenzer.net> Cc: Takashi Iwai <tiwai@suse.de> Cc: stable@vger.kernel.org # v4.16
-
由 Mel Gorman 提交于
This reverts commit 7347fc87. Srikar Dronamra pointed out that while the commit in question did show a performance improvement on ppc64, it did so at the cost of disabling active CPU migration by automatic NUMA balancing which was not the intent. The issue was that a serious flaw in the logic failed to ever active balance if SD_WAKE_AFFINE was disabled on scheduler domains. Even when it's enabled, the logic is still bizarre and against the original intent. Investigation showed that fixing the patch in either the way he suggested, using the correct comparison for jiffies values or introducing a new numa_migrate_deferred variable in task_struct all perform similarly to a revert with a mix of gains and losses depending on the workload, machine and socket count. The original intent of the commit was to handle a problem whereby wake_affine, idle balancing and automatic NUMA balancing disagree on the appropriate placement for a task. This was particularly true for cases where a single task was a massive waker of tasks but where wake_wide logic did not apply. This was particularly noticeable when a futex (a barrier) woke all worker threads and tried pulling the wakees to the waker nodes. In that specific case, it could be handled by tuning MPI or openMP appropriately, but the behavior is not illogical and was worth attempting to fix. However, the approach was wrong. Given that we're at rc4 and a fix is not obvious, it's better to play safe, revert this commit and retry later. Signed-off-by: NMel Gorman <mgorman@techsingularity.net> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: efault@gmx.de Cc: ggherdovich@suse.cz Cc: hpa@zytor.com Cc: matt@codeblueprint.co.uk Cc: mpe@ellerman.id.au Link: http://lkml.kernel.org/r/20180509163115.6fnnyeg4vdm2ct4v@techsingularity.netSigned-off-by: NIngo Molnar <mingo@kernel.org>
-
由 Linus Torvalds 提交于
Merge misc fixes from Andrew Morton: "13 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: rbtree: include rcu.h scripts/faddr2line: fix error when addr2line output contains discriminator ocfs2: take inode cluster lock before moving reflinked inode from orphan dir mm, oom: fix concurrent munlock and oom reaper unmap, v3 mm: migrate: fix double call of radix_tree_replace_slot() proc/kcore: don't bounds check against address 0 mm: don't show nr_indirectly_reclaimable in /proc/vmstat mm: sections are not offlined during memory hotremove z3fold: fix reclaim lock-ups init: fix false positives in W+X checking lib/find_bit_benchmark.c: avoid soft lockup in test_find_first_bit() KASAN: prohibit KASAN+STRUCTLEAK combination MAINTAINERS: update Shuah's email address
-
Since commit c1adf200 ("Introduce rb_replace_node_rcu()") rbtree_augmented.h uses RCU related data structures but does not include the header file. It works as long as it gets somehow included before that and fails otherwise. Link: http://lkml.kernel.org/r/20180504103159.19938-1-bigeasy@linutronix.deSigned-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Changbin Du 提交于
When addr2line output contains discriminator, the current awk script cannot parse it. This patch fixes it by extracting key words using regex which is more reliable. $ scripts/faddr2line vmlinux tlb_flush_mmu_free+0x26 tlb_flush_mmu_free+0x26/0x50: tlb_flush_mmu_free at mm/memory.c:258 (discriminator 3) scripts/faddr2line: eval: line 173: unexpected EOF while looking for matching `)' Link: http://lkml.kernel.org/r/1525323379-25193-1-git-send-email-changbin.du@intel.com Fixes: 6870c016 ("scripts/faddr2line: show the code context") Signed-off-by: NChangbin Du <changbin.du@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: NeilBrown <neilb@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Kate Stewart <kstewart@linuxfoundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Ashish Samant 提交于
While reflinking an inode, we create a new inode in orphan directory, then take EX lock on it, reflink the original inode to orphan inode and release EX lock. Once the lock is released another node could request it in EX mode from ocfs2_recover_orphans() which causes downconvert of the lock, on this node, to NL mode. Later we attempt to initialize security acl for the orphan inode and move it to the reflink destination. However, while doing this we dont take EX lock on the inode. This could potentially cause problems because we could be starting transaction, accessing journal and modifying metadata of the inode while holding NL lock and with another node holding EX lock on the inode. Fix this by taking orphan inode cluster lock in EX mode before initializing security and moving orphan inode to reflink destination. Use the __tracker variant while taking inode lock to avoid recursive locking in the ocfs2_init_security_and_acl() call chain. Link: http://lkml.kernel.org/r/1523475107-7639-1-git-send-email-ashish.samant@oracle.comSigned-off-by: NAshish Samant <ashish.samant@oracle.com> Reviewed-by: NJoseph Qi <jiangqi903@gmail.com> Reviewed-by: NJunxiao Bi <junxiao.bi@oracle.com> Acked-by: NJun Piao <piaojun@huawei.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 David Rientjes 提交于
Since exit_mmap() is done without the protection of mm->mmap_sem, it is possible for the oom reaper to concurrently operate on an mm until MMF_OOM_SKIP is set. This allows munlock_vma_pages_all() to concurrently run while the oom reaper is operating on a vma. Since munlock_vma_pages_range() depends on clearing VM_LOCKED from vm_flags before actually doing the munlock to determine if any other vmas are locking the same memory, the check for VM_LOCKED in the oom reaper is racy. This is especially noticeable on architectures such as powerpc where clearing a huge pmd requires serialize_against_pte_lookup(). If the pmd is zapped by the oom reaper during follow_page_mask() after the check for pmd_none() is bypassed, this ends up deferencing a NULL ptl or a kernel oops. Fix this by manually freeing all possible memory from the mm before doing the munlock and then setting MMF_OOM_SKIP. The oom reaper can not run on the mm anymore so the munlock is safe to do in exit_mmap(). It also matches the logic that the oom reaper currently uses for determining when to set MMF_OOM_SKIP itself, so there's no new risk of excessive oom killing. This issue fixes CVE-2018-1000200. Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1804241526320.238665@chino.kir.corp.google.com Fixes: 21292580 ("mm: oom: let oom_reap_task and exit_mmap run concurrently") Signed-off-by: NDavid Rientjes <rientjes@google.com> Suggested-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: NMichal Hocko <mhocko@suse.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: <stable@vger.kernel.org> [4.14+] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Naoya Horiguchi 提交于
radix_tree_replace_slot() is called twice for head page, it's obviously a bug. Let's fix it. Link: http://lkml.kernel.org/r/20180423072101.GA12157@hori1.linux.bs1.fc.nec.co.jp Fixes: e71769ae ("mm: enable thp migration for shmem thp") Signed-off-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reported-by: NMatthew Wilcox <willy@infradead.org> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Zi Yan <zi.yan@sent.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-
由 Laura Abbott 提交于
The existing kcore code checks for bad addresses against __va(0) with the assumption that this is the lowest address on the system. This may not hold true on some systems (e.g. arm64) and produce overflows and crashes. Switch to using other functions to validate the address range. It's currently only seen on arm64 and it's not clear if anyone wants to use that particular combination on a stable release. So this is not urgent for stable. Link: http://lkml.kernel.org/r/20180501201143.15121-1-labbott@redhat.comSigned-off-by: NLaura Abbott <labbott@redhat.com> Tested-by: NDave Anderson <anderson@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Alexey Dobriyan <adobriyan@gmail.com>a Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
-