Yang Jihong 47d32f8bec perf record: Fix continue profiling after draining the buffer ... [ Upstream commit e16c2ce7c5ed5de881066c1fd10ba5c09af69559 ] Commit da231338ec ("perf record: Use an eventfd to wakeup when done") uses eventfd() to solve a rare race where the setting and checking of 'done' which add done_fd to pollfd. When draining buffer, revents of done_fd is 0 and evlist__filter_pollfd function returns a non-zero value. As a result, perf record does not stop profiling. The following simple scenarios can trigger this condition: # sleep 10 & # perf record -p $! After the sleep process exits, perf record should stop profiling and exit. However, perf record keeps running. If pollfd revents contains only POLLERR or POLLHUP, perf record indicates that buffer is draining and need to stop profiling. Use fdarray_flag__nonfilterable() to set done eventfd to nonfilterable objects, so that evlist__filter_pollfd() does not filter and check done eventfd. Fixes: da231338ec ("perf record: Use an eventfd to wakeup when done") Signed-off-by: Yang Jihong <yangjihong1@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexey Budankov <alexey.budankov@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: zhangjinhao2@huawei.com Link: http://lore.kernel.org/lkml/20210205065001.23252-1-yangjihong1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-03-04 11:38:09 +01:00
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accounting
arch	x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes	2020-12-06 09:58:13 +01:00
bootconfig	tools/bootconfig: Add tracing_on support to helper scripts	2021-01-19 18:27:19 +01:00
bpf	tools: Factor HOSTCC, HOSTLD, HOSTAR definitions	2021-01-30 13:55:19 +01:00
build	tools: Factor HOSTCC, HOSTLD, HOSTAR definitions	2021-01-30 13:55:19 +01:00
cgroup
debugging
edid
firewire
firmware
gpio	tools: gpio: fix %llu warning in gpio-watch.c	2021-01-27 11:55:20 +01:00
hv
iio
include	tools headers UAPI: Sync linux/fscrypt.h with the kernel sources	2021-01-17 14:17:06 +01:00
io_uring
kvm/kvm_stat	tools/kvm_stat: Exempt time-based counters	2020-12-11 19:18:51 -05:00
laptop
leds
lib	libbpf: Ignore non function pointer member in struct_ops	2021-03-04 11:37:33 +01:00
memory-model
objtool	objtool: Fix ".cold" section suffix check for newer versions of GCC	2021-03-04 11:38:00 +01:00
pci
pcmcia
perf	perf record: Fix continue profiling after draining the buffer	2021-03-04 11:38:09 +01:00
power	tools/power/x86/intel-speed-select: Set higher of cpuinfo_max_freq or base_frequency	2021-02-07 15:37:13 +01:00
scripts	tools: Factor HOSTCC, HOSTLD, HOSTAR definitions	2021-01-30 13:55:19 +01:00
spi
testing	selftests/ftrace: Update synthetic event syntax errors	2021-03-04 11:38:07 +01:00
thermal/tmon
time
usb
virtio
vm
wmi
Makefile