Hello,
On Fri 23-10-20 08:38:42, kernel test robot wrote:
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 9b93f33105f5f9bd3d016ff870eb6000c9d89eff ("fsnotify: send event with
> parent/name info to sb/mount/non-dir marks")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
>
> in testcase: will-it-scale
> version: will-it-scale-x86_64-b695a1b-1_20201007
> with following parameters:
>
> nr_task: 192
> mode: process
> test: read2
> cpufreq_governor: performance
> ucode: 0x11
>
...
> [ 117.801209] perf version 5.9.rc8.gc85fb28b6f99
> [ 117.801219]
> [ 182.458747] perf: interrupt took too long (2668 > 2500),perf: interrupt
> took too long (4516 > 4352), lowering kernel.perf_event_max_sample_rate to
> 44000
> lowering kernel.perf_event_max_sample_rperf: interrupt took too long (5950 >
> 5645), lowering kernel.perf_event_max_sample_rate to 33000
> ate to 74000
> perf: interrupt took too long (7658 > 7437), lowering
> kernel.perf_event_max_sample_rate to 26000
> [ 182.502968] perf: interrupt took too long (7658 > 7437), lowering
> kernel.perf_event_max_sample_rate to 26000
> [ 182.525840] perf: interrupt took too long (9889 > 9572), lowering
> kernel.perf_event_max_sample_rate to 20000
> f_event_max_sample_rate to 12000
> [ 182.560905] perf: interrupt took too long (21827 > 20585), lowering
> kernel.perf_event_max_sample_rate to 9000
> [ 182.609949] perf: interrupt took too long (30149 > 27283), lowering
> kernel.perf_event_max_sample_rate to 6000
> [ 182.622872] perf: interrupt took too long (38986 > 37686), lowering
> kernel.perf_event_max_sample_rate to 5000
> [ 182.672850] perf: interrupt took too long (50874 > 48732), lowering
> kernel.perf_event_max_sample_rate to 3000
> [ 182.732849] perf: interrupt took too long (63885 > 63592), lowering
> kernel.perf_event_max_sample_rate to 3000
> [ 182.751847] perf: interrupt took too long (80901 > 79856), lowering
> kernel.perf_event_max_sample_rate to 2000
> [ 188.527603] WARNING: missing R10 value at __fsnotify_parent+0x25/0x280
OK, that's an unwinder warning but we don't do anything special in
__fsnotify_parent(). Let's CC x86 guys if they have idea what's going on.
Honza
--
Jan Kara <j...@suse.com>
SUSE Labs, CR
