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Groups > linux.kernel > #1351284
| From | "Shi, Yang" <yang.shi@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC V4 PATCH] trace: writeback: replace cgroup path to cgroup ino |
| Date | 2016-03-07 04:40 +0100 |
| Message-ID | <r9Ubv-5PK-1@gated-at.bofh.it> (permalink) |
| References | <r8xTI-4WU-13@gated-at.bofh.it> <r8XuO-6XQ-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Hi Steven,
Any comment on this one? I'm supposed it will be taken by your tracing tree?
Thanks,
Yang
On 3/4/2016 4:52 AM, Tejun Heo wrote:
> On Thu, Mar 03, 2016 at 01:08:57AM -0800, Yang Shi wrote:
>> commit 5634cc2aa9aebc77bc862992e7805469dcf83dac ("writeback: update writeback
>> tracepoints to report cgroup") made writeback tracepoints print out cgroup
>> path when CGROUP_WRITEBACK is enabled, but it may trigger the below bug on -rt
>> kernel since kernfs_path and kernfs_path_len are called by tracepoints, which
>> acquire spin lock that is sleepable on -rt kernel.
>
> Acked-by: Tejun Heo <tj@kernel.org>
>
> Thanks.
>
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Re: [RFC V4 PATCH] trace: writeback: replace cgroup path to cgroup ino Tejun Heo <tj@kernel.org> - 2016-03-04 14:00 +0100
Re: [RFC V4 PATCH] trace: writeback: replace cgroup path to cgroup ino "Shi, Yang" <yang.shi@linaro.org> - 2016-03-07 04:40 +0100
Re: [RFC V4 PATCH] trace: writeback: replace cgroup path to cgroup ino Steven Rostedt <rostedt@goodmis.org> - 2016-03-07 15:10 +0100
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