From: Tejun Heo <tj@kernel.org>
To: Yang Shi <yang.shi@linaro.org>
Cc: gregkh@linuxfoundation.org, lizefan@huawei.com,
tglx@linutronix.de, rostedt@goodmis.org, bigeasy@linutronix.de,
linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
linaro-kernel@lists.linaro.org
Subject: Re: [RFC V4 PATCH] trace: writeback: replace cgroup path to cgroup ino
Date: Fri, 4 Mar 2016 07:52:24 -0500 [thread overview]
Message-ID: <20160304125224.GG13868@htj.duckdns.org> (raw)
In-Reply-To: <1456996137-8354-1-git-send-email-yang.shi@linaro.org>
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.
--
tejun
next prev parent reply other threads:[~2016-03-04 12:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-03 9:08 [RFC V4 PATCH] trace: writeback: replace cgroup path to cgroup ino Yang Shi
2016-03-04 12:52 ` Tejun Heo [this message]
2016-03-07 3:32 ` Shi, Yang
2016-03-07 14:03 ` Steven Rostedt
2016-03-29 14:30 ` Sebastian Andrzej Siewior
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160304125224.GG13868@htj.duckdns.org \
--to=tj@kernel.org \
--cc=bigeasy@linutronix.de \
--cc=gregkh@linuxfoundation.org \
--cc=linaro-kernel@lists.linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=lizefan@huawei.com \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=yang.shi@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).