From: Christoph Hellwig <hch@infradead.org>
To: Yang Shi <yang.shi@linaro.org>
Cc: gregkh@linuxfoundation.org, tj@kernel.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 V2 PATCH] kernfs: create raw version kernfs_path_len and kernfs_path
Date: Sat, 27 Feb 2016 00:52:46 -0800 [thread overview]
Message-ID: <20160227085246.GC26010@infradead.org> (raw)
In-Reply-To: <1456523259-8588-1-git-send-email-yang.shi@linaro.org>
On Fri, Feb 26, 2016 at 01:47:39PM -0800, Yang Shi wrote:
> commit 5634cc2aa9aebc77bc862992e7805469dcf83dac ("writeback: update writeback
> tracepoints to report cgroup") made writeback tracepoints report cgroup
> writeback, but it may trigger the below bug on -rt kernel since kernfs_path
> and kernfs_path_len are called by tracepoints, which acquire sleeping lock.
Sounds like the tracepoints simplify shouldn't try to do this path
generation at all..
next prev parent reply other threads:[~2016-02-27 8:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-26 21:47 [RFC V2 PATCH] kernfs: create raw version kernfs_path_len and kernfs_path Yang Shi
2016-02-26 23:01 ` Greg KH
2016-02-26 23:05 ` Shi, Yang
2016-02-27 8:52 ` Christoph Hellwig [this message]
2016-02-27 11:17 ` Tejun Heo
2016-02-27 11:37 ` Thomas Gleixner
2016-02-27 11:41 ` Tejun Heo
2016-02-27 11:45 ` Thomas Gleixner
2016-02-27 11:51 ` Tejun Heo
2016-02-29 18:00 ` Shi, Yang
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