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From: Jiri Slaby <jirislaby@gmail.com>
To: JD <jd1008@gmail.com>
Cc: Eric Paris <eparis@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: udevd high cpu hogging in kernel-2.6.34   git8 to git-13
Date: Fri, 28 May 2010 08:10:03 +0200	[thread overview]
Message-ID: <4BFF5E3B.5060305@gmail.com> (raw)
In-Reply-To: <4BFF5D6C.3010207@gmail.com>

Added lkml back to CC.

On 05/28/2010 08:06 AM, JD wrote:
> But here goes:
> I have seen this behaviour in all the git releases from git8
> to the current 2.6.34-git13
> 
> I have some of the analysis based on strace, and kernel stack
> trace.
> Instead of backing out the whole code for the new udevd, perhaps
> it (udevd) should sleep for some time before polling the same fd
> again.

So if you see in the strace output the poll to return immediately with
out fd being an anon_inode (check /proc/pid_of_udev/fd/), it is the
issue. AFAIK, it was not fixed upstream yet.

So could you try to revert a7cf4145b?

-- 
js

  parent reply	other threads:[~2010-05-28  6:10 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-28  5:36 udevd high cpu hogging in kernel-2.6.34 git8 to git-13 JD
2010-05-28  5:50 ` Jiri Slaby
     [not found]   ` <4BFF5D6C.3010207@gmail.com>
2010-05-28  6:10     ` Jiri Slaby [this message]
2010-06-17 16:21       ` JD
  -- strict thread matches above, loose matches on Subject: below --
2010-05-28  4:14 JD

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