linux-kernel - Re: udev loops eating 100 % CPU [mmotm 2010-05-21-16-05]

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Message-ID: <AANLkTil7Lk49FaqRPGpc0P2TIgk1_LGMBnX4EZNRSAbl@mail.gmail.com>
Date:	Wed, 26 May 2010 11:18:15 +0200
From:	Sedat Dilek <sedat.dilek@...glemail.com>
To:	hch@....de, viro@...iv.linux.org.uk, eparis@...hat.com
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: udev loops eating 100 % CPU [mmotm 2010-05-21-16-05]

[ Please CC me - I am not subscribed to LKML ]

Hi Christoph,

can you comment on why Eric's patch is "disgusting"?
Any other solutions or fixes around?

Kind Regards,
- Sedat -


Date	Tue, 25 May 2010 08:28:27 -0400
From	Christoph Hellwig <>
Subject	Re: udev loops eating 100 % CPU [mmotm 2010-05-21-16-05]

On Tue, May 25, 2010 at 08:22:12AM -0400, Eric Paris wrote:
> On Tue, 2010-05-25 at 14:12 +0200, Jiri Slaby wrote:
>
> thanks for the report, it's a known problem:
>
> http://lkml.org/lkml/2010/5/22/150
>
> Not sure yet how we are going to fix it.  You can either just revert or
> you could run this patch which I am using on my box.  Not sure which Al
> is going to want to do......
>
> commit 6e066d6c0c70e2032b5fd2b5c6375e66a0f547f9
> Author: Eric Paris <eparis@...hat.com>
> Date:   Tue May 25 07:55:46 2010 -0400
>
>     anon_inode/ioctl: push FIONREAD for anon_inode to the file handler
>
>     FIONREAD for all S_IFREG files is handled by file_ioctl but the
>     anon_inode_inode is a magic special beast since the inode is shared between
>     lots of users.  Thus ioctl calls on anon_inode_inode needs to go through
>     vfs_inode() instead of trying to shortcut some calls through file_ioctl().
>
>     Signed-off-by: Eric Paris <eparis@...hat.com>

This one is defintively far too disgusting.
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