linux-kernel - Re: sysfs reclaim crash

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Message-ID: <20070327184921.GA2057@in.ibm.com>
Date:	Wed, 28 Mar 2007 00:19:21 +0530
From:	Maneesh Soni <maneesh@...ibm.com>
To:	Ethan Solomita <solo@...gle.com>
Cc:	Dipankar Sarma <dipankar@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>, Martin Bligh <mbligh@...gle.com>,
	Rohit Seth <rohitseth@...gle.com>, viro@....linux.org.uk,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: sysfs reclaim crash

On Tue, Mar 27, 2007 at 11:27:14AM -0700, Ethan Solomita wrote:
> 	Hi Maneesh -- I will start testing with the patch you provided. If 
> 	you come up with any further issues please let me know. Also, if you could 
> suggest some additional BUG() lines that I could insert I would 
> appreciate it. Since the bug is hard to reproduce, it may be easier to 
> catch a race condition in the making via BUG() than an actual failure 
> due to a race condition.
> 

Hi Ethan,

Thanks for testing. The BUG_ON in sysfs_d_iput() is still there to catch
the first race we saw. And the second one should not occur as now we are not
using the s_dentry in sysfs_readdir(). 

Regards,
Maneesh

--
Maneesh Soni
Linux Technology Center,
IBM India Systems and Technology Lab, 
Bangalore, India
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