linux-kernel - Re: 2.6.20-rc4: known unfixed regressions (v2)

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Message-ID: <45A6CDE3.90001@yahoo.com.au>
Date:	Fri, 12 Jan 2007 10:53:07 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	"Vladimir V. Saveliev" <vs@...esys.com>
CC:	reiserfs-dev@...esys.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.20-rc4: known unfixed regressions (v2)

Vladimir V. Saveliev wrote:
> Hello
> 
> On Thursday 11 January 2007 04:00, Nick Piggin wrote:

>>That's racy, unfortunately :P
>>
> 
> 
> Sorry, please, explain what is racy.
> reiserfs_truncate and reiserfs_release call that function after they have inode's mutex locked.

Calling truncate inside i_size (ie. vmtruncate_range is also racy), because
of the way that the pagefault side of the equation works (eg. truncate_count).

But if you're only calling truncate on files that are never mmapped, then I
think that race should disappear.

-- 
SUSE Labs, Novell Inc.
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