Date: Tue, 8 Mar 2005 01:41:41 -0800
From: Andrew Morton <akpm@osdl.org>
To: suparna@in.ibm.com
Cc: sebastien.dugue@bull.net, linux-aio@kvack.org,
       linux-kernel@vger.kernel.org, pbadari@us.ibm.com, daniel@osdl.org
Subject: Re: [PATCH] 2.6.10 -  direct-io async short read bug
Message-Id: <20050308014141.08a546a9.akpm@osdl.org>
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Suparna Bhattacharya <suparna@in.ibm.com> wrote:
>
> > > can you spot what is going wrong here that we have to try and
>  > > workaround this later ?
>  > 
>  > Good question.  Do we have the i_sem coverage to prevent a concurrent
>  > truncate?
>  > 
>  > But from Sebastien's description it doesn't soound as if a concurrent
>  > truncate is involved.
> 
>  Daniel McNeil has a testcase that reproduces the problem - seemed
>  like a single thread thing - that's what puzzles me.

OK.  It'd be nice if we could find a solution which gets around that i_size
access in the ISR, if someone has the time to look into it?

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