linux-kernel - RE: [PATCH] aio: fix kernel bug when page is temporally busy

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Message-ID: <Pine.LNX.4.64.0702091106100.25686@twin.jikos.cz>
Date:	Fri, 9 Feb 2007 11:11:52 +0100 (CET)
From:	Jiri Kosina <jikos@...os.cz>
To:	"Ananiev, Leonid I" <leonid.i.ananiev@...el.com>
cc:	suparna@...ibm.com, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-aio <linux-aio@...ck.org>,
	Zach Brown <zach.brown@...cle.com>,
	Chris Mason <chris.mason@...cle.com>,
	Badari Pulavarty <pbadari@...ibm.com>, Jan Kara <jack@...e.cz>
Subject: RE: [PATCH] aio: fix kernel bug when page is  temporally busy

On Fri, 9 Feb 2007, Ananiev, Leonid I wrote:

> I have used EIOCBRETRY in the patch to minimize source code modification 
> only. It is notable that EIOCBRETRY is never set in kernel, but tested 
> only.

There is indeed something strange in aio in 2.6.20 (and maybe older) - for 
example do_generic_mapping_read() gets stuck inside lock_page() in the 
situation when the page is not up-to-date, instead of returning properl 
error to aio_run_cb().

Or does it work in some other way and I get it wrong?

-- 
Jiri Kosina
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