linux-kernel - Re: [bug?] bio: add experimental support for inlining a number of bio

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Message-Id: <20081210131311.e03d6fc5.akpm@linux-foundation.org>
Date:	Wed, 10 Dec 2008 13:13:11 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	kosaki.motohiro@...fujitsu.com, sfr@...b.auug.org.au,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [bug?] bio: add experimental support for inlining a number of
 bio_vecs inside the bio

On Wed, 10 Dec 2008 13:12:38 +0100
Jens Axboe <jens.axboe@...cle.com> wrote:

> > experimental??
> 
> Experimental in the sense that it's the first version, not the concept.
> It's held up well for me, but just yesterday I received the first bug
> report on a ppc platform and now you have this on ia64.


Well there's another bug report up-list.  "next-20081209: pdflush: page
allocation failure (xfs)".

The clearing of (__GFP_WAIT | __GFP_IO) will call the page allocator in the
weakest possible mode and will of course spew page allocations warnings
with great frequency.  It should at least add in __GFP_NOWARN.
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