linux-kernel - Re: [PATCH] remove throttle_vm

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Message-Id: <E1IdkTY-0002tc-00@dorka.pomaz.szeredi.hu>
Date:	Fri, 05 Oct 2007 12:32:08 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	a.p.zijlstra@...llo.nl
CC:	akpm@...ux-foundation.org, wfg@...l.ustc.edu.cn,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remove throttle_vm_writeout()

> I think that's an improvement in all respects.
> 
> However it still does not generally address the deadlock scenario: if
> there's a small DMA zone, and fuse manages to put all of those pages
> under writeout, then there's trouble.

And the only way to solve that AFAICS, is to make sure fuse never uses
more than e.g. 50% of _any_ zone for page cache.  And that may need
some tweaking in the allocator...

Miklos
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