linux-kernel - Re: [PATCH] regression: vmalloc easily fail.

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Message-ID: <20081029104333.GD5953@wotan.suse.de>
Date:	Wed, 29 Oct 2008 11:43:33 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Avi Kivity <avi@...hat.com>
Cc:	Glauber Costa <glommer@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, aliguori@...emonkey.ws,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Krzysztof Helt <krzysztof.h1@...zta.fm>
Subject: Re: [PATCH] regression: vmalloc easily fail.

On Wed, Oct 29, 2008 at 12:29:40PM +0200, Avi Kivity wrote:
> Nick Piggin wrote:
> >Hmm, spanning <30MB of memory... how much vmalloc space do you have?
> >
> >  
> 
> From the original report:
> 
> >VmallocTotal:     122880 kB
> >VmallocUsed:       15184 kB
> >VmallocChunk:      83764 kB
> 
> So it seems there's quite a bit of free space.
> 
> Chunk is the largest free contiguous region, right?  If so, it seems the 

Yes.


> problem is unrelated to guard pages, instead the search isn't finding a 
> 1-page area (with two guard pages) for some reason, even though lots of 
> free space is available.

Hmm. The free area search could be buggy...
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