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From: Avi Kivity <avi@redhat.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Glauber Costa <glommer@redhat.com>,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	aliguori@codemonkey.ws, Jeremy Fitzhardinge <jeremy@goop.org>,
	Krzysztof Helt <krzysztof.h1@poczta.fm>
Subject: Re: [PATCH] regression: vmalloc easily fail.
Date: Wed, 29 Oct 2008 08:28:04 +0200	[thread overview]
Message-ID: <49080274.4040905@redhat.com> (raw)
In-Reply-To: <20081028232944.GA3759@wotan.suse.de>

Nick Piggin wrote:
> Right... that was to add a guard page like the old vmalloc allocator.
> vmallocs still add their extra page too, so most of them will have
> a 2 page guard area, but I didn't think this would hurt significantly.
>
> I'm not against the patch, but I wonder exactly what is filling it up
> and how? (can you look at the vmalloc proc function to find out?

Maybe we're allocating two guard pages, but freeing only one?

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.


  reply	other threads:[~2008-10-29  6:28 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-28 22:55 [PATCH] regression: vmalloc easily fail Glauber Costa
2008-10-28 21:03 ` Avi Kivity
2008-10-28 21:09   ` Glauber Costa
2008-10-28 21:22     ` Matias Zabaljauregui
2008-10-28 21:22   ` Roland Dreier
2008-10-28 21:42     ` Arjan van de Ven
2008-10-28 22:03       ` Roland Dreier
2008-10-28 23:29 ` Nick Piggin
2008-10-29  6:28   ` Avi Kivity [this message]
2008-10-29  9:48   ` Glauber Costa
2008-10-29 10:11     ` Nick Piggin
2008-10-29 10:29       ` Avi Kivity
2008-10-29 10:43         ` Nick Piggin
2008-10-29 22:07           ` Glauber Costa
2008-10-30  1:53             ` Nick Piggin
2008-10-30  4:49             ` Nick Piggin
2008-10-30 11:28               ` Glauber Costa
2008-10-31  7:16                 ` Nick Piggin
2008-11-04 17:51                   ` Glauber Costa
2008-11-05  0:21                   ` Glauber Costa
2008-10-30 16:46               ` Matt Mackall
2008-10-30 18:04                 ` Glauber Costa
2008-10-31  2:59                   ` Nick Piggin
2008-11-07 20:37               ` Glauber Costa

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