linux-kernel - kvm broken with new vmap

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Date:	Mon, 27 Oct 2008 21:07:28 -0200
From:	Glauber Costa <glommer@...hat.com>
To:	npiggin@...e.de
Cc:	avi@...hat.com, linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	mtosatti@...hat.com
Subject: kvm broken with new vmap

Hello Nick,

KVM is currently broken upstream, starting with commit
db64fe02258f1507e13fe5212a989922323685ce (rewrite vmap layer)

The symptoms are some vmallocs from kvm fail.
cat /proc/meminfo shows this at the time of the fail:

VmallocTotal:     122880 kB
VmallocUsed:       15184 kB
VmallocChunk:      83764 kB

so there's plenty of space.

The allocation that fails seem to be 512 bytes long. I'm not
sure it always fails in there, but it seems so.


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