linux-kernel - 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second

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Message-ID: <201005121121.49135.tvrtko.ursulin@sophos.com>
Date:	Wed, 12 May 2010 11:21:48 +0100
From:	Tvrtko Ursulin <tvrtko.ursulin@...hos.com>
To:	<linux-kernel@...r.kernel.org>
Subject: 2.6.33.2 kmalloc-8 slab leaks ~512 objects per second


Hi all,

As the subject says, is this a know issue? I have been tracking the growth at
one second intervals and it looks like this:

512 (67716608) Slab:             606744 kB
512 (67717120) Slab:             606752 kB
512 (67717632) Slab:             606756 kB
0 (67718144) Slab:             606756 kB
512 (67718144) Slab:             606760 kB
1024 (67718656) Slab:             606768 kB
512 (67719680) Slab:             606772 kB
512 (67720192) Slab:             606776 kB
0 (67720704) Slab:             606776 kB
512 (67720704) Slab:             606780 kB

First fiels is the diff in numobj, in parentheses is actual numobj and last is
the total slab size from /proc/meminfo.

kmalloc-8         68044800 68044800      8  512    1 : tunables    0    0    0
: slabdata 132900 132900      0

dm-io slab also seems large, don't know... :
dm_io              75924 147288     40  102    1 : tunables    0    0    0 :
slabdata   1444   1444      0

Some other info about the system/kernel is attached.

Tvrtko



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View attachment "lsmod" of type "text/plain" (3728 bytes)

Download attachment "dmesg.gz" of type "application/x-gzip" (17684 bytes)

Download attachment "config.gz" of type "application/x-gzip" (14670 bytes)

Download attachment "slabinfo" of type "application/x-zerosize" (9536 bytes)