linux-kernel - How to find slab\'s usage?

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Message-Id: <200710120701.l9C71Jx6038998@www262.sakura.ne.jp>
Date:	Fri, 12 Oct 2007 16:01:19 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:	linux-kernel@...r.kernel.org
Subject: How to find slab\'s usage?

Hello.

I was compiling Ubuntu 7.10's kernel and I encountered OOM-killer.

I saw /proc/meminfo and it seems to me that slab is leaking memory.
But /usr/bin/slabtop claims /proc/slabinfo is missing.

I couldn't continue the compilation before reboot.
I could continue the compilation after reboot.
So, I think this is a memory leak.
How can I find slab that uses so much memory?

Regards.

# cat /proc/version
Linux version 2.6.22-14-server (buildd@...nadsky) (gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)) #1 SMP Wed Oct 10 06:35:59 GMT 2007

# cat /proc/meminfo
MemTotal:       515756 kB
MemFree:         24628 kB
Buffers:          1372 kB
Cached:          15324 kB
SwapCached:          0 kB
Active:          15140 kB
Inactive:         5936 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       515756 kB
LowFree:         24628 kB
SwapTotal:           0 kB
SwapFree:            0 kB
Dirty:              12 kB
Writeback:           8 kB
AnonPages:        4396 kB
Mapped:           1076 kB
Slab:           311236 kB
SReclaimable:    11268 kB
SUnreclaim:     299968 kB
PageTables:        264 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:    257876 kB
Committed_AS:     7780 kB
VmallocTotal:   511992 kB
VmallocUsed:      2204 kB
VmallocChunk:   509364 kB
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