From: Ted Ts'o <tytso@mit.edu>
To: Eric Sandeen <sandeen@redhat.com>
Cc: Christoph Bartoschek <bartoschek@or.uni-bonn.de>,
linux-ext4@vger.kernel.org
Subject: Re: ext4_alloc_context occupies 150 GiB of memory and makes the system unusable
Date: Sat, 4 Dec 2010 22:11:30 -0500 [thread overview]
Message-ID: <20101205031130.GA4273@thunk.org> (raw)
In-Reply-To: <4CEA902F.9040706@redhat.com>
Christoph,
Have you been able to replicate this problem since rebooting your
machine. I've never seen anything quite like your report before.
If you do, a couple of questions. Which slab allocator are you using?
Are you using SLAB or SLUB? (grep for CONFIG_SLAB or CONFIG_SLUB in
your .config file).
If you are using SLUB, it would be useful to compile slubinfo.c (found
in /usr/src/linux/Documentation/vm/slabinfo.c) and send us the output
"slabinfo -a ext4_allocation_context" and "slabinfo -r
ext4_allocation_context".
Also, you might try "slabinfo -s" and see if that shrinks the slabs
for you. If this works, why it wasn't doing this automatically is
beyond me.
- Ted
next prev parent reply other threads:[~2010-12-05 3:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-22 12:23 ext4_alloc_context occupies 150 GiB of memory and makes the system unusable Christoph Bartoschek
2010-11-22 15:24 ` Eric Sandeen
2010-11-22 15:37 ` Christoph Bartoschek
2010-11-22 15:45 ` Eric Sandeen
2010-12-05 3:11 ` Ted Ts'o [this message]
2011-03-15 10:41 ` Sven
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