Date: Wed, 26 Jan 2005 00:44:19 -0800
From: Andrew Morton <akpm@osdl.org>
To: Jens Axboe <axboe@suse.de>
Cc: torvalds@osdl.org, alexn@dsv.su.se, kas@fi.muni.cz,
       linux-kernel@vger.kernel.org, lennert.vanalboom@ugent.be
Subject: Re: Memory leak in 2.6.11-rc1?
Message-Id: <20050126004419.26aab4a5.akpm@osdl.org>
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Jens Axboe <axboe@suse.de> wrote:
>
> On Wed, Jan 26 2005, Andrew Morton wrote:
> > Jens Axboe <axboe@suse.de> wrote:
> > >
> > > But the 2.6.11-rcX vm is still very
> > >  screwy, to get something close to nice and smooth behaviour I have to
> > >  run a fillmem every now and then to reclaim used memory.
> > 
> > Can you provide more details?
> 
> Hmm not really, I just seem to have a very large piece of
> non-cache/buffer memory that seems reluctant to shrink on light memory
> pressure.

If it's not pagecache then what is it? slab?

> This makes the box feel sluggish, if I force reclaim by
> running fillmem and swapping on/off again, it feels much better.

before-n-after /proc/meminfo would be interesting.

If you actually meant that is _is_ sticky pagecache then perhaps the recent
mark_page_accessed() changes in filemap.c, although I'd be surprised.

> I should mention that this is with 2.6.bk + andreas oom patches that he
> asked me to test. I can try 2.6.11-rc2-bkX if you think I should.

They shouldn't be causing this sort of thing.
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