From: Alan <alan@lxorguk.ukuu.org.uk>
To: "Kunal Trivedi" <ktrivedi@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Possible Bug in VM accounting (Committed_AS) on x86_64 architecture ?
Date: Wed, 29 Nov 2006 21:04:08 +0000 [thread overview]
Message-ID: <20061129210408.3ea5800a@localhost.localdomain> (raw)
In-Reply-To: <63a95c50611291129q109abeb2o7e5afb7ca94a3f2c@mail.gmail.com>
> I have noticed that 64 bit machine with overcommit policy (as above)
> starts giving problem within 3-4 weeks. To prove that I've written
> small program.
The older RHEL kernels had some cases that didn't quite account exactly
but current ones ought to be right - for Centos I'd expect similar but
ask there not here as it is a very old and branched away kernel.
> It allocates memory of different sizes (not that it matters much due
> to caching of diffeent malloc. I am using standard ptmalloc). Sizes
> are 16B, 32B, 64B, 256B, 1024B, 57B, 127B and so on... . Then it
> touches that memory (memset) and then free it. These operations are
> being performed in while(1) loop.
I would expect that, it's fragmentation. The real test is whether the
values go back properly when you kill the program.
next prev parent reply other threads:[~2006-11-29 20:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <63a95c50611291122l27c9af6fha78db3bf32fe6c1c@mail.gmail.com>
2006-11-29 19:29 ` Possible Bug in VM accounting (Committed_AS) on x86_64 architecture ? Kunal Trivedi
2006-11-29 21:04 ` Alan [this message]
2006-12-07 7:26 Kunal Trivedi
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