From: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Christoph Lameter <clameter@sgi.com>, Andi Kleen <ak@suse.de>,
linux-mm <linux-mm@kvack.org>
Subject: Re: Regression in 2.6.18-rc2-mm1: mbind() not binding
Date: Wed, 02 Aug 2006 16:28:11 -0400 [thread overview]
Message-ID: <1154550491.5145.111.camel@localhost> (raw)
In-Reply-To: <1154534801.5145.69.camel@localhost>
On Wed, 2006-08-02 at 12:06 -0400, Lee Schermerhorn wrote:
> Just a heads up: it appears that mbind() does not work--e.g. on
> anonymous pages--in 2.6.18-rc2-mm1.
>
> Found with my memtoy tool, available at:
> http://free.linux.hp.com/~lts/Tools/memtoy-latest.tar.gz
>
> Requires a NUMA platform or fakenuma kernel to see this. I'm not sure
> yet whether the specified policy is not being installed, or it's just
> being ignored at allocation time. Note that default policy works: when
> I change the cpu/node affinity of the test, allocation tracks to new
> node. This indicates that get_mempolicy(..., MPOL_F_NODE|MPOL_F_ADDR)
> isn't lying to me.
>
> Works in 2.6.18-rc2. I've just grabbed the broken out series, and will
> attempt to isolate the patch. If anyone else has come across this and
> already knows what's causing it--that would save me some effort.
Update: looks like only the MPOL_BIND policy is affected. Preferred
and Interleaved seem to work. Maybe something to do with zone lists?
Still investigating.
Lee
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prev parent reply other threads:[~2006-08-02 20:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-02 16:06 Regression in 2.6.18-rc2-mm1: mbind() not binding Lee Schermerhorn
2006-08-02 20:28 ` Lee Schermerhorn [this message]
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