From: Paul Jackson <pj@sgi.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: bas.westerbaan@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: Conveying memory pressure to userspace?
Date: Fri, 11 May 2007 13:48:52 -0700 [thread overview]
Message-ID: <20070511134852.86b70cd1.pj@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0705111005200.32716@schroedinger.engr.sgi.com>
Christoph wrote:
> cpusets export a notion of memory pressure to user space. See the cpusets
> documentation.
If the special cpuset file 'memory_pressure_enabled' is turned on (echo
'1' to it) in the top cpuset, then the special cpuset file
'memory_pressure' that is in all cpusets provides a measure of the rate
of recent page allocation requests by tasks in each cpuset that were
not easily granted off the free list, requiring more aggressive kernel
effort to free up some pages to meet the request.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401
prev parent reply other threads:[~2007-05-11 20:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-11 0:56 Conveying memory pressure to userspace? Bas Westerbaan
2007-05-11 1:54 ` Martin J. Bligh
2007-05-11 10:00 ` Bas Westerbaan
2007-05-11 17:05 ` Christoph Lameter
2007-05-11 20:48 ` Paul Jackson [this message]
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