From: Andi Kleen <ak@suse.de>
To: Paul Jackson <pj@sgi.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>,
kenneth.w.chen@intel.com, linux-mm@kvack.org,
linux-ia64@vger.kernel.org
Subject: Re: [NUMA] Display and modify the memory policy of a process through /proc/<pid>/numa_policy
Date: Fri, 15 Jul 2005 13:46:16 +0200 [thread overview]
Message-ID: <20050715134616.43130b30@basil.nowhere.org> (raw)
In-Reply-To: <20050714230501.4a9df11e.pj@sgi.com>
On Thu, 14 Jul 2005 23:05:01 -0700
Paul Jackson <pj@sgi.com> wrote:
> Christoph wrote:
> > This is an implementation that deals with monitoring and managing running
> > processes.
>
> So is this patch roughly equivalent to adding a pid to the
> mbind/set_mempolicy/get_mempolicy system calls?
>
> Not that I am advocating for or against adding doing that. But this
> seems like alot of code, with new and exciting API details, just to
> add a pid argument, if such it be.
>
> Andi - could you remind us all why you chose not to have a pid argument
> in these calls?
Because of locking issues and I don't think external processes
should mess with virtual addresses of other processes. There is
just no way to do the later cleanly and race free.
I haven't seen the patch, but from the description it sounds wrong.
-Andi
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next prev parent reply other threads:[~2005-07-15 11:46 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-15 1:39 Christoph Lameter
2005-07-15 3:50 ` Paul Jackson
2005-07-15 4:52 ` Chen, Kenneth W
2005-07-15 5:07 ` Christoph Lameter
2005-07-15 5:55 ` Chen, Kenneth W
2005-07-15 6:05 ` Paul Jackson
2005-07-15 11:46 ` Andi Kleen [this message]
2005-07-15 16:06 ` Christoph Lameter
2005-07-15 21:04 ` Paul Jackson
2005-07-15 21:12 ` Andi Kleen
2005-07-15 21:20 ` Christoph Lameter
2005-07-15 21:47 ` Andi Kleen
2005-07-15 21:55 ` Christoph Lameter
2005-07-15 22:07 ` Andi Kleen
2005-07-15 22:30 ` Christoph Lameter
2005-07-15 22:37 ` Andi Kleen
2005-07-15 22:49 ` Christoph Lameter
2005-07-15 22:56 ` Andi Kleen
2005-07-15 23:11 ` Christoph Lameter
2005-07-15 23:44 ` Andi Kleen
2005-07-15 23:56 ` Christoph Lameter
2005-07-16 2:01 ` Andi Kleen
2005-07-16 15:14 ` Christoph Lameter
2005-07-16 22:39 ` Paul Jackson
2005-07-16 23:30 ` Paul Jackson
2005-07-17 1:55 ` Christoph Lameter
2005-07-17 3:50 ` Paul Jackson
2005-07-17 5:56 ` Christoph Lameter
2005-07-17 7:22 ` Paul Jackson
2005-07-17 3:21 ` Christoph Lameter
2005-07-17 4:51 ` Paul Jackson
2005-07-17 6:00 ` Christoph Lameter
2005-07-17 8:17 ` Paul Jackson
2005-07-16 0:00 ` David Singleton
2005-07-16 0:16 ` Steve Neuner
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