From: Christoph Lameter <clameter@sgi.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Daniel Phillips <phillips@phunq.net>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, dkegel@google.com,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
David Miller <davem@davemloft.net>
Subject: Re: [RFC 0/3] Recursive reclaim (on __PF_MEMALLOC)
Date: Mon, 10 Sep 2007 12:29:32 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0709101225350.24735@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070905121937.GA9246@wotan.suse.de>
On Wed, 5 Sep 2007, Nick Piggin wrote:
> Implementation issues aside, the problem is there and I would like to
> see it fixed regardless if some/most/or all users in practice don't
> hit it.
I am all for fixing the problem but the solution can be much simpler and
more universal. F.e. the amount of tcp data in flight may be controlled
via some limit so that other subsystems can continue to function even if
we are overwhelmed by network traffic. Peter's approach establishes the
limit by failing PF_MEMALLOC allocations. If that occurs then other
subsystems (like the disk, or even fork/exec or memory management
allocation) will no longer operate since their allocations no longer
succeed which will make the system even more fragile and may lead to
subsequent failures.
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next prev parent reply other threads:[~2007-09-10 19:29 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-14 14:21 [RFC 0/3] Recursive reclaim (on __PF_MEMALLOC) Christoph Lameter
2007-08-14 14:21 ` [RFC 1/3] Allow reclaim via __GFP_NOMEMALLOC reclaim Christoph Lameter
2007-08-14 14:21 ` [RFC 2/3] Use NOMEMALLOC reclaim to allow reclaim if PF_MEMALLOC is set Christoph Lameter
2007-08-14 14:21 ` [RFC 3/3] Test code for PF_MEMALLOC reclaim Christoph Lameter
2007-08-14 14:36 ` [RFC 0/3] Recursive reclaim (on __PF_MEMALLOC) Peter Zijlstra
2007-08-14 15:29 ` Christoph Lameter
2007-08-14 19:32 ` Peter Zijlstra
2007-08-14 19:41 ` Christoph Lameter
2007-08-15 12:22 ` Nick Piggin
2007-08-15 13:12 ` Peter Zijlstra
2007-08-15 14:15 ` Andi Kleen
2007-08-15 13:55 ` Peter Zijlstra
2007-08-15 14:34 ` Andi Kleen
2007-08-15 20:32 ` Christoph Lameter
2007-08-15 20:29 ` Christoph Lameter
2007-08-16 3:29 ` Nick Piggin
2007-08-16 20:27 ` Christoph Lameter
2007-08-20 3:51 ` Peter Zijlstra
2007-08-20 19:15 ` Christoph Lameter
2007-08-21 0:32 ` Nick Piggin
2007-08-21 0:28 ` Nick Piggin
2007-08-21 15:29 ` Peter Zijlstra
2007-08-23 3:02 ` Nick Piggin
2007-09-12 22:39 ` Christoph Lameter
2007-09-05 9:20 ` Daniel Phillips
2007-09-05 10:42 ` Christoph Lameter
2007-09-05 11:42 ` Nick Piggin
2007-09-05 12:14 ` Christoph Lameter
2007-09-05 12:19 ` Nick Piggin
2007-09-10 19:29 ` Christoph Lameter [this message]
2007-09-10 19:37 ` Peter Zijlstra
2007-09-10 19:41 ` Christoph Lameter
2007-09-10 19:55 ` Peter Zijlstra
2007-09-10 20:17 ` Christoph Lameter
2007-09-10 20:48 ` Peter Zijlstra
2007-09-11 7:41 ` Nick Piggin
2007-09-12 10:52 ` Peter Zijlstra
2007-09-12 22:47 ` Christoph Lameter
2007-09-13 8:19 ` Peter Zijlstra
2007-09-13 18:32 ` Christoph Lameter
2007-09-13 19:24 ` Peter Zijlstra
2007-09-05 16:16 ` Daniel Phillips
2007-09-08 5:12 ` Mike Snitzer
2007-09-18 0:28 ` Daniel Phillips
2007-09-18 3:27 ` Mike Snitzer
2007-09-18 9:30 ` Peter Zijlstra
[not found] ` <200709172211.26493.phillips@phunq.net>
2007-09-18 8:11 ` Wouter Verhelst
2007-09-18 9:58 ` Peter Zijlstra
2007-09-18 16:56 ` Daniel Phillips
2007-09-18 19:16 ` Peter Zijlstra
2007-09-18 18:40 ` Daniel Phillips
2007-09-18 20:13 ` Mike Snitzer
2007-09-10 19:25 ` Christoph Lameter
2007-09-10 19:55 ` Peter Zijlstra
2007-09-10 20:22 ` Christoph Lameter
2007-09-10 20:48 ` Peter Zijlstra
2007-10-26 17:44 ` Pavel Machek
2007-10-26 17:55 ` Christoph Lameter
2007-10-27 22:58 ` Daniel Phillips
2007-10-27 23:08 ` Daniel Phillips
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