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From: Pavel Machek <pavel@ucw.cz>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linux-mm@kvack.org, David Miller <davem@davemloft.net>
Subject: Re: [PATCH 0/9] VM deadlock avoidance -v10
Date: Wed, 17 Jan 2007 10:12:06 +0100	[thread overview]
Message-ID: <20070117091206.GA9845@elf.ucw.cz> (raw)
In-Reply-To: <20070116094557.494892000@taijtu.programming.kicks-ass.net>

Hi!

> These patches implement the basic infrastructure to allow swap over networked
> storage.
> 
> The basic idea is to reserve some memory up front to use when regular memory
> runs out.
> 
> To bound network behaviour we accept only a limited number of concurrent 
> packets and drop those packets that are not aimed at the connection(s) servicing
> the VM. Also all network paths that interact with userspace are to be avoided - 
> e.g. taps and NF_QUEUE.
> 
> PF_MEMALLOC is set when processing emergency skbs. This makes sense in that we
> are indeed working on behalf of the swapper/VM. This allows us to use the 
> regular memory allocators for processing but requires that said processing have
> bounded memory usage and has that accounted in the reserve.

How does it work with ARP, for example? You still need to reply to ARP
if you want to keep your ethernet connections.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  parent reply	other threads:[~2007-01-17  9:12 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-16  9:45 Peter Zijlstra
2007-01-16  9:45 ` [PATCH 1/9] mm: page allocation rank Peter Zijlstra
2007-01-16  9:45 ` [PATCH 2/9] mm: slab allocation fairness Peter Zijlstra
2007-01-16  9:46 ` [PATCH 3/9] mm: allow PF_MEMALLOC from softirq context Peter Zijlstra
2007-01-16  9:46 ` [PATCH 4/9] mm: serialize access to min_free_kbytes Peter Zijlstra
2007-01-16  9:46 ` [PATCH 5/9] mm: emergency pool Peter Zijlstra
2007-01-16  9:46 ` [PATCH 6/9] mm: __GFP_EMERGENCY Peter Zijlstra
2007-01-16  9:46 ` [PATCH 7/9] mm: allow mempool to fall back to memalloc reserves Peter Zijlstra
2007-01-16  9:46 ` [PATCH 8/9] slab: kmem_cache_objs_to_pages() Peter Zijlstra
2007-01-16  9:46 ` [PATCH 9/9] net: vm deadlock avoidance core Peter Zijlstra
2007-01-16 13:25   ` Evgeniy Polyakov
2007-01-16 13:47     ` Peter Zijlstra
2007-01-16 15:33       ` Evgeniy Polyakov
2007-01-16 16:08         ` Peter Zijlstra
2007-01-17  4:54           ` Evgeniy Polyakov
2007-01-17  9:07             ` Peter Zijlstra
2007-01-18 10:41               ` Evgeniy Polyakov
2007-01-18 12:18                 ` Peter Zijlstra
2007-01-18 13:58                   ` Possible ways of dealing with OOM conditions Evgeniy Polyakov
2007-01-18 15:10                     ` Peter Zijlstra
2007-01-18 15:50                       ` Evgeniy Polyakov
2007-01-18 17:31                         ` Peter Zijlstra
2007-01-18 18:34                           ` Evgeniy Polyakov
2007-01-19 12:53                             ` Peter Zijlstra
2007-01-19 22:56                               ` Evgeniy Polyakov
2007-01-20 22:36                                 ` Rik van Riel
2007-01-21  1:46                                   ` Evgeniy Polyakov
2007-01-21  2:14                                     ` Evgeniy Polyakov
2007-01-21 16:30                                     ` Rik van Riel
2007-01-19 17:54                           ` Christoph Lameter
2007-01-17  9:12 ` Pavel Machek [this message]
2007-01-17  9:20   ` [PATCH 0/9] VM deadlock avoidance -v10 Peter Zijlstra

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