From: "Chris Friesen" <cfriesen@nortel.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <clameter@sgi.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/8] Allow huge page allocations to use GFP_HIGH_MOVABLE
Date: Fri, 26 Jan 2007 12:35:30 -0600 [thread overview]
Message-ID: <45BA49F2.2000804@nortel.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0701261747290.23091@skynet.skynet.ie>
Mel Gorman wrote:
> Worse, the problem is to have high order contiguous blocks free at the
> time of allocation without reclaim or migration. If the allocations were
> not atomic, anti-fragmentation as it is today would be enough.
Has anyone looked at marking the buffers as "needs refilling" then kick
off a kernel thread or something to do the allocations under GFP_KERNEL?
That way we avoid having to allocate the buffers with GFP_ATOMIC.
I seem to recall that the tulip driver used to do this. Is it just too
complicated from a race condition standpoint?
We currently see this issue on our systems, as we have older e1000
hardware with 9KB jumbo frames. After a while we just fail to allocate
buffers and the system goes belly-up.
Chris
WARNING: multiple messages have this Message-ID (diff)
From: "Chris Friesen" <cfriesen@nortel.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <clameter@sgi.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/8] Allow huge page allocations to use GFP_HIGH_MOVABLE
Date: Fri, 26 Jan 2007 12:35:30 -0600 [thread overview]
Message-ID: <45BA49F2.2000804@nortel.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0701261747290.23091@skynet.skynet.ie>
Mel Gorman wrote:
> Worse, the problem is to have high order contiguous blocks free at the
> time of allocation without reclaim or migration. If the allocations were
> not atomic, anti-fragmentation as it is today would be enough.
Has anyone looked at marking the buffers as "needs refilling" then kick
off a kernel thread or something to do the allocations under GFP_KERNEL?
That way we avoid having to allocate the buffers with GFP_ATOMIC.
I seem to recall that the tulip driver used to do this. Is it just too
complicated from a race condition standpoint?
We currently see this issue on our systems, as we have older e1000
hardware with 9KB jumbo frames. After a while we just fail to allocate
buffers and the system goes belly-up.
Chris
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next prev parent reply other threads:[~2007-01-26 18:56 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-25 23:44 [PATCH 0/8] Create ZONE_MOVABLE to partition memory between movable and non-movable pages Mel Gorman
2007-01-25 23:44 ` Mel Gorman
2007-01-25 23:45 ` [PATCH 1/8] Add __GFP_MOVABLE for callers to flag allocations that may be migrated Mel Gorman
2007-01-25 23:45 ` Mel Gorman
2007-01-26 12:27 ` Nick Piggin
2007-01-26 12:27 ` Nick Piggin
2007-01-26 13:25 ` Mel Gorman
2007-01-26 13:25 ` Mel Gorman
2007-01-25 23:45 ` [PATCH 2/8] Create the ZONE_MOVABLE zone Mel Gorman
2007-01-25 23:45 ` Mel Gorman
2007-01-26 16:28 ` Christoph Lameter
2007-01-26 16:28 ` Christoph Lameter
2007-01-26 16:49 ` Mel Gorman
2007-01-26 16:49 ` Mel Gorman
2007-01-29 17:28 ` Mel Gorman
2007-01-29 17:28 ` Mel Gorman
2007-01-26 17:16 ` Christoph Lameter
2007-01-26 17:16 ` Christoph Lameter
2007-01-26 17:24 ` Mel Gorman
2007-01-26 17:24 ` Mel Gorman
2007-01-26 17:25 ` Christoph Lameter
2007-01-26 17:25 ` Christoph Lameter
2007-01-26 17:38 ` Mel Gorman
2007-01-26 17:38 ` Mel Gorman
2007-01-29 17:31 ` Mel Gorman
2007-01-29 17:31 ` Mel Gorman
2007-01-25 23:45 ` [PATCH 3/8] Allow huge page allocations to use GFP_HIGH_MOVABLE Mel Gorman
2007-01-25 23:45 ` Mel Gorman
2007-01-26 16:33 ` Christoph Lameter
2007-01-26 16:33 ` Christoph Lameter
2007-01-26 16:58 ` Mel Gorman
2007-01-26 16:58 ` Mel Gorman
2007-01-26 17:04 ` Christoph Lameter
2007-01-26 17:04 ` Christoph Lameter
2007-01-26 17:20 ` Mel Gorman
2007-01-26 17:20 ` Mel Gorman
2007-01-26 17:22 ` Christoph Lameter
2007-01-26 17:22 ` Christoph Lameter
2007-01-26 17:37 ` Mel Gorman
2007-01-26 17:37 ` Mel Gorman
2007-01-26 17:45 ` Christoph Lameter
2007-01-26 17:45 ` Christoph Lameter
2007-01-26 17:53 ` Mel Gorman
2007-01-26 17:53 ` Mel Gorman
2007-01-26 18:20 ` Christoph Lameter
2007-01-26 18:20 ` Christoph Lameter
2007-01-26 20:37 ` Mel Gorman
2007-01-26 20:37 ` Mel Gorman
2007-01-26 18:35 ` Chris Friesen [this message]
2007-01-26 18:35 ` Chris Friesen
2007-01-26 20:44 ` Mel Gorman
2007-01-26 20:44 ` Mel Gorman
2007-01-26 21:37 ` Chris Friesen
2007-01-26 21:37 ` Chris Friesen
2007-01-25 23:46 ` [PATCH 4/8] x86 - Specify amount of kernel memory at boot time Mel Gorman
2007-01-25 23:46 ` Mel Gorman
2007-01-25 23:46 ` [PATCH 5/8] ppc and powerpc " Mel Gorman
2007-01-25 23:46 ` Mel Gorman
2007-01-25 23:46 ` [PATCH 6/8] x86_64 " Mel Gorman
2007-01-25 23:46 ` Mel Gorman
2007-01-25 23:47 ` [PATCH 7/8] ia64 " Mel Gorman
2007-01-25 23:47 ` Mel Gorman
2007-01-25 23:47 ` [PATCH 8/8] Add documentation for additional boot parameter and sysctl Mel Gorman
2007-01-25 23:47 ` Mel Gorman
2007-01-26 11:07 ` [PATCH 0/8] Create ZONE_MOVABLE to partition memory between movable and non-movable pages Andrew Morton
2007-01-26 11:07 ` Andrew Morton
2007-01-26 14:29 ` Mel Gorman
2007-01-26 14:29 ` Mel Gorman
2007-01-26 16:01 ` Christoph Lameter
2007-01-26 16:01 ` Christoph Lameter
2007-01-26 15:56 ` Christoph Lameter
2007-01-26 15:56 ` Christoph Lameter
2007-01-26 19:46 ` Andrew Morton
2007-01-26 19:46 ` Andrew Morton
2007-01-26 19:58 ` Christoph Lameter
2007-01-26 19:58 ` Christoph Lameter
2007-01-26 20:27 ` Andrew Morton
2007-01-26 20:27 ` Andrew Morton
2007-01-29 21:54 ` Christoph Lameter
2007-01-29 21:54 ` Christoph Lameter
2007-01-29 22:36 ` Andrew Morton
2007-01-29 22:36 ` Andrew Morton
2007-01-29 22:45 ` Christoph Lameter
2007-01-29 22:45 ` Christoph Lameter
2007-01-29 22:50 ` Russell King
2007-01-29 22:50 ` Russell King
2007-01-29 23:37 ` Christoph Lameter
2007-01-29 23:37 ` Christoph Lameter
2007-01-30 0:09 ` Andrew Morton
2007-01-30 0:09 ` Andrew Morton
2007-01-30 9:53 ` Peter Zijlstra
2007-01-30 9:53 ` Peter Zijlstra
2007-02-02 5:27 ` Christoph Lameter
2007-02-02 5:27 ` Christoph Lameter
2007-02-02 5:22 ` Christoph Lameter
2007-02-02 5:22 ` Christoph Lameter
2007-01-26 16:21 ` Christoph Lameter
2007-01-26 16:21 ` Christoph Lameter
2007-01-26 16:48 ` Mel Gorman
2007-01-26 16:48 ` Mel Gorman
2007-01-26 17:02 ` Christoph Lameter
2007-01-26 17:02 ` Christoph Lameter
2007-01-26 17:20 ` Mel Gorman
2007-01-26 17:20 ` Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2007-03-01 10:08 [PATCH 0/8] Create optional ZONE_MOVABLE to partition memory between movable and non-movable pages v2 Mel Gorman
2007-03-01 10:09 ` [PATCH 3/8] Allow huge page allocations to use GFP_HIGH_MOVABLE Mel Gorman
2007-03-01 10:09 ` Mel Gorman
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