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From: Lukas Hejtmanek <xhejtman@hell.sks3.muni.cz>
To: Nick Piggin <piggin@cyberone.com.au>
Cc: Andrew Morton <akpm@osdl.org>,
	zaphodb@zaphods.net, marcelo.tosatti@cyclades.com,
	linux-kernel@vger.kernel.org
Subject: Re: Kernel 2.6.9 Multiple Page Allocation Failures
Date: Thu, 9 Dec 2004 11:37:47 +0100	[thread overview]
Message-ID: <20041209103747.GC15537@mail.muni.cz> (raw)
In-Reply-To: <41B82909.4040302@cyberone.com.au>

On Thu, Dec 09, 2004 at 09:29:29PM +1100, Nick Piggin wrote:
> Perhaps they weren't working properly in 2.6.6, or something else is 
> buggy in
> 2.6.9. 16MB in 2.6.9 should definitely give a a larger atomic reserve 
> than 900K
> in 2.6.6... so if it isn't an issue with network buffer behaviour, then the
> only other possibility AFAIKS is that page reclaim latency or efficiency has
> got much worse. This would be unlikely as it should cause problems and
> regressions on other workloads.

Increasing TCP buffers in 2.6.6 works somehow because it eliminates high RTT
over the large distance.

Here is exaclty what I do:
/sbin/sysctl -w net/core/rmem_max=8388608
/sbin/sysctl -w net/core/wmem_max=8388608
/sbin/sysctl -w net/core/rmem_default=1048576
/sbin/sysctl -w net/core/wmem_default=1048576
/sbin/sysctl -w net/ipv4/tcp_window_scaling=1
/sbin/sysctl -w net/ipv4/tcp_rmem="4096 1048576 8388608"
/sbin/sysctl -w net/ipv4/tcp_wmem="4096 1048576 8388608"
echo 32768 > /proc/sys/vm/min_free_kbytes
/sbin/ifconfig eth0 txqueuelen 1000

-- 
Lukáš Hejtmánek

  reply	other threads:[~2004-12-09 10:38 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-11-03 22:24 Kernel 2.6.9 Multiple Page Allocation Failures (Part 2) Stefan Schmidt
2004-11-04 12:17 ` Marcelo Tosatti
2004-11-04 18:18   ` Stefan Schmidt
2004-11-09 16:41     ` Kernel 2.6.9 Multiple Page Allocation Failures Marcelo Tosatti
2004-11-09 22:35       ` Lukas Hejtmanek
2004-11-09 22:46         ` Andrew Morton
2004-11-09 22:44           ` Lukas Hejtmanek
2004-11-09 20:33             ` Marcelo Tosatti
2004-11-10 20:35               ` Lukas Hejtmanek
2004-11-10 21:09                 ` Andrew Morton
2004-11-10 21:24                   ` Lukas Hejtmanek
2004-11-10 21:47                     ` Andrew Morton
2004-11-10 21:28               ` Lukas Hejtmanek
2004-11-10 18:11                 ` Marcelo Tosatti
2004-11-11  1:04                   ` Lukas Hejtmanek
2004-11-11 21:44                   ` Lukas Hejtmanek
2004-11-12 12:09                     ` Nick Piggin
2004-11-13 14:47                       ` Stefan Schmidt
2004-11-16  9:33                         ` Marcelo Tosatti
2004-11-16 17:05                           ` Lukas Hejtmanek
2004-11-21  1:43                             ` Stefan Schmidt
2004-11-21  2:42                               ` Stefan Schmidt
2004-12-02 19:54                                 ` Lukas Hejtmanek
2004-12-02 20:25                                   ` Andrew Morton
2004-12-02 21:03                                     ` Lukas Hejtmanek
2004-12-02 22:31                                       ` Stefan Schmidt
2004-12-02 22:48                                         ` Lukas Hejtmanek
2004-12-02 22:56                                         ` Andrew Morton
2004-12-02 23:18                                           ` Lukas Hejtmanek
2004-12-03  0:18                                             ` Andrew Morton
2004-12-03 12:11                                               ` Lukas Hejtmanek
2004-12-03 12:17                                                 ` Lukas Hejtmanek
2004-12-07 22:52                                                 ` Nick Piggin
2004-12-07 22:59                                                   ` Lukas Hejtmanek
2004-12-07 23:05                                                     ` Nick Piggin
2004-12-08 11:18                                                       ` Lukas Hejtmanek
2004-12-08 11:23                                                         ` Nick Piggin
2004-12-08 11:46                                                           ` Lukas Hejtmanek
2004-12-08 13:14                                                           ` Lukas Hejtmanek
2004-12-09  8:52                                                             ` Nick Piggin
2004-12-09  9:02                                                               ` Lukas Hejtmanek
2004-12-09 10:29                                                                 ` Nick Piggin
2004-12-09 10:37                                                                   ` Lukas Hejtmanek [this message]
2004-12-03  6:18                                           ` Nathan Scott
2004-12-03  7:06                                             ` Andrew Morton
2004-12-07 11:17                                             ` Lukas Hejtmanek
2004-12-08  0:15                                               ` Nathan Scott
2004-12-08  0:36                                                 ` Lukas Hejtmanek
2004-12-03 10:35                                           ` Christoph Hellwig
2004-12-03 10:58                                     ` P
2004-12-03 17:11                                       ` Andrew Morton
2004-11-09 23:52           ` Stefan Schmidt
2004-11-10  1:27             ` 2.6.10-rc1-mm4 -1 EAGAIN after allocation failure was: " Stefan Schmidt
2004-11-10  1:39               ` Andrew Morton
2004-11-10  2:03                 ` Stefan Schmidt
2004-11-10  2:21                   ` Andrew Morton
2004-11-10  4:24                   ` Nick Piggin
2004-11-10 10:28                     ` Stefan Schmidt
2004-11-10 12:06                       ` Stefan Schmidt
2004-11-10  8:58                         ` Marcelo Tosatti
2004-11-10 12:48                           ` Stefan Schmidt
2004-11-10 10:56                             ` Marcelo Tosatti
2004-11-11  1:23                             ` Nick Piggin
2004-11-11 18:31                               ` jhigdon

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