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From: Andrew Morton <akpm@linux-foundation.org>
To: Nadia.Derbey@bull.net
Cc: linux-kernel@vger.kernel.org, y-goto@jp.fujitsu.com,
	linux-mm@kvack.org, containers@lists.linux-foundation.org,
	matthltc@us.ibm.com, cmm@us.ibm.com
Subject: Re: [PATCH 1/8] Scaling msgmni to the amount of lowmem
Date: Fri, 15 Feb 2008 21:59:16 -0800	[thread overview]
Message-ID: <20080215215916.8566d337.akpm@linux-foundation.org> (raw)
In-Reply-To: <20080211141813.354484000@bull.net>

On Mon, 11 Feb 2008 15:16:47 +0100 Nadia.Derbey@bull.net wrote:

> [PATCH 01/08]
> 
> This patch computes msg_ctlmni to make it scale with the amount of lowmem.
> msg_ctlmni is now set to make the message queues occupy 1/32 of the available
> lowmem.
> 
> Some cleaning has also been done for the MSGPOOL constant: the msgctl man page
> says it's not used, but it also defines it as a size in bytes (the code
> expresses it in Kbytes).
> 

Something's wrong here.  Running LTP's msgctl08 (specifically:
ltp-full-20070228) cripples the machine.  It's a 4-way 4GB x86_64.

http://userweb.kernel.org/~akpm/config-x.txt
http://userweb.kernel.org/~akpm/dmesg-x.txt

Normally msgctl08 will complete in a second or two.  With this patch I
don't know how long it will take to complete, and the machine is horridly
bogged down.  It does recover if you manage to kill msgctl08.  Feels like
a terrible memory shortage, but there's plenty of memory free and it isn't
swapping.


  reply	other threads:[~2008-02-16  6:00 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-11 14:16 [PATCH 0/8] Change default MSGMNI tunable to scale with lowmem (v3) Nadia.Derbey
2008-02-11 14:16 ` [PATCH 1/8] Scaling msgmni to the amount of lowmem Nadia.Derbey
2008-02-16  5:59   ` Andrew Morton [this message]
2008-02-18  9:19     ` Nadia Derbey
2008-02-18 13:08       ` Nadia Derbey
2008-02-19  8:50         ` [LTP] " Subrata Modak
2008-02-19 17:16           ` Nadia Derbey
2008-02-19 22:16             ` Matt Helsley
2008-02-21  8:39               ` Nadia Derbey
2008-02-21 12:36               ` Nadia Derbey
2008-02-21 13:02                 ` Nadia Derbey
2008-02-21 13:39                   ` Subrata Modak
2008-02-22  6:25                     ` Nadia Derbey
2008-02-22  8:41                       ` Subrata Modak
2008-02-20  9:44             ` Subrata Modak
2008-04-29 20:28   ` Tony Luck
2008-05-05  8:45     ` Nadia Derbey
2008-05-06 16:42       ` Luck, Tony
2008-05-06 18:05         ` Serge E. Hallyn
2008-05-07  5:37           ` Nadia Derbey
2008-05-07 13:17             ` Serge E. Hallyn
2008-05-07 18:12               ` Matt Helsley
2008-05-07  5:13         ` Nadia Derbey
2008-02-11 14:16 ` [PATCH 2/8] Scaling msgmni to the number of ipc namespaces Nadia.Derbey
2008-02-11 14:16 ` [PATCH 3/8] Defining the slab_memory_callback priority as a constant Nadia.Derbey
2008-02-11 14:16 ` [PATCH 4/8] Recomputing msgmni on memory add / remove Nadia.Derbey
2008-02-11 14:16 ` [PATCH 5/8] Invoke the ipcns notifier chain as a work item Nadia.Derbey
2008-02-11 14:16 ` [PATCH 6/8] Recomputing msgmni on ipc namespace creation/removal Nadia.Derbey
2008-02-11 14:16 ` [PATCH 7/8] Do not recompute msgmni anymore if explicitely set by user Nadia.Derbey
2008-02-11 20:24   ` Andrew Morton
2008-02-12  9:32     ` Nadia Derbey
2008-02-12  9:44       ` Andrew Morton
2008-02-12 15:15         ` Nadia Derbey
2008-02-12 19:44           ` Andrew Morton
2008-02-14 11:47             ` Nadia Derbey
2008-02-12  9:45       ` Nadia Derbey
2008-02-11 14:16 ` [PATCH 8/8] Re-enable msgmni automatic recomputing msgmni if set to negative Nadia.Derbey
2008-02-11 20:27   ` Andrew Morton
2008-02-12 11:38     ` Nadia Derbey
2008-05-20 14:28 [PATCH 1/8] Scaling msgmni to the amount of lowmem Michael Kerrisk
2008-05-20 14:45 ` Nadia Derbey
2008-05-20 14:56   ` Michael Kerrisk
2008-05-21 10:47   ` Michael Kerrisk

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