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Date: Fri, 15 Feb 2008 21:59:16 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: Nadia.Derbey@...l.net Cc: linux-kernel@...r.kernel.org, y-goto@...fujitsu.com, linux-mm@...ck.org, containers@...ts.linux-foundation.org, matthltc@...ibm.com, cmm@...ibm.com Subject: Re: [PATCH 1/8] Scaling msgmni to the amount of lowmem On Mon, 11 Feb 2008 15:16:47 +0100 Nadia.Derbey@...l.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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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