linux-kernel - Re: [PATCH 1/2] ipc semaphores: reduce ipc

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Message-ID: <4BC73FC9.1090007@colorfullife.com>
Date:	Thu, 15 Apr 2010 18:33:13 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Chris Mason <chris.mason@...cle.com>,
	Nick Piggin <npiggin@...e.de>, zach.brown@...cle.com,
	jens.axboe@...cle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ipc semaphores: reduce ipc_lock contention in semtimedop

On 04/14/2010 09:50 PM, Chris Mason wrote:
> On a big system I saw about 4000 semaphores total.  The database will
> just allocate as many as it can into a single array and keep creating
> arrays until it has all it needs.
>
>    
What happens if SEMMSL is reduced (first entry in /proc/sys/kernel/sem)?

--
     Manfred
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