linux-kernel - Re: ipc,sem: sysv semaphore scalability

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Message-ID: <CA+i8gKKK_VxZtyyp1tqHnztd4++XyNXwbEEr-A29-J23PyuCfQ@mail.gmail.com>
Date:	Fri, 22 Mar 2013 18:04:33 +0700
From:	Emmanuel Benisty <benisty.e@...il.com>
To:	Rik van Riel <riel@...riel.com>
Cc:	torvalds@...ux-foundation.org, davidlohr.bueso@...com,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	hhuang@...hat.com, jason.low2@...com, walken@...gle.com,
	lwoodman@...hat.com, chegu_vinod@...com
Subject: Re: ipc,sem: sysv semaphore scalability

Hi Rik,

On Thu, Mar 21, 2013 at 2:55 AM, Rik van Riel <riel@...riel.com> wrote:
> This series makes the sysv semaphore code more scalable,
> by reducing the time the semaphore lock is held, and making
> the locking more scalable for semaphore arrays with multiple
> semaphores.

I was trying your patchset and my machine died while building a
package. I could reproduce the bug the (only) two times I tried.
There's a poor quality picture here: http://i.imgur.com/MuYuyQC.jpg

Thanks.
-- Emmanuel
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