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From: Andi Kleen <andi@firstfloor.org>
To: Eyal Lotem <eyal.lotem@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] Using "page credits" as a solution for common thrashing  scenarios
Date: Tue, 24 Nov 2009 22:15:29 +0100	[thread overview]
Message-ID: <87aaybwrny.fsf@basil.nowhere.org> (raw)
In-Reply-To: <b64f365b0911171252q42a0c102jddb2cd29af64a7a7@mail.gmail.com> (Eyal Lotem's message of "Tue, 17 Nov 2009 22:52:51 +0200")

Eyal Lotem <eyal.lotem@gmail.com> writes:

Replying to an old email.

>   * I think it is wrong for the kernel to evict the 15 pages of the bash,
>     xterm, X server's working set, as an example, in order for a
>     misbehaving process to have 1000015 instead of 1000000 pages in its
>     working set. EVEN if that misbehaving process is accessing its working
>     set far more aggressively.

One problem in practice tends to be that it's hard to realiably detect
that a process is misbehaving. The 1000000 page process might be your
critical database, while the 15 page process is something very
unimportant.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.

  parent reply	other threads:[~2009-11-24 21:15 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-17 20:52 [RFC] Using "page credits" as a solution for common thrashing scenarios Eyal Lotem
2009-11-17 21:08 ` Rik van Riel
2009-11-17 21:19   ` Eyal Lotem
2009-11-24 21:15 ` Andi Kleen [this message]
2009-11-24 22:39   ` Chris Friesen
2010-06-08  9:45   ` Eyal Lotem

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