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From: Andrew Morton <akpm@zip.com.au>
To: Daniel Phillips <phillips@arcor.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Race in shrink_cache
Date: Thu, 05 Sep 2002 00:53:27 -0700	[thread overview]
Message-ID: <3D770D77.BF85645E@zip.com.au> (raw)
In-Reply-To: E17mr4K-000660-00@starship

Daniel Phillips wrote:
> 
> ...
> You said something about your lru locking strategy in 2.5.33-mm2.  I have not
> reverse engineered it yet, would you care to wax poetic?

I'm not sure what you're after here?  Strategy is to make the locks per-zone,
per-node, to not take them too long, to not take them too frequently, to do
as much *needed* work as possible for a single acquisition of the lock and
to not do unnecessary work while holding it - and that includes not servicing
ethernet interrupts.

Not having to bump page counts when moving pages from the LRU into a private
list would be nice.

The strategy for fixing the double-free race is to wait until you
buy an IDE disk ;)

The elaborate changelogs are at

http://linux.bkbits.net:8080/linux-2.5/user=akpm/ChangeSet@-4w?nav=!-|index.html|stats|!+|index.html

  reply	other threads:[~2002-09-05  7:36 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-05  5:04 Race in shrink_cache Daniel Phillips
2002-09-05  6:36 ` Andrew Morton
2002-09-05  6:36   ` Daniel Phillips
2002-09-05  7:07     ` Andrew Morton
2002-09-05  7:28       ` Daniel Phillips
2002-09-05  7:53         ` Andrew Morton [this message]
2002-09-05 18:41           ` Daniel Phillips
2002-09-05 18:51             ` Andrew Morton
2002-09-05 19:08               ` Daniel Phillips
2002-09-05 19:22                 ` Andrew Morton
2002-09-05 20:00                   ` Daniel Phillips
2002-09-05 13:33     ` Rik van Riel

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