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From: Manfred Spraul <manfred@colorfullife.com>
To: Andrew Morton <akpm@digeo.com>
Cc: Ed Tomlinson <tomlins@cam.org>, linux-kernel@vger.kernel.org
Subject: Re: [patch 3/4] slab reclaim balancing
Date: Thu, 26 Sep 2002 16:13:28 +0200	[thread overview]
Message-ID: <3D931608.3040702@colorfullife.com> (raw)

> Slab caches no longer hold onto completely empty pages.  Instead, pages
> are freed as soon as they have zero objects.  This is possibly a
> performance hit for slabs which have constructors, but it's doubtful. 

It could be a performance hit for slab with just one object - e.g the 
page sized names cache, used in every syscall that has a path name as a 
parameter.

Ed, have you benchmarked that there is no noticable slowdown?
e.g. test the time needed for stat("."). on UP, otherwise the SMP arrays 
would perform the caching.

--
	Manfred


             reply	other threads:[~2002-09-26 14:08 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-26 14:13 Manfred Spraul [this message]
2002-09-26 14:20 ` [patch 3/4] slab reclaim balancing William Lee Irwin III
2002-09-26 15:24   ` Manfred Spraul
2002-09-26 17:37 ` Andrew Morton
2002-09-26 18:47   ` Manfred Spraul
2002-09-26 19:49     ` Andrew Morton
2002-09-26 20:49       ` Manfred Spraul
2002-09-26 21:39         ` Andrew Morton
2002-09-27  0:41           ` Ed Tomlinson
2002-09-27 17:24             ` Manfred Spraul
2002-09-27 18:26               ` Andrew Morton
2002-09-27 19:38                 ` Manfred Spraul
2002-09-27 19:52                   ` Andrew Morton
2002-09-27 15:59           ` Manfred Spraul
  -- strict thread matches above, loose matches on Subject: below --
2002-09-26  4:08 Andrew Morton
2002-09-26 11:39 ` Ed Tomlinson
2002-09-26 15:09 ` Ed Tomlinson

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