From: Ed Tomlinson <edt@aei.ca>
To: linux-kernel@vger.kernel.org
Cc: Mike Fedyk <mfedyk@matchmail.com>
Subject: Re: Large slab cache in 2.6.1
Date: Sun, 22 Feb 2004 22:33:20 -0500 [thread overview]
Message-ID: <200402222233.20426.edt@aei.ca> (raw)
In-Reply-To: <40396551.9030002@matchmail.com>
On February 22, 2004 09:28 pm, Mike Fedyk wrote:
> Ed Tomlinson wrote:
> > On February 21, 2004 10:28 pm, Linus Torvalds wrote:
> >>On Sat, 21 Feb 2004, Chris Wedgwood wrote:
> >>>Maybe gradual page-cache pressure could shirnk the slab?
> >>
> >>What happened to the experiment of having slab pages on the (in)active
> >>lists and letting them be free'd that way? Didn't somebody already do
> >>that? Ed Tomlinson and Craig Kulesa?
> >
> > You have a good memory.
> >
> > We dropped this experiment since there was a lot of latency between the
> > time a slab page became freeable and when it was actually freed. The
> > current call back scheme was designed to balance slab preasure and
> > vmscaning.
>
> Does it really matter if there is a lot of latency? How does this
> affect real-world results? IOW, if it's not at the end of the LRU, then
> there's probably something better to free instead...
It mattered. People noticed and complained. In any case, as Andrew
pointed out, we get the same effect, without long latencies, in a simplier
manner with the current scheme.
Ed
next prev parent reply other threads:[~2004-02-23 3:33 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-22 0:50 Large slab cache in 2.6.1 Mike Fedyk
2004-02-22 1:09 ` Mike Fedyk
2004-02-22 1:20 ` William Lee Irwin III
2004-02-22 2:03 ` Mike Fedyk
2004-02-22 2:17 ` William Lee Irwin III
2004-02-22 2:38 ` Nick Piggin
2004-02-22 2:46 ` William Lee Irwin III
2004-02-22 2:40 ` Mike Fedyk
2004-02-22 2:58 ` Nick Piggin
2004-02-22 2:33 ` Nick Piggin
2004-02-22 2:46 ` Nick Piggin
2004-02-22 2:54 ` Nick Piggin
2004-02-22 2:36 ` Chris Wedgwood
2004-02-22 3:03 ` Linus Torvalds
2004-02-22 3:11 ` Chris Wedgwood
2004-02-22 3:28 ` Linus Torvalds
2004-02-22 3:29 ` Chris Wedgwood
2004-02-22 3:31 ` Chris Wedgwood
2004-02-22 4:01 ` Nick Piggin
2004-02-22 4:10 ` Nick Piggin
2004-02-22 4:30 ` Nick Piggin
2004-02-22 4:41 ` Mike Fedyk
2004-02-22 5:37 ` Nick Piggin
2004-02-22 5:44 ` Chris Wedgwood
2004-02-22 5:52 ` Nick Piggin
2004-02-22 5:50 ` Mike Fedyk
2004-02-22 6:01 ` Nick Piggin
2004-02-22 6:17 ` Andrew Morton
2004-02-22 6:35 ` Nick Piggin
2004-02-22 6:57 ` Andrew Morton
2004-02-22 7:20 ` Nick Piggin
2004-02-22 8:36 ` Chris Wedgwood
2004-02-22 9:13 ` Andrew Morton
2004-02-23 0:16 ` Nick Piggin
2004-02-23 0:26 ` Andrew Morton
2004-02-23 0:34 ` Nick Piggin
2004-02-23 0:46 ` Andrew Morton
2004-02-23 0:54 ` Nick Piggin
2004-02-23 1:00 ` Andrew Morton
2004-02-23 1:06 ` Nick Piggin
2004-02-22 6:45 ` Mike Fedyk
2004-02-22 6:58 ` Nick Piggin
2004-02-22 7:20 ` Mike Fedyk
2004-02-22 6:09 ` Andrew Morton
2004-02-22 17:05 ` Linus Torvalds
2004-02-23 0:29 ` Nick Piggin
2004-02-22 6:15 ` Andrew Morton
2004-02-22 16:08 ` Martin J. Bligh
2004-02-22 17:55 ` Jamie Lokier
2004-02-23 3:45 ` Mike Fedyk
2004-02-22 21:13 ` Dipankar Sarma
2004-02-22 14:03 ` Ed Tomlinson
2004-02-23 2:28 ` Mike Fedyk
2004-02-23 3:33 ` Ed Tomlinson [this message]
2004-02-22 3:21 ` Mike Fedyk
-- strict thread matches above, loose matches on Subject: below --
2004-02-22 11:00 Manfred Spraul
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