From: Andrew Morton <akpm@zip.com.au>
To: Daniel Phillips <phillips@bonn-fries.net>
Cc: Andreas Dilger <adilger@clusterfs.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [patch] delayed disk block allocation
Date: Mon, 04 Mar 2002 00:34:21 -0800 [thread overview]
Message-ID: <3C83318D.D79F887A@zip.com.au> (raw)
In-Reply-To: <3C7F3B4A.41DB7754@zip.com.au> <20020303223103.J4188@lynx.adilger.int> <3C83280A.A8CF7CC8@zip.com.au>, <3C83280A.A8CF7CC8@zip.com.au> <E16hnUV-0000aa-00@starship.berlin>
Daniel Phillips wrote:
>
> ..
> I guess 4K PAGE_CACHE_SIZE will serve us well for another couple of years,
Having reviewed the archives, it seems that the multipage PAGE_CACHE_SIZE
patches which Hugh and Ben were working on were mainly designed to increase
I/O efficiency.
If that's the only reason for large pages then yeah, I think we can stick
with 4k PAGE_CACHE_SIZE :). There really are tremendous efficiencies
available in the current code.
Another (and very significant) reason for large pages is to decrease
TLB misses. Said to be very important for large-working-set scientific
apps and such. But that doesn't seem to have a lot to do with PAGE_CACHE_SIZE?
> ...
> By the way, have you ever seen a sparse 1K blocksize file?
> ...
Sure I have. I just created one. (I'm writing test cases for my
emails now. Sheesh).
-
next prev parent reply other threads:[~2002-03-04 8:36 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-01 8:26 [patch] delayed disk block allocation Andrew Morton
2002-03-04 2:08 ` Daniel Phillips
2002-03-04 3:10 ` Jeff Garzik
2002-03-04 7:27 ` Andrew Morton
2002-03-04 5:04 ` Mike Fedyk
2002-03-04 5:31 ` Andreas Dilger
2002-03-04 5:40 ` Mike Fedyk
2002-03-04 6:14 ` Andreas Dilger
2002-03-04 5:41 ` Jeff Garzik
2002-03-04 6:18 ` Andreas Dilger
2002-03-04 15:02 ` Hans Reiser
2002-03-06 12:59 ` Pavel Machek
2002-03-04 7:53 ` Andrew Morton
2002-03-04 8:06 ` Daniel Phillips
2002-03-04 8:34 ` Andrew Morton [this message]
2002-03-04 7:20 ` Andrew Morton
2002-03-04 9:23 ` Daniel Phillips
-- strict thread matches above, loose matches on Subject: below --
2002-03-04 14:54 rwhron
2002-03-04 15:10 ` Jeff Garzik
2002-03-07 12:06 Etienne Lorrain
2002-03-07 14:47 ` Steve Lord
2002-03-07 17:30 ` Mike Fedyk
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