From: Bodo Eggert <harvested.in.lkml@7eggert.dyndns.org>
To: Badari Pulavarty <pbadari@gmail.com>,
Guido Fiala <gfiala@s.netic.de>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: large files unnecessary trashing filesystem cache?
Date: Tue, 18 Oct 2005 23:58:45 +0200 [thread overview]
Message-ID: <E1ERzTq-0001IA-Ba@be1.lrz> (raw)
In-Reply-To: <4Z6zs-27l-39@gated-at.bofh.it>
Badari Pulavarty <pbadari@gmail.com> wrote:
> On Tue, 2005-10-18 at 22:01 +0200, Guido Fiala wrote:
[large files trash cache]
> Is there a reason why those applications couldn't use O_DIRECT ?
The cache trashing will affect all programs handling large files:
mkisofs * > iso
dd < /dev/hdx42 | gzip > imagefile
perl -pe's/filenamea/filenameb/' < iso | cdrecord - # <- never tried
Changing a few programs will only partly cover the problems.
I guess the solution would be using random cache eviction rather than
a FIFO. I never took a look the cache mechanism, so I may very well be
wrong here.
--
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.
next parent reply other threads:[~2005-10-18 21:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4Z5WG-1iM-19@gated-at.bofh.it>
[not found] ` <4Z6zs-27l-39@gated-at.bofh.it>
2005-10-18 21:58 ` Bodo Eggert [this message]
2005-10-18 23:05 ` Badari Pulavarty
2005-10-19 0:20 ` David Lang
2005-10-19 0:33 ` Fawad Lateef
2005-10-19 1:42 ` Bernd Eckenfels
2005-10-19 7:23 ` Bodo Eggert
2005-10-19 11:06 ` gfiala
2005-10-19 13:43 ` Avi Kivity
2005-10-18 20:01 Guido Fiala
2005-10-18 20:48 ` Badari Pulavarty
2005-10-20 15:23 ` Guido Fiala
2005-10-19 3:02 ` Andrew James Wade
2005-10-19 4:37 ` Andrew Morton
2005-10-19 5:45 ` Andrew James Wade
2005-10-19 11:01 ` gfiala
2005-10-19 11:10 ` gfiala
2005-10-19 15:54 ` Ingo Oeser
2005-10-19 19:49 ` Andrew Morton
2005-10-19 22:26 ` Paul Jackson
2005-10-20 6:28 ` Ingo Oeser
2005-10-19 4:10 ` Lee Revell
2005-10-19 15:43 ` Badari Pulavarty
2005-10-19 17:58 ` Guido Fiala
2005-10-19 18:43 ` Kyle Moffett
2005-10-19 18:52 ` Guido Fiala
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