From: ebiederman@uswest.net (Eric W. Biederman)
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: Doug McNaught <doug@wireboard.com>,
Lew Wolfgang <wolfgang@sweet-haven.com>,
linux-kernel@vger.kernel.org
Subject: Re: Dump corrupts ext2?
Date: 10 Oct 2001 23:07:42 -0600 [thread overview]
Message-ID: <m1lmiivk69.fsf@frodo.biederman.org> (raw)
In-Reply-To: <Pine.LNX.4.33.0110101558210.7049-100000@train.sweet-haven.com> <m3elob3xao.fsf@belphigor.mcnaught.org> <20011010173811.C3795@mikef-linux.matchmail.com>
In-Reply-To: <20011010173811.C3795@mikef-linux.matchmail.com>
Mike Fedyk <mfedyk@matchmail.com> writes:
> IIRC, 2.2 didn't have a coherent buffer and page cache also.
>
> I.E. if you "cat /dev/hda > /dev/null" you wouldn't be able to expect any
> speedup when reading through the mounted filesystem (except for meta-data?).
>
> Am I wrong? Has Linux ever had a coherent page and buffer cache?
In 2.2 all writes went through the buffer cache. So for the buffer cache
was coherent with the filesystem but the filesystem wasn't coherent with the
buffer cache.
Eric
next prev parent reply other threads:[~2001-10-11 5:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-10 23:03 Dump corrupts ext2? Lew Wolfgang
2001-10-10 23:11 ` Doug McNaught
2001-10-10 23:34 ` Andreas Dilger
2001-10-10 23:55 ` Doug McNaught
2001-10-11 1:33 ` Richard Gooch
2001-10-11 1:48 ` Chris Mason
2001-10-11 4:16 ` Benjamin LaHaise
2001-10-11 4:29 ` Alexander Viro
2001-10-11 11:47 ` Chris Mason
2001-10-11 4:25 ` Richard Gooch
2001-10-11 2:57 ` H. Peter Anvin
2001-10-11 3:13 ` Andreas Dilger
2001-10-11 0:38 ` Mike Fedyk
2001-10-11 5:07 ` Eric W. Biederman [this message]
2001-10-10 23:28 ` H. Peter Anvin
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