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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?
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From: ebiederman@uswest.net (Eric W. Biederman)
Date: 10 Oct 2001 23:07:42 -0600
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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
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