linux-ext4 - Re: Zero length files - an alternative approach?

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Message-ID: <49CFD72A.5010107@davidnewall.com>
Date:	Mon, 30 Mar 2009 06:46:42 +1030
From:	David Newall <davidn@...idnewall.com>
To:	linux-kernel@...r.kernel.org
CC:	linux-ext4@...r.kernel.org
Subject: Re: Zero length files - an alternative approach?

Pavel Machek wrote:
> fsync() is easy. But some people _want_ to have either newdata _or_
> olddata, but don't care which one, and would prefer to avoid
> fsync. That's where replace() should help...

Most people, I wager, care more about their code being portable than
they do about leaping through a Linux-specific hoop.  They're not going
to use replace; not ever; that's what link/unlink is for.

If you think it's reasonable to modify every instance in applications
where a sudden crash would cause data loss, why not make a mount-time
flag that does all of that in FS; and for the other 99% of users, it
doesn't, but runs faster?
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