linux-kernel - Re: Linux 2.6.29

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Date:	Sat, 28 Mar 2009 12:53:34 +0100
From:	Bodo Eggert <7eggert@....de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Theodore Tso <tytso@....edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rees <drees76@...il.com>, Jesper Krogh <jesper@...gh.cc>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.29

Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> On Fri, 27 Mar 2009, Linus Torvalds wrote:

>> Yes, some editors (vi, emacs) do it, but even there it's configurable.
> 
> .. and looking at history, it's even pretty modern. From the vim logs:
> 
> Patch 6.2.499
> Problem:   When writing a file and halting the system, the file might be lost
> when using a journalling file system.
> Solution:  Use fsync() to flush the file data to disk after writing a file.
> (Radim Kolar)
> Files:     src/fileio.c
> 
> so it looks (assuming those patch numbers mean what they would seem to
> mean) that 'fsync()' in vim is from after 6.2 was released. Some time in
> 2004.

Besides that, it's a fix specific for /journaled/ filesystems. It's easy to see
that the same journal that was supposed to increase filesystem reliability
is CAUSING more unreliable behavior.

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