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Re: file corruption during emacs build on XFS logical volume

To: Sean Neakums <sneakums@xxxxxxxx>
Subject: Re: file corruption during emacs build on XFS logical volume
From: Steve Lord <lord@xxxxxxx>
Date: 04 Jan 2002 12:42:10 -0600
Cc: Linux XFS <linux-xfs@xxxxxxxxxxx>
In-reply-to: <6uofkaj6zj.fsf@xxxxxxxxxxxxx>
References: <1010141444.1992.3.camel@pyewacket> <1010164935.1945.8.camel@UberGeek> <6u666ikn5n.fsf@xxxxxxxxxxxxx> <6usn9mj7id.fsf@xxxxxxxxxxxxx> <6uofkaj6zj.fsf@xxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
On Fri, 2002-01-04 at 12:39, Sean Neakums wrote:

> I think I can finally reproduce the bogus dumps.  I just did it here,
> three times.  What I did was: run the io-test program above on two
> different files for approx three minutes, then start the emacs dump.
> When the dump completed, I started a third io-test and left the three
> of them run for about five or so more minutes.  What I'm trying to do
> with all this I/O is to force the dumped binary's pages to be written
> to disk.

Can you expand on the 'dumps' I am not really familiar with the
emacs build process, so I don't know which part of the process
you are refering to here.


> So after the five minutes or so, I killed the io-test threads and
> attempted to start the dumped binary, which failed with a `cannot
> execute' message from the shell.  I looked in the file, and it pure
> garbage: not even an "ELF" string at the start of the file.
> I am now going to do a build of the upstream source and see if I can
> make the dump break on that too.  I'm hopeful that it will, as the
> unexec code is the same in upstream as in the Debian emacs21 package.
> -- 
>  /////////////////  |                  | The spark of a pin
> <sneakums@xxxxxxxx> |  (require 'gnu)  | dropping, falling feather-like.
>  \\\\\\\\\\\\\\\\\  |                  | There is too much noise.

Steve Lord                                      voice: +1-651-683-3511
Principal Engineer, Filesystem Software         email: lord@xxxxxxx

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