On Sat, Feb 02, 2002 at 02:39:19PM +0100, Matthias Andree wrote:
> Update to the current 2.4.18-pre and retry.

Ok.
adi:~> uname -a
Linux home.org 2.4.18-pre7 #1 Sat Feb 2 22:30:11 JAVT 2002 i586 unknown

> Is the write cache enabled?

Though I use to make write cache enabled, but in this 'test' I turn
it off.

> Get hdparm v4.6 or newer, run hdparm -I (as root) and look if the write
> cache is on. Use hdparm -W0 to turn it off.

I still don't have that version, yet. I may try. But, I use -W0 option.

As I roughly read about ext3 documentation, it never say that link()
unlink() operation will be done synchronously. It only tell about
fsync() (using O_SYNC or whatever).

Note that, indeed, there is no mail 'get lost'. They only stay on
Maildir/tmp. Then I think it's because link/unlink still done
asynchronously. I said 'lost' because if it stil on tmp dir,
then no MUA/popper could retreive it. Yes, there is nothing
I found on lost+found.

OK. I did the test again using this new kernel, and stil got
the same results. If I repeat the same test using Bruce's libsyncdir
the problem disappear. It's because (I think) with libsyncdir,
link()/unlink() would be done synchronously (see my strace output
on my previous message). I think using chattr +S on mail maildir
would solve the problem either (I don't test this condition, yet).

Regards,

P.Y. Adi Prasaja

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