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Date:      Tue, 7 Dec 1999 08:20:15 -0800 (PST)
From:      Matthew Jacob <mjacob@feral.com>
To:        Luoqi Chen <luoqi@watermarkgroup.com>
Cc:        jazepeda@pacbell.net, phk@critter.freebsd.dk, brian@CSUA.Berkeley.EDU, current@FreeBSD.ORG, vallo@matti.ee
Subject:   Re: mount(2) broken?
Message-ID:  <Pine.BSF.4.10.9912070819100.35050-100000@beppo.feral.com>
In-Reply-To: <199912070716.CAA16646@lor.watermarkgroup.com>

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On Tue, 7 Dec 1999, Luoqi Chen wrote:

> > I've seen this exact same thing before too.  In fact it was two rather
> > annoying things, one being a single solitary last buffer that wouldn't
> > sync and thus left the whole fs marked dirty, and then fsck would check
> > it, see it was fine, but mount wouldn't recognize that it was clean.
> > 
> > 'Course I saw this this morning too.  Yes, with a new kernel, new devices,
> > ata driver, and new world.  'Twas very odd.
> > 
> > - alex
> > 
> I'd like to add something about the last buffer wouldn't sync. This occurs
> when a shutdown syscall is issued when the syncer process is asleep waiting
> for a buffer write to complete. The write will never complete, because the
> syncer won't be given a chance to run again, and the buffer will stay marked
> as busy and become the buffer that wouldn't sync. I haven't thought about
> a clean way of handling this situation, maybe some of you out there have
> better ideas...

Ah. That *could* be happening to me, but this happens even with a
quiescent system (I mean, several times with nothing happening).





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