Problems unmounting/fssyncking extern UFS filesystem
Ronald Klop
ronald-freebsd8 at klop.yi.org
Mon Nov 27 16:15:42 PST 2006
On Mon, 27 Nov 2006 21:19:40 +0100, Matthew D. Fuller
<fullermd at over-yonder.net> wrote:
> On Tue, Nov 28, 2006 at 05:37:58AM +1100 I heard the voice of
> Peter Jeremy, and lo! it spake thus:
>>
>> All current Un*x filesystems will automatically flush all buffers as
>> part of the unmount process
>
> That Depends(tm), partly on what you mean by 'unmount'.
>
> With my Nov05 and Jun06 -CURRENT's, I had to take great care to sync
> and sync and wait and sync and sync filesystems before "mount -u -o
> ro"'ing them, because otherwise they'd end up NOT flushing everything,
> leaving unreferenced stuff around that fsck had to clean up, but only
> if I ran it manually because mount DID mark the filesystem as clean.
>
> I just tried to reproduce it on my last-week -CURRENT, and it no
> longer does that. Instead, it locked itself into a "softdep_waitidle:
> Failed to flush worklist" loop and won't LET me remount r/o (or
> unmount) the filesystems. Obviously, I should have kept up my
> now-established habit of sync'ing and waiting a while before
> un/remounting...
IMHO: Please discuss this on freebsd-current at freebsd.org. And read the
handbook (http://www.freebsd.org/handbook) about
releases/versions/branches. -CURRENT is known to have bugs.
--
Ronald Klop
Amsterdam, The Netherlands
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