Date: Tue, 12 Feb 2002 23:24:09 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Phil Homewood <pdh@snapgear.com> Cc: stable@FreeBSD.ORG Subject: Re: cvs commit: src/sys/ufs/ffs ffs_softdep.c Message-ID: <200202130724.g1D7O9d97443@apollo.backplane.com> References: <200202101911.g1AJBOk30917@apollo.backplane.com> <20020211010801.K8897-100000@patrocles.silby.com> <20020212090847.A3341@iv.nn.kiev.ua> <20020212102346.GF32279@moreton.com.au>
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No, this reference is related to downgrading a RW filesystem
into a RO filesystem. There was a softupdates bug related
to that type of operation. It was fixed in -stable but was too late
for the release. If you compile the latest -stable kernel the
RW/RO downgrade bug should disappear.
At the moment 'sync' does not completely sync a softupdates filesystem.
You have to run it a bunch of times. It's because sync only makes one
pass through the buffer cache and that isn't enough to unwind all the
dependancies.
-Matt
Matthew Dillon
<dillon@backplane.com>
:Valentin Nechayev wrote:
:> I think the bug history is longer that supposed, and some explicit checks
:> should be added.
:>
:> OTOH it is very strange that softupdates code doesn't react on sync().
:> At least, IMO, sync() should stimulate softupdates code to flush more quickly.
:> As a variant, old ("asynchronous") Unix sync() behavior can be restored
:> when sync() stimulates flushing, but doesn't return while previous flushing
:> is in progress.
:
:Could this bug be related to what I and Bill Triplett described in
:
:http://docs.freebsd.org/cgi/getmsg.cgi?fetch=13966+0+archive/2002/freebsd-stable/20020203.freebsd-stable
:
:http://docs.freebsd.org/cgi/getmsg.cgi?fetch=849071+0+archive/2002/freebsd-stable/20020203.freebsd-stable
:
:?
:
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