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SubjectRe: bdflush and postgres stuck in D state
On Tue, Sep 18, 2001 at 10:49:10AM -0700, Andrew Morton wrote:
> Jakob Østergaard wrote:
> >
> > Sorry for following up on my own post, I have a little extra
> > information.
> >
> > I started a g++ job to try to force the machine to write out some dirty
> > buffers before I reboot. g++ now hangs along with two sync's, bdflush
> > and the postgres process.
> >
> Since 2.4.7 several bugs have been fixed in RAID1 which would
> cause this, including a missing blockdevice unplug and failure
> to hang onto the supposedly-reserved RAID1 buffer-heads.

Even kernels as recent as 2.4.9 have this bug. See this thread for more
info and a patch which fixes this bug.

The thread:

The patch:

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