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DragonFly bugs List (threaded) for 2006-02
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Re: busy buffer problem on HEAD

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 21 Feb 2006 09:34:52 -0800 (PST)

:At Mon, 20 Feb 2006 12:15:35 -0800 (PST),
:Matthew Dillon wrote:
:>     Hmm.  There was some bad code pre-patch that I removed that was probably
:>     handling that case.  The real problem is that the nfsd processes are 
:>     getting wiped out by the shutdown before all the buffers are flushed.
:>     It's kind of a chicken and egg problem.
:This is a nfs client so it does not run nfsd, but perhaps you mean something
:>     This patch might not be quite sufficient, but I'd like you to try it
:>     anyhow.  It only counts buffers that are undergoing I/O as 'busy' (which
:>     is what the original code did), but unlike the original code I don't
:>     try to remove the mount point so its possible that the shutdown sequence
:>     will block a little further on when it tries to unmount the filesystems.
:It seems to work. The system stays on the "syncing disks" line a while but
:otherwise reboots fine.
:        -Richard

    Ok, it sounds like its an improvement even if it isn't perfect so I'll
    go ahead and commit that patch.

					Matthew Dillon 

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