On Fri, Feb 14, 2014 at 11:24:27AM +1100, Dave Chinner wrote:
> > I can fix this one easily - we already have a workqueue for doing
> > async log pushes (will split the stack between xlog_cil_force_lsn
> > and xlog_cil_push), but the reason we haven't used it for synchronous
> > log forces is that screws up fsync performance on CFQ. We don't
> > recommend CFQ with XFS anyway, so I think I'll make this change
> > anyway.
>
> Dave, the patch below should chop off the stack usage from
> xfs_log_force_lsn() issuing IO by deferring it to the CIL workqueue.
> Can you given this a run?
Looks like it's survived an overnight run..
Dave
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