On Mon, 2011-01-10 at 11:44 +1100, Dave Chinner wrote: > From: Dave Chinner <dchinner@xxxxxxxxxx> > > Running some recent repair tests on broken filesystem meant running > phase 1 and 2 repeatedly to reproduce an issue at the start of phase > 3. Phase 2 was taking approximately 10 minutes to run as it > processes each AG serially. > > Phase 2 can be trivially parallelised - it is simply scanning the > per AG trees to calculate free block counts and free and used inodes > counts. This can be done safely in parallel by giving each AG it's > own structure to aggregate counts into, then once the AG scan is > complete adding them all together. > > This patch uses 32-way threading which results in no noticable > slowdown on single SATA drives with NCQ, but results in ~10x > reduction in runtime on a 12 disk RAID-0 array. > > Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx> This looks good. Sorry I didn't say so earlier (I signed off on your first one). Reviewed-by: Alex Elder <aelder@xxxxxxx> _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
