Hi, gfs2 write bandwidth regression on 6.4-rc3 compare to 5.15.y. we added linux-xfs@ and linux-fsdevel@ because some related problem[1] and related patches[2]. we compared 6.4-rc3(rather than 6.1.y) to 5.15.y becasue some related patches[2] work only for 6.4 now. [1] https://lore.kernel.org/linux-xfs/20230508172406.1CF3.409509F4@xxxxxxxxxxxx/ [2] https://lore.kernel.org/linux-xfs/20230520163603.1794256-1-willy@xxxxxxxxxxxxx/ test case: 1) PCIe3 SSD *4 with LVM 2) gfs2 lock_nolock gfs2 attr(T) GFS2_AF_ORLOV # chattr +T /mnt/test 3) fio fio --name=global --rw=write -bs=1024Ki -size=32Gi -runtime=30 -iodepth 1 -ioengine sync -zero_buffers=1 -direct=0 -end_fsync=1 -numjobs=1 \ -name write-bandwidth-1 -filename=/mnt/test/sub1/1.txt \ -name write-bandwidth-2 -filename=/mnt/test/sub2/1.txt \ -name write-bandwidth-3 -filename=/mnt/test/sub3/1.txt \ -name write-bandwidth-4 -filename=/mnt/test/sub4/1.txt 4) patches[2] are applied to 6.4-rc3. 5.15.y result fio WRITE: bw=5139MiB/s (5389MB/s), 6.4-rc3 result fio WRITE: bw=2599MiB/s (2725MB/s) Best Regards Wang Yugui (wangyugui@xxxxxxxxxxxx) 2023/05/23
