-----Original Message----- From: NeilBrown [mailto:neilb@xxxxxxx] Sent: Thursday, July 25, 2013 8:36 PM To: Justin Piszcz Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-raid@xxxxxxxxxxxxxxx Subject: Re: 3.10.1: echo repair > sync_action causes hang on RAID-1 (2 x SSD) On Thu, 25 Jul 2013 19:10:50 -0400 "Justin Piszcz" <jpiszcz@xxxxxxxxxxxxxxx> wrote: > Did the fix by chance make it into 3.10.3? No, it looks like it missed again. I gather there was a large inflow of patches for -stable in the 3.11-rc1 merge window and Greg has been processing them in batches. Hopefully in 3.10.4. The relevant patch is commit 30bc9b53878a9921b02e3 in mainline. NeilBrown -- Method to get patch via git and patch kernel: $ git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git $ git log |grep 30bc9b53878a9921b02e3 commit 30bc9b53878a9921b02e3b5bc4283ac1c6de102a $ git show 30bc9b53878a9921b02e3b5bc4283ac1c6de102a > /tmp/a # patch -p1 < /tmp/a patching file drivers/md/raid1.c Hunk #1 succeeded at 1848 (offset -1 lines). Hunk #2 succeeded at 1886 (offset -1 lines). Hunk #3 succeeded at 1915 (offset -1 lines). Reboot- tested, success, thanks..! One follow-up question: $ cat /sys/block/md1/md/mismatch_cnt 314112 -> On a live RAID-1 (root filesystem) without swap, is it normal to have such a high mismatch_cnt even after a repair? First repair: Fri Jul 26 05:30:47 EDT 2013: The meta-device /dev/md1 has mismatch_cnt 314112 sectors. Second repair: Fri Jul 26 05:30:47 EDT 2013: The meta-device /dev/md1 has mismatch_cnt 313600 sectors. Should I be concerned? Testing the patch: Personalities : [raid1] md1 : active raid1 sdc2[0] sdb2[1] 233381376 blocks [2/2] [UU] [>....................] check = 0.3% (838976/233381376) finish=9.2min speed=419488K/sec md0 : active raid1 sdc1[0] sdb1[1] 1048512 blocks [2/2] [UU] Personalities : [raid1] md1 : active raid1 sdc2[0] sdb2[1] 233381376 blocks [2/2] [UU] [===============>.....] check = 77.5% (180889856/233381376) finish=2.5min speed=342654K/sec md0 : active raid1 sdc1[0] sdb1[1] 1048512 blocks [2/2] [UU] Personalities : [raid1] md1 : active raid1 sdc2[0] sdb2[1] 233381376 blocks [2/2] [UU] md0 : active raid1 sdc1[0] sdb1[1] 1048512 blocks [2/2] [UU] Justin. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
