Bug in MDADM or just crappy computer?
From: Phantazm <hidden>
Date: 2005-02-20 08:11:29
My resync problem still goes on :-( When the resync is done on my raid5 with 8 disks just goes into a loop and marks 2 disks as failed. Then i need to reboot and assemble them again with the force. (the 2 disks thats failing isnt on same controller card) And the kernel log is filled up with this. Feb 20 08:43:13 [kernel] md: md0: sync done. Feb 20 08:43:13 [kernel] md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: md0: sync done. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: using maximum available idle IO bandwith (but not more than 15000 KB/sec) for reconstruction. Feb 20 08:43:13 [kernel] md: using 128k window, over a total of 199141632 blocks. Feb 20 08:43:13 [kernel] md: md0: sync done. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] .<6>md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: using maximum available idle IO bandwith (but not more than 15000 KB/sec) for reconstruction. Feb 20 08:43:13 [kernel] md: using 128k window, over a total of 199141632 blocks. Feb 20 08:43:13 [kernel] md: md0: sync done. Feb 20 08:43:13 [kernel] md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: using maximum available idle IO bandwith (but not more than 15000 KB/sec) for reconstruction. Feb 20 08:43:13 [kernel] md: using 128k window, over a total of 199141632 blocks. Feb 20 08:43:13 [kernel] md: md0: sync done. Feb 20 08:43:13 [kernel] md: syncing RAID array md0 Feb 20 08:43:13 [kernel] md: minimum _guaranteed_ reconstruction speed: 5000 KB/sec/disc. Feb 20 08:43:13 [kernel] md: using maximum available idle IO bandwith (but not more than 15000 KB/sec) for reconstruction. Feb 20 08:43:13 [kernel] md: using 128k window, over a total of 199141632 blocks. aint got a single clue what it could be. I have tried this patch too.. (The disks are not broken, that i know for sure) -------------------------------------------- Fix endless loop when syncing an array that doesn't need any resync. If the resync checkpoint for an array is at the end of the array, It doesn't get set to MAX_SECTOR, so resyncing will be retried. By updating curr_resync early, this problem is fixed. Signed-off-by: Neil Brown <redacted> ### Diffstat output ./drivers/md/md.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~ 2005-02-02 12:08:42.000000000 +1100
+++ ./drivers/md/md.c 2005-02-02 12:08:53.000000000 +1100
@@ -3472,10 +3472,12 @@ static void md_do_sync(mddev_t *mddev)
init_waitqueue_head(&mddev->recovery_wait);
last_check = 0;
- if (j)
+ if (j>2) {
printk(KERN_INFO
"md: resuming recovery of %s from checkpoint.\n",
mdname(mddev));
+ mddev->curr_resync = j;
+ }
while (j < max_sectors) {
int sectors;
@@ -3562,7 +3564,7 @@ static void md_do_sync(mddev_t *mddev)
if (!test_bit(MD_RECOVERY_ERR, &mddev->recovery) &&
mddev->curr_resync > 2 &&
- mddev->curr_resync > mddev->recovery_cp) {
+ mddev->curr_resync >= mddev->recovery_cp) {
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
printk(KERN_INFO
"md: checkpointing recovery of %s.\n",