From: Heinz Mauelshagen <heinzm@xxxxxxxxxx> This patch series addresses issues causing deadlocks under load and sync ratio races. The first 6 patches are critical, the last 4 are cleanup and an enhancement to constructor checks. Patch 1+2: be prepared for MD raid personalities to adjust rdev sectors after finishing a reshape conversion (MD upstream commit c6563a8c38fde3c1c7fc925a10bde3ca20799301) Patch 3: fix reshape conversion deadlock under io load by moving md_stop_writes() to post suspend thus allowing the MD resync thread to work until after the raid set got quiesced. Patch 4: fix raid set size revalidation for disk adding reshape and related deadlock: do it before starting the reshape when shrinking and after when growing (i.e. remove/add stripes). Patch 5: fix reshape staying frozen on multiple table reloads. Only the last table reload may unfreeze the raid set so that the proper reshape position can be retrieved from the superblocks read in the constructor. Patch 6: Fix rs_get_progress to avoid bogus sync ratios. Patch 7: cleanup grouping the definition of raid set rw and in_sync with mddev_suspend Patch 8+9: cleanup removing an unused struct member and fix comments Patch 10: enhance adding a data component device size check to the constructor (i.e. reject on small component data devices) Resolves: rhbz1372101 Related: rhbz1388632 Resolves: rhbz1507729 Resolves: rhbz1508070 Related: rhbz1514215 Resolves: rhbz1514500 Heinz Mauelshagen (10): dm raid: correct sizes and check of component devices dm raid: correct resizing state in ctr dm raid: fix deadlock caused by stopped writes dm raid: correct raid set size revalidation dm raid: enhance resume() frozen checks dm raid: clear out rs_get_progress() dm raid: group rw and in_sync definitions with mddev_resume() dm raid: remove unused "struct raid_set" member dm raid: comments dm raid: add component device size check Documentation/device-mapper/dm-raid.txt | 3 +- drivers/md/dm-raid.c | 261 +++++++++++++++++++++----------- 2 files changed, 178 insertions(+), 86 deletions(-) -- 2.13.6 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
