This is version 2 of the patch series addressing issues causing deadlocks under load and sync ratio/action and health char races. I reordered patches and split a large one further up. Patches 1-8 are critical with 6-8 to be applied in order and 9-11 providing cleanups and 12 adding an additional constructor check. Patch 1: 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 2: be prepared for MD raid personalities to adjust rdev sectors after finishing a reshape conversion (MD upstream commit c6563a8c38fde3c1c7fc925a10bde3ca20799301) Patch 3: avoid bogus resize assumption when reshsaping. Needed becaue of patch 2. 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). Avoids random deadlocks. 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: close an recovery flag race in raid_status() and its callees by taking a copy and passing it on. Patch 7: avoid the array_in_sync variale in preparation for more state to pass between raid_status() and its callees. Patch 8: fix various sync state issues causing racy/bogus sync ratio, sync_action ad health chars in dm_status() info output. Patch 9: cleanup grouping the definition of raid set rw and in_sync with mddev_suspend Patch 10+11: cleanup removing an unused struct member and fix comments Patch 12: enhance adding a data component device size check to the constructor (i.e. reject on small component data devices) Resolves: rhbz1210637 Resolves: rhbz1372101 Related: rhbz1388632 Resolves: rhbz1507729 Resolves: rhbz1508070 Related: rhbz1514215 Resolves: rhbz1514500 Heinz Mauelshagen (12): dm raid: fix deadlock caused by stopped writes dm raid: correct sizes and check of component devices dm raid: correct resizing state in ctr dm raid: correct raid set size revalidation dm raid: enhance resume() frozen checks dm raid: close MD recovery flags race window dm raid: avoid array_in_sync variable dm raid: fix rs_get_progress() synchronization state/ratio 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 | 274 ++++++++++++++++++++++---------- 2 files changed, 191 insertions(+), 86 deletions(-) -- 2.13.6 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
