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a85dd7b8df
linux/drivers/md
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Song Liu a85dd7b8df md/r5cache: flush data only stripes in r5l_recovery_log() 
For safer operation, all arrays start in write-through mode, which has been
better tested and is more mature. And actually the write-through/write-mode
isn't persistent after array restarted, so we always start array in
write-through mode. However, if recovery found data-only stripes before the
shutdown (from previous write-back mode), it is not safe to start the array in
write-through mode, as write-through mode can not handle stripes with data in
write-back cache. To solve this problem, we flush all data-only stripes in
r5l_recovery_log(). When r5l_recovery_log() returns, the array starts with
empty cache in write-through mode.

This logic is implemented in r5c_recovery_flush_data_only_stripes():

1. enable write back cache
2. flush all stripes
3. wake up conf->mddev->thread
4. wait for all stripes get flushed (reuse wait_for_quiescent)
5. disable write back cache

The wait in 4 will be waked up in release_inactive_stripe_list()
when conf->active_stripes reaches 0.

It is safe to wake up mddev->thread here because all the resource
required for the thread has been initialized.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
2017-01-24 11:20:15 -08:00
..
bcache bcache: partition support: add 16 minors per bcacheN device 2016-12-17 13:02:00 -07:00
persistent-data dm space map: always set ev if sm_ll_mutate() succeeds 2016-12-08 14:13:15 -05:00
bitmap.c md: separate flags for superblock changes 2016-12-08 22:01:47 -08:00
bitmap.h md-cluster: sync bitmap when node received RESYNCING msg 2016-05-04 12:39:35 -07:00
dm-bio-prison.c
dm-bio-prison.h
dm-bio-record.h
dm-bufio.c . various fixes and improvements to request-based DM and DM multipath 2016-12-14 11:01:00 -08:00
dm-bufio.h
dm-builtin.c dm: move request-based code out to dm-rq.[hc] 2016-06-10 15:15:44 -04:00
dm-cache-block-types.h linux: drop __bitwise__ everywhere 2016-12-16 00:13:41 +02:00
dm-cache-metadata.c dm cache metadata: remove an extra newline in DMERR and code 2016-11-21 09:52:02 -05:00
dm-cache-metadata.h dm cache: make sure every metadata function checks fail_io 2016-03-10 17:12:12 -05:00
dm-cache-policy-cleaner.c dm cache: speed up writing of the hint array 2016-09-22 11:15:02 -04:00
dm-cache-policy-internal.h dm cache: speed up writing of the hint array 2016-09-22 11:15:02 -04:00
dm-cache-policy-smq.c dm cache policy smq: use hash_32() instead of hash_32_generic() 2016-12-08 19:42:37 -05:00
dm-cache-policy.c
dm-cache-policy.h dm cache: speed up writing of the hint array 2016-09-22 11:15:02 -04:00
dm-cache-target.c dm cache: add missing cache device name to DMERR in set_cache_mode() 2016-11-21 09:52:03 -05:00
dm-core.h dm: move request-based code out to dm-rq.[hc] 2016-06-10 15:15:44 -04:00
dm-crypt.c . various fixes and improvements to request-based DM and DM multipath 2016-12-14 11:01:00 -08:00
dm-delay.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-era-target.c block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm-exception-store.c
dm-exception-store.h
dm-flakey.c dm flakey: introduce "error_writes" feature 2016-12-13 15:01:31 -05:00
dm-io.c dm io: use bvec iterator helpers to implement .get_page and .next_page 2016-11-21 09:51:57 -05:00
dm-ioctl.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
dm-kcopyd.c dm: move request-based code out to dm-rq.[hc] 2016-06-10 15:15:44 -04:00
dm-linear.c libnvdimm for 4.8 2016-07-28 17:38:16 -07:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
dm-log.c block,fs: use REQ_* flags directly 2016-11-01 09:43:26 -06:00
dm-mpath.c dm mpath: use hw_handler_params if attached hw_handler is same as requested 2016-12-08 14:13:10 -05:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h dm path selector: remove 'repeat_count' return from .select_path hook 2016-02-22 22:34:42 -05:00
dm-queue-length.c dm path selector: remove 'repeat_count' return from .select_path hook 2016-02-22 22:34:42 -05:00
dm-raid1.c Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block 2016-12-13 10:19:16 -08:00
dm-raid.c . various fixes and improvements to request-based DM and DM multipath 2016-12-14 11:01:00 -08:00
dm-region-hash.c block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm-round-robin.c dm round robin: do not use this_cpu_ptr() without having preemption disabled 2016-08-15 09:23:14 -04:00
dm-rq.c . various fixes and improvements to request-based DM and DM multipath 2016-12-14 11:01:00 -08:00
dm-rq.h dm rq: introduce dm_mq_kick_requeue_list() 2016-09-15 11:16:05 -04:00
dm-service-time.c dm path selector: remove 'repeat_count' return from .select_path hook 2016-02-22 22:34:42 -05:00
dm-snap-persistent.c block,fs: use REQ_* flags directly 2016-11-01 09:43:26 -06:00
dm-snap-transient.c
dm-snap.c block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm-stats.c dm: move request-based code out to dm-rq.[hc] 2016-06-10 15:15:44 -04:00
dm-stats.h
dm-stripe.c block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm-switch.c
dm-sysfs.c dm: move request-based code out to dm-rq.[hc] 2016-06-10 15:15:44 -04:00
dm-table.c dm table: simplify dm_table_determine_type() 2016-12-08 14:13:03 -05:00
dm-target.c libnvdimm for 4.8 2016-07-28 17:38:16 -07:00
dm-thin-metadata.c dm thin: fix a race condition between discarding and provisioning a block 2016-07-20 12:43:35 -04:00
dm-thin-metadata.h dm thin: fix a race condition between discarding and provisioning a block 2016-07-20 12:43:35 -04:00
dm-thin.c block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c dm verity fec: fix block calculation 2016-07-01 23:29:08 -04:00
dm-verity-fec.h
dm-verity-target.c dm verity: fix incorrect error message 2016-11-21 09:52:01 -05:00
dm-verity.h
dm-zero.c block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm.c . various fixes and improvements to request-based DM and DM multipath 2016-12-14 11:01:00 -08:00
dm.h dm: add infrastructure for DAX support 2016-07-20 23:49:49 -04:00
faulty.c MD: rename some functions 2016-01-20 13:52:20 -08:00
Kconfig dm block manager: make block locking optional 2016-11-14 15:17:47 -05:00
linear.c md: add block tracing for bio_remapping 2016-11-18 09:32:50 -08:00
linear.h
Makefile dm: move request-based code out to dm-rq.[hc] 2016-06-10 15:15:44 -04:00
md-cluster.c md-cluster: make resync lock also could be interruptted 2016-09-21 09:09:44 -07:00
md-cluster.h md-cluster: gather resync infos and enable recv_thread after bitmap is ready 2016-05-09 09:24:03 -07:00
md.c md/r5cache: flush data only stripes in r5l_recovery_log() 2017-01-24 11:20:15 -08:00
md.h md: cleanup mddev flag clear for takeover 2017-01-05 11:45:18 -08:00
multipath.c Merge branch 'md-next' into md-linus 2016-12-13 12:40:15 -08:00
multipath.h
raid0.c md: cleanup mddev flag clear for takeover 2017-01-05 11:45:18 -08:00
raid0.h
raid1.c md: cleanup mddev flag clear for takeover 2017-01-05 11:45:18 -08:00
raid1.h md/raid1: add failfast handling for reads. 2016-11-22 09:13:18 -08:00
raid5-cache.c md/r5cache: flush data only stripes in r5l_recovery_log() 2017-01-24 11:20:15 -08:00
raid5.c md/raid5: move comment of fetch_block to right location 2017-01-24 11:20:14 -08:00
raid5.h md/r5cache: read data into orig_page for prexor of cached data 2017-01-24 11:20:14 -08:00
raid10.c md/raid10: Refactor raid10_make_request 2017-01-03 08:56:52 -08:00
raid10.h md/raid10: add failfast handling for reads. 2016-11-22 09:14:28 -08:00