linux/Documentation/device-mapper
Mike Snitzer de7180ff90 dm cache: add support for discard passdown to the origin device
DM cache now defaults to passing discards down to the origin device.
User may disable this using the "no_discard_passdown" feature when
creating the cache device.

If the cache's underlying origin device doesn't support discards then
passdown is disabled (with warning).  Similarly, if the underlying
origin device's max_discard_sectors is less than a cache block discard
passdown will be disabled (this is required because sizing of the cache
internal discard bitset depends on it).

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2019-03-05 14:53:52 -05:00
..
cache-policies.txt dm cache: fix grammar in cache-policies.txt 2018-01-17 09:16:07 -05:00
cache.txt dm cache: add support for discard passdown to the origin device 2019-03-05 14:53:52 -05:00
delay.txt dm delay: add flush as a third class of IO 2018-07-27 15:24:19 -04:00
dm-crypt.txt dm crypt: optionally support larger encryption sector size 2017-03-24 15:54:21 -04:00
dm-flakey.txt dm flakey: Document "error_writes" feature 2018-10-12 11:31:39 -06:00
dm-init.txt dm: add support to directly boot to a mapped device 2019-03-05 14:53:50 -05:00
dm-integrity.txt dm integrity: recalculate checksums on creation 2018-07-27 15:24:27 -04:00
dm-io.txt
dm-log.txt dm log userspace: fix comment hyphens 2011-10-31 20:21:22 +00:00
dm-queue-length.txt dm mpath: add queue length load balancer 2009-06-22 10:12:27 +01:00
dm-raid.txt Documentation: Use "while" instead of "whilst" 2018-11-20 09:30:43 -07:00
dm-service-time.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
dm-uevent.txt dm: uevent generate events 2007-10-20 02:01:26 +01:00
dm-zoned.txt dm zoned: drive-managed zoned block device target 2017-06-19 11:05:20 -04:00
era.txt dm: add era target 2014-03-27 16:56:23 -04:00
kcopyd.txt
linear.txt Documentation/device-mapper: s/getsize/getsz/ 2016-12-14 10:54:27 +01:00
log-writes.txt block: Finish renaming REQ_DISCARD into REQ_OP_DISCARD 2018-10-03 16:12:28 -06:00
persistent-data.txt Documentation: Fix multiple typo in Documentation 2012-03-07 16:08:24 +01:00
snapshot.txt dm snapshot: improve documentation relative to origin suspend requirements 2018-01-17 09:16:06 -05:00
statistics.txt dm stats: fix spelling mistake in Documentation 2016-05-05 15:25:54 -04:00
striped.txt Documentation/device-mapper: s/getsize/getsz/ 2016-12-14 10:54:27 +01:00
switch.txt Documentation/device-mapper: s/getsize/getsz/ 2016-12-14 10:54:27 +01:00
thin-provisioning.txt dm thin: include metadata_low_watermark threshold in pool status 2018-07-30 11:49:08 -04:00
unstriped.txt dm: add unstriped target 2018-01-17 09:16:00 -05:00
verity.txt dm verity: add 'check_at_most_once' option to only validate hashes once 2018-04-03 15:04:29 -04:00
writecache.txt dm writecache: support optional offset for start of device 2018-07-02 16:14:02 -04:00
zero.txt