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

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

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

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

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

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00