3 Commits

Author	SHA1	Message	Date
Zdenek Kabelac	e3c4ab0cc7	cache: support no_discard_passdown ... Recent kernel version from kernel commit: de7180ff908b2bc0342e832dbdaa9a5f1ecaa33a started to report in cache status line new flag: no_discard_passdown Whenever lvm spots unknown status it reports: Unknown feature in status: So add reconginzing this feature flag and also report this with 'lvs -o+kernel_discards' When no_discard_passdown is found in status 'nopassdown' gets reported for this field (roughly matching what we report for thin-pools).	2019-06-05 15:48:41 +02:00
David Teigland	3ae5569570	Add dm-writecache support ... dm-writecache is used like dm-cache with a standard LV as the cache. $ lvcreate -n main -L 128M -an foo /dev/loop0 $ lvcreate -n fast -L 32M -an foo /dev/pmem0 $ lvconvert --type writecache --cachepool fast foo/main $ lvs -a foo -o+devices LV VG Attr LSize Origin Devices [fast] foo -wi------- 32.00m /dev/pmem0(0) main foo Cwi------- 128.00m [main_wcorig] main_wcorig(0) [main_wcorig] foo -wi------- 128.00m /dev/loop0(0) $ lvchange -ay foo/main $ dmsetup table foo-main_wcorig: 0 262144 linear 7:0 2048 foo-main: 0 262144 writecache p 253:4 253:3 4096 0 foo-fast: 0 65536 linear 259:0 2048 $ lvchange -an foo/main $ lvconvert --splitcache foo/main $ lvs -a foo -o+devices LV VG Attr LSize Devices fast foo -wi------- 32.00m /dev/pmem0(0) main foo -wi------- 128.00m /dev/loop0(0)	2018-11-06 14:18:41 -06:00
Joe Thornber	ccc35e2647	device-mapper: Fork libdm internally. ... The device-mapper directory now holds a copy of libdm source. At the moment this code is identical to libdm. Over time code will migrate out to appropriate places (see doc/refactoring.txt). The libdm directory still exists, and contains the source for the libdevmapper shared library, which we will continue to ship (though not neccessarily update). All code using libdm should now use the version in device-mapper.	2018-05-16 13:00:50 +01:00