freebsd-nq/scripts
Etienne Dechamps ee5fd0bb80 Set zvol discard_granularity to the volblocksize.
Currently, zvols have a discard granularity set to 0, which suggests to
the upper layer that discard requests of arbirarily small size and
alignment can be made efficiently.

In practice however, ZFS does not handle unaligned discard requests
efficiently: indeed, it is unable to free a part of a block. It will
write zeros to the specified range instead, which is both useless and
inefficient (see dnode_free_range).

With this patch, zvol block devices expose volblocksize as their discard
granularity, so the upper layer is aware that it's not supposed to send
discard requests smaller than volblocksize.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #862
2012-08-07 14:55:31 -07:00
..
zpios-profile Set zvol discard_granularity to the volblocksize. 2012-08-07 14:55:31 -07:00
zpios-test Set zvol discard_granularity to the volblocksize. 2012-08-07 14:55:31 -07:00
zpool-config Set zvol discard_granularity to the volblocksize. 2012-08-07 14:55:31 -07:00
zpool-layout Set zvol discard_granularity to the volblocksize. 2012-08-07 14:55:31 -07:00
common.sh.in Fix zconfig.sh non-optimal alignment 2012-02-09 13:23:28 -08:00
Makefile.am Remove spl/zfs modules as part of cleanup 2010-11-11 11:40:06 -08:00
Makefile.in Set zvol discard_granularity to the volblocksize. 2012-08-07 14:55:31 -07:00
zconfig.sh Fix zconfig.sh non-optimal alignment 2012-02-09 13:23:28 -08:00
zfault.sh Disable 90-zfs.rules for test suite 2011-10-11 14:45:37 -07:00
zfs.sh Add default stack checking 2011-06-13 13:50:21 -07:00
zpios-sanity.sh Disable 90-zfs.rules for test suite 2011-10-11 14:45:37 -07:00
zpios-survey.sh Add linux zpios support 2010-08-31 13:42:01 -07:00
zpios.sh Always unload zpios.ko on exit 2011-06-02 10:25:35 -07:00
zpool-create.sh Add build system 2010-08-31 13:41:27 -07:00