Etienne Dechamps 089fa91bc5 Align DISCARD requests on zvols. ... Currently, when processing DISCARD requests, zvol_discard() calls dmu_free_long_range() with the precise offset and size of the request. Unfortunately, this is not optimal for requests that are not aligned to the zvol block boundaries. Indeed, in the case of an unaligned range, dnode_free_range() will zero out the unaligned parts. Not only is this useless since we are not freeing any space by doing so, it is also slow because it translates to a read-modify-write operation. This patch fixes the issue by rounding up the discard start offset to the next volume block boundary, and rounding down the discard end offset to the previous volume block boundary. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #1010		2012-10-04 16:01:44 -07:00
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avl	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
nvpair	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
unicode	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
zcommon	Illumos #1948: zpool list should show more detailed pool info	2012-09-19 13:39:05 -07:00
zfs	Align DISCARD requests on zvols.	2012-10-04 16:01:44 -07:00
zpios	Add script for builtin module building.	2012-07-26 13:45:09 -07:00
.gitignore	Add .gitignore files to exclude build products	2010-01-08 11:35:17 -08:00
Makefile.in	Add script for builtin module building.	2012-07-26 13:45:09 -07:00