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Dan McDonald
460a021391
As the comments in zvol_discard() suggested, the discard operation could be logged to the zil. This is a port of the relevant code from Nexenta as it was added in "701 UNMAP support for COMSTAR" and has been attributed to the author of that commit. References: https://github.com/Nexenta/illumos-nexenta/commit/b77b923 https://github.com/zfsonlinux/zfs/blob/089fa91b/module/zfs/zvol.c#L637 Ported-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>