ZVOL was recently converted to use range locking, but it seems the
comment below wasn't updated:
/*
* There must be no buffer changes when doing a dmu_sync()
* because
* we can't change the data whilst calculating the checksum.
* A better approach than a per zvol rwlock would be to lock
* ranges.
*/
--
Pawel Jakub Dawidek http://www.wheel.pl
pjd at FreeBSD.org http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!
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