K 10 svn:author V 3 mav K 8 svn:date V 27 2015-10-03T08:03:36.457545Z K 7 svn:log V 637 MFC r286705: 5960 zfs recv should prefetch indirect blocks 5925 zfs receive -o origin= Reviewed by: Prakash Surya Reviewed by: Matthew Ahrens Author: Paul Dagnelie While running 'zfs recv' we noticed that every 128th 8K block required a read. We were seeing that restore_write() was calling dmu_tx_hold_write() and the indirect block was not cached. We should prefetch upcoming indirect blocks to avoid having to go to disk and blocking the restore_write(). Allow an incremental send stream to be received as a clone, even if the stream does not mark it as a clone. END