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authorChunwei Chen <[email protected]>2024-11-06 11:52:01 -0800
committerGitHub <[email protected]>2024-11-06 11:52:01 -0800
commit5945676bcc5d8b45554c93ea08a0d1f654c7075e (patch)
tree6631f47851ff5e81aed233a6577a088e0d32bda1 /config
parent7b6e9675daefcc94393293c46e4672e66490757d (diff)
ZFS send should use spill block prefetched from send_reader_thread
Currently, even though send_reader_thread prefetches spill block, do_dump() will not use it and issues its own blocking arc_read. This causes significant performance degradation when sending datasets with lots of spill blocks. For unmodified spill blocks, we also create send_range struct for them in send_reader_thread and issue prefetches for them. We piggyback them on the dnode send_range instead of enqueueing them so we don't break send_range_after check. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Alexander Motin <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Co-authored-by: david.chen <[email protected]> Closes #16701
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