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zvol_write() can use dmu_tx_hold_write_by_dnode() #10184

Merged
merged 1 commit into from
Apr 11, 2020
Merged

zvol_write() can use dmu_tx_hold_write_by_dnode() #10184

merged 1 commit into from
Apr 11, 2020

Commits on Apr 6, 2020

  1. zvol_write() can use dmu_tx_hold_write_by_dnode() 

    We can improve the performance of writes to zvols by using
dmu_tx_hold_write_by_dnode() instead of dmu_tx_hold_write().  This
reduces lock contention on the first block of the dnode object, and also
reduces the amount of CPU needed.  The benefit will be highest with
multi-threaded async writes (i.e. writes that don't call zil_commit()).

Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
    @ahrens
    ahrens committed Apr 6, 2020
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