Bug #11052
ZFS Reads may result in unneccesary calls to zil_commit
100%
Description
ZoL commit 2efea7c82c5.
ZFS supports O_RSYNC for read operations and when specified will ensure
the same level of data integrity that O_DSYNC and O_SYNC provides for
writes. O_RSYNC by itself has no effect so it must be combined with
either O_DSYNC or O_SYNC. However, many platforms don't support O_RSYNC
and have mapped O_SYNC to mean O_RSYNC within ZFS. This is incorrect
and causes unnecessary calls to zil_commit. Only platforms which
support O_RSYNC should implement the zil_commit functionality in the
read code path.
History
Updated by Jerry Jelinek 4 months ago
Updated by Overlaps with ZoL
376994828f Fix NULL pointer when O_SYNC read in snapshot
So port that fix as well.
Updated by Jerry Jelinek 3 months ago
This work is essentially a no-op on illumos, but still nice to have to keep the code in sync.
Updated by Electric Monk 3 months ago
Updated by - Status changed from New to Closed
- % Done changed from 0 to 100
git commit da7753c428994e4e6c715886c93d7b49390c3705
commit da7753c428994e4e6c715886c93d7b49390c3705
Author: George Wilson <gwilson@zfsmail.com>
Date: 2019-06-28T16:27:00.000Z
11052 ZFS Reads may result in unneccesary calls to zil_commit
Portions contributed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Andy Fiddaman <andy@omniosce.org>
Approved by: Dan McDonald <danmcd@joyent.com>