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Arjan van de Ven 54bab59901 fs: ext4: fsync: optimize double-fsync() a bunch 
There are cases where EXT4 is a bit too conservative sending barriers down to
the disk; there are cases where the transaction in progress is not the one
that sent the barrier (in other words: the fsync is for a file for which the
IO happened more time ago and all data was already sent to the disk).

For that case, a more performing tradeoff can be made on SSD devices (which
have the ability to flush their dram caches in a hurry on a power fail event)
where the barrier gets sent to the disk, but we don't need to wait for the
barrier to complete. Any consecutive IO will block on the barrier correctly.

Signed-off-by: Adam W. Willis <return.of.octobot@gmail.com>
(cherry picked from commit 74aa09a7751e438bd15b5cd73f611021b7239240)
(cherry picked from commit fa3bdf1a32cac074ff52403cb9ce18eb18c7f7d1)
2025-01-16 22:01:03 +01:00
..
partitions Revert "block: print symbolic error name instead of error code" 2024-11-24 00:23:28 +01:00
badblocks.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bfq-cgroup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bfq-iosched.c Revert "block, bfq: fix possible UAF for bfqq->bic with merge chain" 2024-11-24 00:23:28 +01:00
bfq-iosched.h block, bfq: save also injection state on queue merging 2024-11-19 17:43:15 +01:00
bfq-wf2q.c block, bfq: always inject I/O of queues blocked by wakers 2024-11-19 17:41:42 +01:00
bio-integrity.c Revert "block: initialize integrity buffer to zero before writing it to media" 2024-11-24 00:23:47 +01:00
bio.c fs: ext4: fsync: optimize double-fsync() a bunch 2025-01-16 22:01:03 +01:00
blk-cgroup-rwstat.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-cgroup-rwstat.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-cgroup.c cgroup: rstat: punt root-level optimization to individual controllers 2024-11-19 17:40:21 +01:00
blk-core.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-crypto-fallback.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-crypto-internal.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-crypto.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-exec.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-flush.c fs: ext4: fsync: optimize double-fsync() a bunch 2025-01-16 22:01:03 +01:00
blk-integrity.c Revert "block: remove the blk_flush_integrity call in blk_integrity_unregister" 2024-11-24 00:23:47 +01:00
blk-ioc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-iocost.c blk-iocost: Avoid using clamp() on inuse in __propagate_weights() 2025-01-02 17:01:17 +01:00
blk-iolatency.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-ioprio.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-ioprio.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-lib.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-map.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-merge.c blk: Fix lock inversion between ioc lock and bfqd lock 2024-11-19 17:40:26 +01:00
blk-mq-cpumap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-debugfs-zoned.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-debugfs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-debugfs.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-pci.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-rdma.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-sched.c blk: Fix lock inversion between ioc lock and bfqd lock 2024-11-19 17:40:26 +01:00
blk-mq-sched.h blk: Fix lock inversion between ioc lock and bfqd lock 2024-11-19 17:40:26 +01:00
blk-mq-sysfs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-tag.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-tag.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq-virtio.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-mq.c block: fix ordering between checking BLK_MQ_S_STOPPED request adding 2024-12-17 13:24:19 +01:00
blk-mq.h block: fix ordering between checking BLK_MQ_S_STOPPED request adding 2024-12-17 13:24:19 +01:00
blk-pm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-pm.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-rq-qos.c Revert "blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race" 2024-11-24 00:22:52 +01:00
blk-rq-qos.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-sec-stats.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-settings.c block: Clear zone limits for a non-zoned stacked queue 2024-11-19 09:22:16 +01:00
blk-stat.c block: prevent division by zero in blk_rq_stat_sum() 2024-11-19 09:23:14 +01:00
blk-stat.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-sysfs.c Revert "mm: apply init protection" 2024-11-19 18:15:13 +01:00
blk-throttle.c blk-throttle: fix lockdep warning of "cgroup_mutex or RCU read lock required!" 2024-11-18 12:11:56 +01:00
blk-timeout.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-wbt.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-wbt.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk-zoned.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blk.h blk: Fix lock inversion between ioc lock and bfqd lock 2024-11-19 17:40:26 +01:00
bounce.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bsg-lib.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bsg.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cmdline-parser.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
elevator.c block: Do not allow boosters to adjusting scheduler 2025-01-16 21:58:52 +01:00
genhd.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ioctl.c block/ioctl: prefer different overflow check 2024-11-19 14:19:06 +01:00
ioprio.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig.iosched block: Add default I/O scheduler option 2024-11-19 17:43:55 +01:00
keyslot-manager.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kyber-iosched.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mq-deadline-cgroup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mq-deadline-cgroup.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mq-deadline-main.c blk: Fix lock inversion between ioc lock and bfqd lock 2024-11-19 17:40:26 +01:00
opal_proto.h block: sed-opal: handle empty atoms when parsing response 2024-11-19 08:44:36 +01:00
scsi_ioctl.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sed-opal.c block: sed-opal: handle empty atoms when parsing response 2024-11-19 08:44:36 +01:00
ssg-cgroup.c ssg: Set max available ratio to 25 2024-11-17 17:41:50 +01:00
ssg-cgroup.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ssg-iosched.c block: ssg-iosched: adapt to new patches 2024-11-19 17:40:09 +01:00
t10-pi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00