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| author |   Yu Kuai <yukuai3@huawei.com> | 2025-02-27 20:16:57 +0800 |
|---|---|---|
| committer |   Yu Kuai <yukuai@kernel.org> | 2025-03-05 00:32:22 +0800 |
| commit | e879a0d9cb086c8e52ce6c04e5bfa63825a6213c (patch) | |
| tree | 1478b060a0adb3d370a54df1137e235e247bfb50 /scripts/gdb/linux/utils.py | |
| parent | md/raid5: merge reshape_progress checking inside get_reshape_loc() (diff) | |
| download | wireguard-linux-e879a0d9cb086c8e52ce6c04e5bfa63825a6213c.tar.xz wireguard-linux-e879a0d9cb086c8e52ce6c04e5bfa63825a6213c.zip | |
md/raid1,raid10: don't ignore IO flags
If blk-wbt is enabled by default, it's found that raid write performance
is quite bad because all IO are throttled by wbt of underlying disks,
due to flag REQ_IDLE is ignored. And turns out this behaviour exist since
blk-wbt is introduced.
Other than REQ_IDLE, other flags should not be ignored as well, for
example REQ_META can be set for filesystems, clearing it can cause priority
reverse problems; And REQ_NOWAIT should not be cleared as well, because
io will wait instead of failing directly in underlying disks.
Fix those problems by keep IO flags from master bio.
Fises: f51d46d0e7cb ("md: add support for REQ_NOWAIT")
Fixes: e34cbd307477 ("blk-wbt: add general throttling mechanism")
Fixes: 5404bc7a87b9 ("[PATCH] Allow file systems to differentiate between data and meta reads")
Link: https://lore.kernel.org/linux-raid/20250227121657.832356-1-yukuai1@huaweicloud.com
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Diffstat (limited to 'scripts/gdb/linux/utils.py')
0 files changed, 0 insertions, 0 deletions