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73506e581c
commite879a0d9cbupstream. 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:f51d46d0e7("md: add support for REQ_NOWAIT") Fixes:e34cbd3074("blk-wbt: add general throttling mechanism") Fixes:5404bc7a87("[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> [ Harshit: Resolve conflicts due to missing commit:f2a38abf5f("md/raid1: Atomic write support") and commit:a1d9b4fd42("md/raid10: Atomic write support") in 6.12.y, we don't have Atomic writes feature in 6.12.y ] Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3484 lines
93 KiB
3484 lines
93 KiB