Description
In the Linux kernel, the following vulnerability has been resolved: 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")
Product status
5404bc7a87b9949cf61e0174b21f80e73239ab25 (git) before 10f4ff4baeb6951cf58282954318827b6852d501
5404bc7a87b9949cf61e0174b21f80e73239ab25 (git) before 73506e581c0b1814cdfd2229d589f30751d7de26
5404bc7a87b9949cf61e0174b21f80e73239ab25 (git) before 8a0adf3d778c4a0893c6d34a9e1b0082a6f1c495
5404bc7a87b9949cf61e0174b21f80e73239ab25 (git) before e879a0d9cb086c8e52ce6c04e5bfa63825a6213c
2.6.19
Any version before 2.6.19
6.6.136 (semver)
6.12.46 (semver)
6.14.2 (semver)
6.15 (original_commit_for_fix)
References
git.kernel.org/...c/10f4ff4baeb6951cf58282954318827b6852d501
git.kernel.org/...c/73506e581c0b1814cdfd2229d589f30751d7de26
git.kernel.org/...c/8a0adf3d778c4a0893c6d34a9e1b0082a6f1c495
git.kernel.org/...c/e879a0d9cb086c8e52ce6c04e5bfa63825a6213c