Branch: refs/heads/master
Home: https://github.com/qemu/qemu
Commit: 2c3165a1a61c299b4a3ae30899e1cc738d20e004
https://github.com/qemu/qemu/commit/2c3165a1a61c299b4a3ae30899e1cc738d20e004
Author: Kevin Wolf <[email protected]>
Date: 2025-12-04 (Thu, 04 Dec 2025)
Changed paths:
M block/file-posix.c
Log Message:
-----------
file-posix: Handle suspended dm-multipath better for SG_IO
When introducing DM_MPATH_PROBE_PATHS, we already anticipated that
dm-multipath devices might be suspended for a short time when the DM
tables are reloaded and that they return -EAGAIN in this case. We then
wait for a millisecond and retry.
However, meanwhile it has also turned out that libmpathpersist (which is
used by qemu-pr-helper) may need to perform more complex recovery
operations to get reservations back to expected state if a path failure
happened in the middle of a PR operation. In this case, the device is
suspended for a longer time compared to the case we originally expected.
This patch changes hdev_co_ioctl() to treat -EAGAIN separately so that
it doesn't result in an immediate failure if the device is suspended for
more than 1ms, and moves to incremental backoff to cover both quick and
slow cases without excessive delays.
Buglink: https://issues.redhat.com/browse/RHEL-121543
Signed-off-by: Kevin Wolf <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Kevin Wolf <[email protected]>
Commit: 864814f71b4cbb2e65bc83a502e63b3cbdd43b0f
https://github.com/qemu/qemu/commit/864814f71b4cbb2e65bc83a502e63b3cbdd43b0f
Author: Richard Henderson <[email protected]>
Date: 2025-12-04 (Thu, 04 Dec 2025)
Changed paths:
M block/file-posix.c
Log Message:
-----------
Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging
Block layer patches
- SCSI passthrough: Fix errors on temporarily suspended dm-multipath
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# gpg: Signature made Thu 04 Dec 2025 11:35:45 AM CST
# gpg: using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg: issuer "[email protected]"
# gpg: Good signature from "Kevin Wolf <[email protected]>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6
* tag 'for-upstream' of https://repo.or.cz/qemu/kevin:
file-posix: Handle suspended dm-multipath better for SG_IO
Signed-off-by: Richard Henderson <[email protected]>
Compare: https://github.com/qemu/qemu/compare/1053bb627cf5...864814f71b4c
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