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| author | Chandan Babu R <chandanbabu@kernel.org> | 2023-09-13 07:41:44 +0300 |
|---|---|---|
| committer | Chandan Babu R <chandanbabu@kernel.org> | 2023-09-13 07:41:44 +0300 |
| commit | 0a229c935a8a0e0af1447f93128201bbfd3bb171 (patch) | |
| tree | d3897cef3938081847baa51a7835a968eaa4a3f0 /include/linux/lcm.h | |
| parent | da6f8410e73ebcdcdbcaf2d1bba0646193291e6b (diff) | |
| parent | ef7d9593390a050c50eba5fc02d2cb65a1104434 (diff) | |
| download | linux-0a229c935a8a0e0af1447f93128201bbfd3bb171.tar.xz | |
Merge tag 'fix-percpu-lists-6.6_2023-09-12' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.6-fixesA
xfs: fix cpu hotplug mess
Ritesh and Eric separately reported crashes in XFS's hook function for
CPU hot remove if the remove event races with a filesystem being
mounted. I also noticed via generic/650 that once in a while the log
will shut down over an apparent overrun of a transaction reservation;
this turned out to be due to CIL percpu list aggregation failing to pick
up the percpu list items from a dying CPU.
Either way, the solution here is to eliminate the need for a CPU dying
hook by using a private cpumask to track which CPUs have added to their
percpu lists directly, and iterating with that mask. This fixes the log
problems and (I think) solves a theoretical UAF bug in the inodegc code
too.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
* tag 'fix-percpu-lists-6.6_2023-09-12' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
xfs: remove CPU hotplug infrastructure
xfs: remove the all-mounts list
xfs: use per-mount cpumask to track nonempty percpu inodegc lists
xfs: fix per-cpu CIL structure aggregation racing with dying cpus
Diffstat (limited to 'include/linux/lcm.h')
0 files changed, 0 insertions, 0 deletions