The following changes since commit b1e6ec0a0fd0252af046e542f91234cd6c30b2cb:
Merge tag 'docs-6.9-fixes' of git://git.lwn.net/linux (2024-04-02 12:44:09 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git/ tags/wq-for-6.9-rc6-fixes
for you to fetch changes up to 91f098704c25106d88706fc9f8bcfce01fdb97df:
workqueue: Fix divide error in wq_update_node_max_active() (2024-04-24 07:23:06 -1000)
----------------------------------------------------------------
workqueue: Fixes for v6.9-rc6
Two doc update patches and the following three fixes:
- On single node systems, the default pool is used but the node_nr_active
for the default pool was set to min_active. This effectively limited the
max concurrency of unbound pools on single node systems to 8 causing
performance regressions on some workloads. Fixed by setting the default
pool's node_nr_active to max_active.
- wq_update_node_max_active() could trigger divide-by-zero if the
intersection between the allowed CPUs for an unbound workqueue and online
CPUs becomes empty.
- When kick_pool() was trying to repatriate a worker to a CPU in its pod by
setting task->wake_cpu, it didn't consider whether the CPU being selected
is online or not which obviously can lead to subobtimal behaviors. On
s390, this triggered a crash in arch code. The workqueue patch removes the
gross misbehavior but doesn't fix the crash completely as there's a race
window in which CPUs can go down after wake_cpu is set. Need to decide
whether the fix should be on the core or arch side.
----------------------------------------------------------------
Audra Mitchell (1):
Documentation/core-api: Update events_freezable_power references.
Lai Jiangshan (1):
workqueue: Fix divide error in wq_update_node_max_active()
Sven Schnelle (1):
workqueue: Fix selection of wake_cpu in kick_pool()
Tejun Heo (1):
workqueue: The default node_nr_active should have its max set to max_active
Xingyou Chen (1):
docs/zh_CN: core-api: Update translation of workqueue.rst to 6.9-rc1
Documentation/core-api/workqueue.rst | 6 +-
.../translations/zh_CN/core-api/workqueue.rst | 398 +++++++++++++++++++--
kernel/workqueue.c | 19 +-
3 files changed, 390 insertions(+), 33 deletions(-)
The pull request you sent on Mon, 29 Apr 2024 12:10:41 -1000:
> git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git/ tags/wq-for-6.9-rc6-fixes
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/98369dccd2f8e16bf4c6621053af7aa4821dcf8e
Thank you!
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