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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-22 04:26:54 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-22 04:26:54 +0300 |
| commit | bcee19f424a0d8c26ecf2607b73c690802658b29 (patch) | |
| tree | c7de7e708d62c3cf0d5542f2a29d486f9d66eeda /block/blk-mq.c | |
| parent | ac2fc4b9d5b7d8e4878c6f04f947d42707f782ef (diff) | |
| parent | 0c986253b939cc14c69d4adbe2b4121bdf4aa220 (diff) | |
| download | linux-bcee19f424a0d8c26ecf2607b73c690802658b29.tar.xz | |
Merge branch 'for-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
"The threadgroup locking changes which went in during 4.2 devel cycle
added write locking of a percpu_rwsem in cgroup task migration path;
unfortunately, that involved expedited rcu syncing which turned out to
be too slow and heavy for certain workloads. The patchset which is
dependent on this one didn't get committed during that devel cycle, so
these two patches can be reverted safely.
Oleg reworked percpu_rwsem for 4.4 so that the writer path is a lot
lighter. The reported issue goes away with Oleg's reworked
percpu_rwsem and I'll reapply these patches on the for-4.4 branch so
that they can land together with Oleg's changes"
* 'for-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
Revert "sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"
Revert "cgroup: simplify threadgroup locking"
Diffstat (limited to 'block/blk-mq.c')
0 files changed, 0 insertions, 0 deletions