The patch titled
cpuset: avoid unnecessary sched domains rebuilding
has been removed from the -mm tree. Its filename was
cpuset-avoid-unnecessary-sched-domains-rebuilding.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: cpuset: avoid unnecessary sched domains rebuilding
From: Li Zefan <lizf@xxxxxxxxxxxxxx>
When changing 'sched_relax_domain_level', don't rebuild sched domains if
'cpus' is empty or 'sched_load_balance' is not set.
Also make the comments of rebuild_sched_domains() more readable.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
Cc: Paul Jackson <pj@xxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/cpuset.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff -puN kernel/cpuset.c~cpuset-avoid-unnecessary-sched-domains-rebuilding kernel/cpuset.c
--- a/kernel/cpuset.c~cpuset-avoid-unnecessary-sched-domains-rebuilding
+++ a/kernel/cpuset.c
@@ -496,11 +496,16 @@ update_domain_attr(struct sched_domain_a
/*
* rebuild_sched_domains()
*
- * If the flag 'sched_load_balance' of any cpuset with non-empty
- * 'cpus' changes, or if the 'cpus' allowed changes in any cpuset
- * which has that flag enabled, or if any cpuset with a non-empty
- * 'cpus' is removed, then call this routine to rebuild the
- * scheduler's dynamic sched domains.
+ * This routine will be called to rebuild the scheduler's dynamic
+ * sched domains:
+ * - if the flag 'sched_load_balance' of any cpuset with non-empty
+ * 'cpus' changes,
+ * - or if the 'cpus' allowed changes in any cpuset which has that
+ * flag enabled,
+ * - or if the 'sched_relax_domain_level' of any cpuset which has
+ * that flag enabled and with non-empty 'cpus' changes,
+ * - or if any cpuset with non-empty 'cpus' is removed,
+ * - or if a cpu gets offlined.
*
* This routine builds a partial partition of the systems CPUs
* (the set of non-overlappping cpumask_t's in the array 'part'
@@ -1076,7 +1081,8 @@ static int update_relax_domain_level(str
if (val != cs->relax_domain_level) {
cs->relax_domain_level = val;
- rebuild_sched_domains();
+ if (!cpus_empty(cs->cpus_allowed) && is_sched_load_balance(cs))
+ rebuild_sched_domains();
}
return 0;
_
Patches currently in -mm which might be from lizf@xxxxxxxxxxxxxx are
origin.patch
linux-next.patch
memrlimit-add-memrlimit-controller-documentation.patch
memrlimit-setup-the-memrlimit-controller.patch
memrlimit-cgroup-mm-owner-callback-changes-to-add-task-info.patch
memrlimit-add-memrlimit-controller-accounting-and-control.patch
memrlimit-improve-error-handling.patch
memrlimit-improve-error-handling-update.patch
memrlimit-handle-attach_task-failure-add-can_attach-callback.patch
introduce-__get_user_pages.patch
introduce-__get_user_pages-fix.patch
split-lru-munlock-rework.patch
revert-to-unevictable-lru-infrastructure-kconfig-fixpatch.patch
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