The patch titled
cgroups: add res counter common ancestor searching
has been added to the -mm tree. Its filename is
cgroups-add-res-counter-common-ancestor-searching.patch
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------------------------------------------------------
Subject: cgroups: add res counter common ancestor searching
From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Add a new API to find the common ancestor between two resource counters.
This includes the passed resource counter themselves.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Acked-by: Paul Menage <paul@xxxxxxxxxxxxxx>
Cc: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Aditya Kali <adityakali@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: Tim Hockin <thockin@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/res_counter.h | 2 ++
kernel/res_counter.c | 19 +++++++++++++++++++
2 files changed, 21 insertions(+)
diff -puN include/linux/res_counter.h~cgroups-add-res-counter-common-ancestor-searching include/linux/res_counter.h
--- a/include/linux/res_counter.h~cgroups-add-res-counter-common-ancestor-searching
+++ a/include/linux/res_counter.h
@@ -146,6 +146,8 @@ static inline void res_counter_uncharge(
res_counter_uncharge_until(counter, NULL, val);
}
+struct res_counter *res_counter_common_ancestor(struct res_counter *l, struct res_counter *r);
+
/**
* res_counter_margin - calculate chargeable space of a counter
* @cnt: the counter
diff -puN kernel/res_counter.c~cgroups-add-res-counter-common-ancestor-searching kernel/res_counter.c
--- a/kernel/res_counter.c~cgroups-add-res-counter-common-ancestor-searching
+++ a/kernel/res_counter.c
@@ -92,6 +92,25 @@ void res_counter_uncharge_until(struct r
}
+struct res_counter *
+res_counter_common_ancestor(struct res_counter *r1, struct res_counter *r2)
+{
+ struct res_counter *iter;
+
+ while (r1) {
+ iter = r2;
+ while (iter) {
+ if (iter == r1)
+ return iter;
+ iter = iter->parent;
+ }
+
+ r1 = r1->parent;
+ }
+
+ return NULL;
+}
+
static inline unsigned long long *
res_counter_member(struct res_counter *counter, int member)
{
_
Patches currently in -mm which might be from fweisbec@xxxxxxxxx are
linux-next.patch
tracex86-add-tracepoint-to-x86-timer-interrupt-handler.patch
tracex86-add-x86-irq-vector-entry-exit-tracepoints.patch
cgroups-more-safe-tasklist-locking-in-cgroup_attach_proc.patch
cgroups-fix-ordering-of-calls-in-cgroup_attach_proc.patch
cgroups-add-res_counter_write_u64-api.patch
cgroups-new-resource-counter-inheritance-api.patch
cgroups-add-previous-cgroup-in-can_attach_task-attach_task-callbacks.patch
cgroups-new-cancel_attach_task-subsystem-callback.patch
cgroups-new-cancel_attach_task-subsystem-callback-fix.patch
cgroups-ability-to-stop-res-charge-propagation-on-bounded-ancestor.patch
cgroups-add-res-counter-common-ancestor-searching.patch
cgroups-add-res-counter-common-ancestor-searching-fix.patch
res_counter-allow-charge-failure-pointer-to-be-null.patch
cgroups-pull-up-res-counter-charge-failure-interpretation-to-caller.patch
cgroups-add-a-task-counter-subsystem.patch
cgroups-add-documentation-for-task-counter-subsystem.patch
cgroups-allow-subsystems-to-cancel-a-fork.patch
cgroups-convert-task-counter-to-use-the-subsys-fork-callback.patch
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