The patch titled
memory cgroup enhancements: add pre_destroy handler
has been removed from the -mm tree. Its filename was
memory-cgroup-enhancements-add-pre_destroy-handler.patch
This patch was dropped because I can't get it to compile - new version after next -mm, please
------------------------------------------------------
Subject: memory cgroup enhancements: add pre_destroy handler
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
My main purpose of this patch is for memory controller..
This patch adds a handler "pre_destroy" to cgroup_subsys.
It is called before cgroup_rmdir() checks all subsys's refcnt.
I think this is useful for subsys which have some extra refs even if there are
no tasks in cgroup. By adding pre_destroy(), the kernel keeps the rule
"destroy() against subsystem is called only when refcnt=0." and allows css ref
to be used by other objects than tasks.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Cc: Pavel Emelianov <xemul@xxxxxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: Kirill Korotaev <dev@xxxxx>
Cc: Herbert Poetzl <herbert@xxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Vaidyanathan Srinivasan <svaidy@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/cgroup.h | 1 +
kernel/cgroup.c | 7 +++++++
2 files changed, 8 insertions(+)
diff -puN include/linux/cgroup.h~memory-cgroup-enhancements-add-pre_destroy-handler include/linux/cgroup.h
--- a/include/linux/cgroup.h~memory-cgroup-enhancements-add-pre_destroy-handler
+++ a/include/linux/cgroup.h
@@ -233,6 +233,7 @@ int cgroup_is_descendant(const struct cg
struct cgroup_subsys {
struct cgroup_subsys_state *(*create)(struct cgroup_subsys *ss,
struct cgroup *cont);
+ void (*pre_destroy)(struct cgroup_subsys *ss, struct cgroup *cont);
void (*destroy)(struct cgroup_subsys *ss, struct cgroup *cont);
int (*can_attach)(struct cgroup_subsys *ss,
struct cgroup *cont, struct task_struct *tsk);
diff -puN kernel/cgroup.c~memory-cgroup-enhancements-add-pre_destroy-handler kernel/cgroup.c
--- a/kernel/cgroup.c~memory-cgroup-enhancements-add-pre_destroy-handler
+++ a/kernel/cgroup.c
@@ -2162,6 +2162,13 @@ static int cgroup_rmdir(struct inode *un
parent = cgrp->parent;
root = cgrp->root;
sb = root->sb;
+ /*
+ * Notify subsyses that rmdir() request comes.
+ */
+ for_each_subsys(root, ss) {
+ if ((cont->subsys[ss->subsys_id]) && ss->pre_destroy)
+ ss->pre_destroy(ss, cont);
+ }
if (cgroup_has_css_refs(cgrp)) {
mutex_unlock(&cgroup_mutex);
_
Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are
origin.patch
memory-hotremove-unset-migrate-type-isolate-after-removal.patch
memory-hotplug-add-removable-to-sysfs-to-show-memblock-removability.patch
add-remove_memory-for-ppc64-2.patch
enable-hotplug-memory-remove-for-ppc64.patch
add-arch-specific-walk_memory_remove-for-ppc64.patch
pie-executable-randomization.patch
pie-executable-randomization-checkpatch-fixes.patch
memory-controller-make-charging-gfp-mask-aware-fix.patch
bugfix-for-memory-cgroup-controller-charge-refcnt-race-fix.patch
bugfix-for-memory-cgroup-controller-fix-error-handling-path-in-mem_charge_cgroup.patch
bugfix-for-memory-controller-add-helper-function-for-assigning-cgroup-to-page.patch
bugfix-for-memory-cgroup-controller-avoid-pagelru-page-in-mem_cgroup_isolate_pages.patch
bugfix-for-memory-cgroup-controller-avoid-pagelru-page-in-mem_cgroup_isolate_pages-fix.patch
bugfix-for-memory-cgroup-controller-migration-under-memory-controller-fix.patch
memory-cgroup-enhancements-fix-zone-handling-in-try_to_free_mem_cgroup_page.patch
memory-cgroup-enhancements-force_empty-interface-for-dropping-all-account-in-empty-cgroup.patch
memory-cgroup-enhancements-remember-a-page-is-charged-as-page-cache.patch
memory-cgroup-enhancements-remember-a-page-is-on-active-list-of-cgroup-or-not.patch
memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup.patch
memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-checkpatch-fixes.patch
memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-fix-1.patch
memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-uninlining.patch
memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-fix-2.patch
memory-cgroup-enhancements-add-memorystat-file.patch
memory-cgroup-enhancements-add-memorystat-file-checkpatch-fixes.patch
memory-cgroup-enhancements-add-pre_destroy-handler.patch
memory-cgroup-enhancements-add-pre_destroy-handler-fix.patch
memory-cgroup-enhancements-implicit-force-empty-at-rmdir.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
