The patch titled
memory cgroup enhancements: add pre_destroy handler
has been added to the -mm tree. Its filename is
memory-cgroup-enhancements-add-pre_destroy-handler.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
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------------------------------------------------------
Subject: memory cgroup enhancements: add pre_destroy handler
From: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]>
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 <[EMAIL PROTECTED]>
Cc: Balbir Singh <[EMAIL PROTECTED]>
Cc: Pavel Emelianov <[EMAIL PROTECTED]>
Cc: Paul Menage <[EMAIL PROTECTED]>
Cc: Peter Zijlstra <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Cc: Nick Piggin <[EMAIL PROTECTED]>
Cc: Kirill Korotaev <[EMAIL PROTECTED]>
Cc: Herbert Poetzl <[EMAIL PROTECTED]>
Cc: David Rientjes <[EMAIL PROTECTED]>
Cc: Vaidyanathan Srinivasan <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
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 [EMAIL PROTECTED] are
git-sh.patch
memory-hotplug-add-removable-to-sysfs-to-show-memblock-removability.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-implicit-force-empty-at-rmdir.patch
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