The patch titled Subject: memcg: free spare array to avoid memory leak has been added to the -mm tree. Its filename is memcg-free-spare-array-to-avoid-memory-leak.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Sha Zhengju <handai.szj@xxxxxxxxxx> Subject: memcg: free spare array to avoid memory leak When the last event is unregistered, there is no need to keep the spare array anymore. So free it to avoid memory leak. Signed-off-by: Sha Zhengju <handai.szj@xxxxxxxxxx> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Reviewed-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memcontrol.c | 6 ++++++ 1 file changed, 6 insertions(+) diff -puN mm/memcontrol.c~memcg-free-spare-array-to-avoid-memory-leak mm/memcontrol.c --- a/mm/memcontrol.c~memcg-free-spare-array-to-avoid-memory-leak +++ a/mm/memcontrol.c @@ -4523,6 +4523,12 @@ static void mem_cgroup_usage_unregister_ swap_buffers: /* Swap primary and spare array */ thresholds->spare = thresholds->primary; + /* If all events are unregistered, free the spare array */ + if (!new) { + kfree(thresholds->spare); + thresholds->spare = NULL; + } + rcu_assign_pointer(thresholds->primary, new); /* To be sure that nobody uses thresholds */ _ Subject: Subject: memcg: free spare array to avoid memory leak Patches currently in -mm which might be from handai.szj@xxxxxxxxxx are memcg-free-spare-array-to-avoid-memory-leak.patch memcg-make-threshold-index-in-the-right-position.patch memcg-revise-the-position-of-threshold-index-while-unregistering-event.patch eventfd-change-int-to-__u64-in-eventfd_signal.patch eventfd-change-int-to-__u64-in-eventfd_signal-fix.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