The patch titled Subject: mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug has been removed from the -mm tree. Its filename was mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug.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/ ------------------------------------------------------ From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> Subject: mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug This cpu hotplug hook was accidentally removed in commit v2.6.30-rc4-18-g00a62ce ("mm: fix Committed_AS underflow on large NR_CPUS environment") The visible effect of this accident: some pages are borrowed in per-cpu page-vectors. Truncate can deal with it, but these pages cannot be reused while this cpu is offline. So this is like a temporary memory leak. Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx> Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> Cc: Eric B Munson <ebmunson@xxxxxxxxxx> Cc: Mel Gorman <mel@xxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Cc: Johannes Weiner <hannes@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/swap.h | 1 + mm/page_alloc.c | 1 + mm/swap.c | 4 ++-- 3 files changed, 4 insertions(+), 2 deletions(-) diff -puN include/linux/swap.h~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug include/linux/swap.h --- a/include/linux/swap.h~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug +++ a/include/linux/swap.h @@ -223,6 +223,7 @@ extern void lru_add_page_tail(struct zon extern void activate_page(struct page *); extern void mark_page_accessed(struct page *); extern void lru_add_drain(void); +extern void lru_add_drain_cpu(int cpu); extern int lru_add_drain_all(void); extern void rotate_reclaimable_page(struct page *page); extern void deactivate_page(struct page *page); diff -puN mm/page_alloc.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug mm/page_alloc.c --- a/mm/page_alloc.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug +++ a/mm/page_alloc.c @@ -4825,6 +4825,7 @@ static int page_alloc_cpu_notify(struct int cpu = (unsigned long)hcpu; if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) { + lru_add_drain_cpu(cpu); drain_pages(cpu); /* diff -puN mm/swap.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug mm/swap.c --- a/mm/swap.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug +++ a/mm/swap.c @@ -496,7 +496,7 @@ static void lru_deactivate_fn(struct pag * Either "cpu" is the current CPU, and preemption has already been * disabled; or "cpu" is being hot-unplugged, and is already dead. */ -static void drain_cpu_pagevecs(int cpu) +void lru_add_drain_cpu(int cpu) { struct pagevec *pvecs = per_cpu(lru_add_pvecs, cpu); struct pagevec *pvec; @@ -553,7 +553,7 @@ void deactivate_page(struct page *page) void lru_add_drain(void) { - drain_cpu_pagevecs(get_cpu()); + lru_add_drain_cpu(get_cpu()); put_cpu(); } _ Patches currently in -mm which might be from khlebnikov@xxxxxxxxxx are origin.patch linux-next.patch mm-fix-page-faults-detection-in-swap-token-logic.patch radix-tree-introduce-bit-optimized-iterator.patch radix-tree-introduce-bit-optimized-iterator-v3.patch radix-tree-introduce-bit-optimized-iterator-v3-fix.patch radix-tree-rewrite-gang-lookup-with-using-iterator.patch radix-tree-use-iterators-in-find_get_pages-functions.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