Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755894Ab1FGOjG (ORCPT ); Tue, 7 Jun 2011 10:39:06 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:55700 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755792Ab1FGOjC (ORCPT ); Tue, 7 Jun 2011 10:39:02 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=Nkev49C4bdirc/3WoqgX3NdBw4U6tygf7BV34/WlSB73jLLic2QM+4oosxN2tcMIJx MiobLvqNw5F3yj8iuUsFTn3QiHnVCRqGWqqXYCgsYu506sZKtlOlJ2/XAoVvqKMo2WfF sXYsPmNG3Ztnqv6OfQ4a/Hc4MGNne83vXB7rU= From: Minchan Kim To: Andrew Morton Cc: linux-mm , LKML , KOSAKI Motohiro , Mel Gorman , Andrea Arcangeli , Rik van Riel , Johannes Weiner , KAMEZAWA Hiroyuki , Minchan Kim Subject: [PATCH v3 02/10] Change isolate mode from int type to enum type Date: Tue, 7 Jun 2011 23:38:15 +0900 Message-Id: <4eee88f894f0553aedb696d667967adb7dcf29ab.1307455422.git.minchan.kim@gmail.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9460 Lines: 266 This patch changes macro define with enum variable. Normally, enum is preferred as it's type-safe and making debugging easier as symbol can be passed throught to the debugger. This patch doesn't change old behavior. It is used by next patches. Cc: KOSAKI Motohiro Cc: Mel Gorman Cc: Rik van Riel Cc: Andrea Arcangeli Cc: Johannes Weiner Cc: KAMEZAWA Hiroyuki Signed-off-by: Minchan Kim --- include/linux/memcontrol.h | 5 ++++- include/linux/swap.h | 11 +++++++---- include/trace/events/vmscan.h | 8 ++++---- mm/compaction.c | 3 ++- mm/memcontrol.c | 3 ++- mm/migrate.c | 4 ++-- mm/vmscan.c | 37 ++++++++++++++++++++----------------- 7 files changed, 41 insertions(+), 30 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 5e9840f..91a1162 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -30,10 +30,13 @@ enum mem_cgroup_page_stat_item { MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ }; +enum ISOLATE_MODE; + extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, struct list_head *dst, unsigned long *scanned, int order, - int mode, struct zone *z, + enum ISOLATE_MODE mode, + struct zone *z, struct mem_cgroup *mem_cont, int active, int file); diff --git a/include/linux/swap.h b/include/linux/swap.h index a5c6da5..48d50e6 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -244,9 +244,11 @@ static inline void lru_cache_add_file(struct page *page) } /* LRU Isolation modes. */ -#define ISOLATE_INACTIVE 0 /* Isolate inactive pages. */ -#define ISOLATE_ACTIVE 1 /* Isolate active pages. */ -#define ISOLATE_BOTH 2 /* Isolate both active and inactive pages. */ +enum ISOLATE_MODE { + ISOLATE_NONE, + ISOLATE_INACTIVE = 1, /* Isolate inactive pages */ + ISOLATE_ACTIVE = 2, /* Isolate active pages */ +}; /* linux/mm/vmscan.c */ extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order, @@ -258,7 +260,8 @@ extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem, gfp_t gfp_mask, bool noswap, unsigned int swappiness, struct zone *zone); -extern int __isolate_lru_page(struct page *page, int mode, int file); +extern int __isolate_lru_page(struct page *page, enum ISOLATE_MODE mode, + int file); extern unsigned long shrink_all_memory(unsigned long nr_pages); extern int vm_swappiness; extern int remove_mapping(struct address_space *mapping, struct page *page); diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h index ea422aa..4f53d43 100644 --- a/include/trace/events/vmscan.h +++ b/include/trace/events/vmscan.h @@ -187,7 +187,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template, unsigned long nr_lumpy_taken, unsigned long nr_lumpy_dirty, unsigned long nr_lumpy_failed, - int isolate_mode), + enum ISOLATE_MODE isolate_mode), TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode), @@ -199,7 +199,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template, __field(unsigned long, nr_lumpy_taken) __field(unsigned long, nr_lumpy_dirty) __field(unsigned long, nr_lumpy_failed) - __field(int, isolate_mode) + __field(enum ISOLATE_MODE, isolate_mode) ), TP_fast_assign( @@ -233,7 +233,7 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate, unsigned long nr_lumpy_taken, unsigned long nr_lumpy_dirty, unsigned long nr_lumpy_failed, - int isolate_mode), + enum ISOLATE_MODE isolate_mode), TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode) @@ -248,7 +248,7 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate, unsigned long nr_lumpy_taken, unsigned long nr_lumpy_dirty, unsigned long nr_lumpy_failed, - int isolate_mode), + enum ISOLATE_MODE isolate_mode), TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode) diff --git a/mm/compaction.c b/mm/compaction.c index 61eab88..f0d75e9 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -327,7 +327,8 @@ static unsigned long isolate_migratepages(struct zone *zone, } /* Try isolate the page */ - if (__isolate_lru_page(page, ISOLATE_BOTH, 0) != 0) + if (__isolate_lru_page(page, + ISOLATE_ACTIVE|ISOLATE_INACTIVE, 0) != 0) continue; VM_BUG_ON(PageTransCompound(page)); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 010f916..f4c0b71 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1106,7 +1106,8 @@ mem_cgroup_get_reclaim_stat_from_page(struct page *page) unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, struct list_head *dst, unsigned long *scanned, int order, - int mode, struct zone *z, + enum ISOLATE_MODE mode, + struct zone *z, struct mem_cgroup *mem_cont, int active, int file) { diff --git a/mm/migrate.c b/mm/migrate.c index 819d233..e797b5c 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1363,10 +1363,10 @@ int migrate_vmas(struct mm_struct *mm, const nodemask_t *to, for (vma = mm->mmap; vma && !err; vma = vma->vm_next) { if (vma->vm_ops && vma->vm_ops->migrate) { - err = vma->vm_ops->migrate(vma, to, from, flags); + err = vma->vm_ops->migrate(vma, to, from, flags); if (err) break; - } + } } return err; } diff --git a/mm/vmscan.c b/mm/vmscan.c index a658dde..4cbe114 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -957,23 +957,27 @@ keep_lumpy: * * returns 0 on success, -ve errno on failure. */ -int __isolate_lru_page(struct page *page, int mode, int file) +int __isolate_lru_page(struct page *page, enum ISOLATE_MODE mode, int file) { + bool all_lru_mode; int ret = -EINVAL; /* Only take pages on the LRU. */ if (!PageLRU(page)) return ret; + all_lru_mode = (mode & (ISOLATE_ACTIVE|ISOLATE_INACTIVE)) == + (ISOLATE_ACTIVE|ISOLATE_INACTIVE); + /* * When checking the active state, we need to be sure we are * dealing with comparible boolean values. Take the logical not * of each. */ - if (mode != ISOLATE_BOTH && (!PageActive(page) != !mode)) + if (!all_lru_mode && !PageActive(page) != !(mode & ISOLATE_ACTIVE)) return ret; - if (mode != ISOLATE_BOTH && page_is_file_cache(page) != file) + if (!all_lru_mode && !!page_is_file_cache(page) != file) return ret; /* @@ -1021,7 +1025,8 @@ int __isolate_lru_page(struct page *page, int mode, int file) */ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, struct list_head *src, struct list_head *dst, - unsigned long *scanned, int order, int mode, int file) + unsigned long *scanned, int order, enum ISOLATE_MODE mode, + int file) { unsigned long nr_taken = 0; unsigned long nr_lumpy_taken = 0; @@ -1134,8 +1139,8 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, static unsigned long isolate_pages_global(unsigned long nr, struct list_head *dst, unsigned long *scanned, int order, - int mode, struct zone *z, - int active, int file) + enum ISOLATE_MODE mode, + struct zone *z, int active, int file) { int lru = LRU_BASE; if (active) @@ -1382,6 +1387,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone, unsigned long nr_taken; unsigned long nr_anon; unsigned long nr_file; + enum ISOLATE_MODE reclaim_mode = ISOLATE_INACTIVE; while (unlikely(too_many_isolated(zone, file, sc))) { congestion_wait(BLK_RW_ASYNC, HZ/10); @@ -1392,15 +1398,15 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone, } set_reclaim_mode(priority, sc, false); + if (sc->reclaim_mode & RECLAIM_MODE_LUMPYRECLAIM) + reclaim_mode |= ISOLATE_ACTIVE; + lru_add_drain(); spin_lock_irq(&zone->lru_lock); if (scanning_global_lru(sc)) { - nr_taken = isolate_pages_global(nr_to_scan, - &page_list, &nr_scanned, sc->order, - sc->reclaim_mode & RECLAIM_MODE_LUMPYRECLAIM ? - ISOLATE_BOTH : ISOLATE_INACTIVE, - zone, 0, file); + nr_taken = isolate_pages_global(nr_to_scan, &page_list, + &nr_scanned, sc->order, reclaim_mode, zone, 0, file); zone->pages_scanned += nr_scanned; if (current_is_kswapd()) __count_zone_vm_events(PGSCAN_KSWAPD, zone, @@ -1409,12 +1415,9 @@ shrink_inactive_list(unsigned long nr_to_scan, struct zone *zone, __count_zone_vm_events(PGSCAN_DIRECT, zone, nr_scanned); } else { - nr_taken = mem_cgroup_isolate_pages(nr_to_scan, - &page_list, &nr_scanned, sc->order, - sc->reclaim_mode & RECLAIM_MODE_LUMPYRECLAIM ? - ISOLATE_BOTH : ISOLATE_INACTIVE, - zone, sc->mem_cgroup, - 0, file); + nr_taken = mem_cgroup_isolate_pages(nr_to_scan, &page_list, + &nr_scanned, sc->order, reclaim_mode, zone, + sc->mem_cgroup, 0, file); /* * mem_cgroup_isolate_pages() keeps track of * scanned pages on its own. -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/