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Date: Thu, 1 May 2014 09:44:43 +0100
From: Mel Gorman <mgorman@...e.de>
To: Linux-MM <linux-mm@...ck.org>,
Linux-FSDevel <linux-fsdevel@...r.kernel.org>
Cc: Johannes Weiner <hannes@...xchg.org>,
Vlastimil Babka <vbabka@...e.cz>, Jan Kara <jack@...e.cz>,
Michal Hocko <mhocko@...e.cz>, Hugh Dickins <hughd@...gle.com>,
Mel Gorman <mgorman@...e.de>,
Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 12/17] mm: page_alloc: Convert hot/cold parameter and immediate callers to bool
cold is a bool, make it one. Make the likely case the "if" part of the
block instead of the else as according to the optimisation manual this
is preferred.
Signed-off-by: Mel Gorman <mgorman@...e.de>
---
arch/tile/mm/homecache.c | 2 +-
fs/fuse/dev.c | 2 +-
include/linux/gfp.h | 4 ++--
include/linux/pagemap.h | 2 +-
include/linux/swap.h | 2 +-
mm/page_alloc.c | 20 ++++++++++----------
mm/swap.c | 4 ++--
mm/swap_state.c | 2 +-
mm/vmscan.c | 6 +++---
9 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c
index 004ba56..33294fd 100644
--- a/arch/tile/mm/homecache.c
+++ b/arch/tile/mm/homecache.c
@@ -417,7 +417,7 @@ void __homecache_free_pages(struct page *page, unsigned int order)
if (put_page_testzero(page)) {
homecache_change_page_home(page, order, PAGE_HOME_HASH);
if (order == 0) {
- free_hot_cold_page(page, 0);
+ free_hot_cold_page(page, false);
} else {
init_page_count(page);
__free_pages(page, order);
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index aac71ce..098f97b 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1614,7 +1614,7 @@ out_finish:
static void fuse_retrieve_end(struct fuse_conn *fc, struct fuse_req *req)
{
- release_pages(req->pages, req->num_pages, 0);
+ release_pages(req->pages, req->num_pages, false);
}
static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 39b81dc..3824ac6 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -369,8 +369,8 @@ void *alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask);
extern void __free_pages(struct page *page, unsigned int order);
extern void free_pages(unsigned long addr, unsigned int order);
-extern void free_hot_cold_page(struct page *page, int cold);
-extern void free_hot_cold_page_list(struct list_head *list, int cold);
+extern void free_hot_cold_page(struct page *page, bool cold);
+extern void free_hot_cold_page_list(struct list_head *list, bool cold);
extern void __free_memcg_kmem_pages(struct page *page, unsigned int order);
extern void free_memcg_kmem_pages(unsigned long addr, unsigned int order);
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 45598f1..9175f52 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -110,7 +110,7 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask)
#define page_cache_get(page) get_page(page)
#define page_cache_release(page) put_page(page)
-void release_pages(struct page **pages, int nr, int cold);
+void release_pages(struct page **pages, int nr, bool cold);
/*
* speculatively take a reference to a page.
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 3507115..da8a250 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -496,7 +496,7 @@ mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout)
#define free_page_and_swap_cache(page) \
page_cache_release(page)
#define free_pages_and_swap_cache(pages, nr) \
- release_pages((pages), (nr), 0);
+ release_pages((pages), (nr), false);
static inline void show_swap_cache_info(void)
{
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 087c178..94c5d06 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1189,7 +1189,7 @@ retry_reserve:
*/
static int rmqueue_bulk(struct zone *zone, unsigned int order,
unsigned long count, struct list_head *list,
- int migratetype, int cold)
+ int migratetype, bool cold)
{
int mt = migratetype, i;
@@ -1208,7 +1208,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
* merge IO requests if the physical pages are ordered
* properly.
*/
- if (likely(cold == 0))
+ if (likely(!cold))
list_add(&page->lru, list);
else
list_add_tail(&page->lru, list);
@@ -1375,9 +1375,9 @@ void mark_free_pages(struct zone *zone)
/*
* Free a 0-order page
- * cold == 1 ? free a cold page : free a hot page
+ * cold == true ? free a cold page : free a hot page
*/
-void free_hot_cold_page(struct page *page, int cold)
+void free_hot_cold_page(struct page *page, bool cold)
{
struct zone *zone = page_zone(page);
struct per_cpu_pages *pcp;
@@ -1409,10 +1409,10 @@ void free_hot_cold_page(struct page *page, int cold)
}
pcp = &this_cpu_ptr(zone->pageset)->pcp;
- if (cold)
- list_add_tail(&page->lru, &pcp->lists[migratetype]);
- else
+ if (!cold)
list_add(&page->lru, &pcp->lists[migratetype]);
+ else
+ list_add_tail(&page->lru, &pcp->lists[migratetype]);
pcp->count++;
if (pcp->count >= pcp->high) {
unsigned long batch = ACCESS_ONCE(pcp->batch);
@@ -1427,7 +1427,7 @@ out:
/*
* Free a list of 0-order pages
*/
-void free_hot_cold_page_list(struct list_head *list, int cold)
+void free_hot_cold_page_list(struct list_head *list, bool cold)
{
struct page *page, *next;
@@ -1544,7 +1544,7 @@ struct page *buffered_rmqueue(struct zone *preferred_zone,
{
unsigned long flags;
struct page *page;
- int cold = !!(gfp_flags & __GFP_COLD);
+ bool cold = ((gfp_flags & __GFP_COLD) != 0);
again:
if (likely(order == 0)) {
@@ -2849,7 +2849,7 @@ void __free_pages(struct page *page, unsigned int order)
{
if (put_page_testzero(page)) {
if (order == 0)
- free_hot_cold_page(page, 0);
+ free_hot_cold_page(page, false);
else
__free_pages_ok(page, order);
}
diff --git a/mm/swap.c b/mm/swap.c
index 9ce43ba..f2228b7 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -67,7 +67,7 @@ static void __page_cache_release(struct page *page)
static void __put_single_page(struct page *page)
{
__page_cache_release(page);
- free_hot_cold_page(page, 0);
+ free_hot_cold_page(page, false);
}
static void __put_compound_page(struct page *page)
@@ -813,7 +813,7 @@ void lru_add_drain_all(void)
* grabbed the page via the LRU. If it did, give up: shrink_inactive_list()
* will free it.
*/
-void release_pages(struct page **pages, int nr, int cold)
+void release_pages(struct page **pages, int nr, bool cold)
{
int i;
LIST_HEAD(pages_to_free);
diff --git a/mm/swap_state.c b/mm/swap_state.c
index e76ace3..2972eee 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -270,7 +270,7 @@ void free_pages_and_swap_cache(struct page **pages, int nr)
for (i = 0; i < todo; i++)
free_swap_cache(pagep[i]);
- release_pages(pagep, todo, 0);
+ release_pages(pagep, todo, false);
pagep += todo;
nr -= todo;
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3f56c8d..8db1318 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1121,7 +1121,7 @@ keep:
VM_BUG_ON_PAGE(PageLRU(page) || PageUnevictable(page), page);
}
- free_hot_cold_page_list(&free_pages, 1);
+ free_hot_cold_page_list(&free_pages, true);
list_splice(&ret_pages, page_list);
count_vm_events(PGACTIVATE, pgactivate);
@@ -1519,7 +1519,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
spin_unlock_irq(&zone->lru_lock);
- free_hot_cold_page_list(&page_list, 1);
+ free_hot_cold_page_list(&page_list, true);
/*
* If reclaim is isolating dirty pages under writeback, it implies
@@ -1740,7 +1740,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
spin_unlock_irq(&zone->lru_lock);
- free_hot_cold_page_list(&l_hold, 1);
+ free_hot_cold_page_list(&l_hold, true);
}
#ifdef CONFIG_SWAP
--
1.8.4.5
--
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