diff options
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 58 |
1 files changed, 21 insertions, 37 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index e0c943014eb7..19ceae87522d 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -261,14 +261,11 @@ static unsigned long global_dirtyable_memory(void) */ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty) { + const unsigned long available_memory = global_dirtyable_memory(); unsigned long background; unsigned long dirty; - unsigned long uninitialized_var(available_memory); struct task_struct *tsk; - if (!vm_dirty_bytes || !dirty_background_bytes) - available_memory = global_dirtyable_memory(); - if (vm_dirty_bytes) dirty = DIV_ROUND_UP(vm_dirty_bytes, PAGE_SIZE); else @@ -1078,13 +1075,13 @@ static void bdi_update_dirty_ratelimit(struct backing_dev_info *bdi, } if (dirty < setpoint) { - x = min(bdi->balanced_dirty_ratelimit, - min(balanced_dirty_ratelimit, task_ratelimit)); + x = min3(bdi->balanced_dirty_ratelimit, + balanced_dirty_ratelimit, task_ratelimit); if (dirty_ratelimit < x) step = x - dirty_ratelimit; } else { - x = max(bdi->balanced_dirty_ratelimit, - max(balanced_dirty_ratelimit, task_ratelimit)); + x = max3(bdi->balanced_dirty_ratelimit, + balanced_dirty_ratelimit, task_ratelimit); if (dirty_ratelimit > x) step = dirty_ratelimit - x; } @@ -1780,7 +1777,7 @@ void __init page_writeback_init(void) writeback_set_ratelimit(); register_cpu_notifier(&ratelimit_nb); - fprop_global_init(&writeout_completions); + fprop_global_init(&writeout_completions, GFP_KERNEL); } /** @@ -2119,23 +2116,6 @@ void account_page_dirtied(struct page *page, struct address_space *mapping) EXPORT_SYMBOL(account_page_dirtied); /* - * Helper function for set_page_writeback family. - * - * The caller must hold mem_cgroup_begin/end_update_page_stat() lock - * while calling this function. - * See test_set_page_writeback for example. - * - * NOTE: Unlike account_page_dirtied this does not rely on being atomic - * wrt interrupts. - */ -void account_page_writeback(struct page *page) -{ - mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_WRITEBACK); - inc_zone_page_state(page, NR_WRITEBACK); -} -EXPORT_SYMBOL(account_page_writeback); - -/* * For address_spaces which do not use buffers. Just tag the page as dirty in * its radix tree. * @@ -2347,11 +2327,12 @@ EXPORT_SYMBOL(clear_page_dirty_for_io); int test_clear_page_writeback(struct page *page) { struct address_space *mapping = page_mapping(page); - int ret; - bool locked; unsigned long memcg_flags; + struct mem_cgroup *memcg; + bool locked; + int ret; - mem_cgroup_begin_update_page_stat(page, &locked, &memcg_flags); + memcg = mem_cgroup_begin_page_stat(page, &locked, &memcg_flags); if (mapping) { struct backing_dev_info *bdi = mapping->backing_dev_info; unsigned long flags; @@ -2372,22 +2353,23 @@ int test_clear_page_writeback(struct page *page) ret = TestClearPageWriteback(page); } if (ret) { - mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_WRITEBACK); + mem_cgroup_dec_page_stat(memcg, MEM_CGROUP_STAT_WRITEBACK); dec_zone_page_state(page, NR_WRITEBACK); inc_zone_page_state(page, NR_WRITTEN); } - mem_cgroup_end_update_page_stat(page, &locked, &memcg_flags); + mem_cgroup_end_page_stat(memcg, locked, memcg_flags); return ret; } int __test_set_page_writeback(struct page *page, bool keep_write) { struct address_space *mapping = page_mapping(page); - int ret; - bool locked; unsigned long memcg_flags; + struct mem_cgroup *memcg; + bool locked; + int ret; - mem_cgroup_begin_update_page_stat(page, &locked, &memcg_flags); + memcg = mem_cgroup_begin_page_stat(page, &locked, &memcg_flags); if (mapping) { struct backing_dev_info *bdi = mapping->backing_dev_info; unsigned long flags; @@ -2413,9 +2395,11 @@ int __test_set_page_writeback(struct page *page, bool keep_write) } else { ret = TestSetPageWriteback(page); } - if (!ret) - account_page_writeback(page); - mem_cgroup_end_update_page_stat(page, &locked, &memcg_flags); + if (!ret) { + mem_cgroup_inc_page_stat(memcg, MEM_CGROUP_STAT_WRITEBACK); + inc_zone_page_state(page, NR_WRITEBACK); + } + mem_cgroup_end_page_stat(memcg, locked, memcg_flags); return ret; } |