From 36715cef0770b7e2547892b7c3197fc024274630 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Sat, 11 Jun 2011 17:53:57 -0600 Subject: [PATCH] writeback: skip tmpfs early in balance_dirty_pages_ratelimited_nr() This helps prevent tmpfs dirtiers from skewing the per-cpu bdp_ratelimits. Acked-by: Jan Kara Signed-off-by: Wu Fengguang --- mm/page-writeback.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index b2529f8..1965d05 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -490,9 +490,6 @@ static void balance_dirty_pages(struct address_space *mapping, bool dirty_exceeded = false; struct backing_dev_info *bdi = mapping->backing_dev_info; - if (!bdi_cap_account_dirty(bdi)) - return; - for (;;) { struct writeback_control wbc = { .sync_mode = WB_SYNC_NONE, @@ -631,9 +628,13 @@ static DEFINE_PER_CPU(unsigned long, bdp_ratelimits) = 0; void balance_dirty_pages_ratelimited_nr(struct address_space *mapping, unsigned long nr_pages_dirtied) { + struct backing_dev_info *bdi = mapping->backing_dev_info; unsigned long ratelimit; unsigned long *p; + if (!bdi_cap_account_dirty(bdi)) + return; + ratelimit = ratelimit_pages; if (mapping->backing_dev_info->dirty_exceeded) ratelimit = 8; -- 2.7.4