From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vivek Goyal Subject: [PATCH 8/8] blk-throttle: enable throttling of task while dirtying pages Date: Fri, 3 Jun 2011 17:06:49 -0400 Message-ID: <1307135209-30539-9-git-send-email-vgoyal@redhat.com> References: <1307135209-30539-1-git-send-email-vgoyal@redhat.com> Cc: vgoyal@redhat.com, arighi@develer.com, fengguang.wu@intel.com, jack@suse.cz, akpm@linux-foundation.org To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, axboe@kernel.dk Return-path: In-Reply-To: <1307135209-30539-1-git-send-email-vgoyal@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Put the blk_throtl_dirty_pages() hook in balance_dirty_pages_ratelimited_nr() to enable task throttling. Signed-off-by: Vivek Goyal --- include/linux/blkdev.h | 5 +++++ mm/page-writeback.c | 3 +++ 2 files changed, 8 insertions(+), 0 deletions(-) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index ae9091a..3ad8f5f 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1180,12 +1180,17 @@ static inline uint64_t rq_io_start_time_ns(struct request *req) extern int blk_throtl_init(struct request_queue *q); extern void blk_throtl_exit(struct request_queue *q); extern int blk_throtl_bio(struct request_queue *q, struct bio **bio); +extern void blk_throtl_dirty_pages(struct address_space *mapping, + unsigned long nr_dirty); #else /* CONFIG_BLK_DEV_THROTTLING */ static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio) { return 0; } +static inline void blk_throtl_dirty_pages(struct address_space *mapping, + unsigned long nr_dirty) {} + static inline int blk_throtl_init(struct request_queue *q) { return 0; } static inline int blk_throtl_exit(struct request_queue *q) { return 0; } #endif /* CONFIG_BLK_DEV_THROTTLING */ diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 31f6988..943e551 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -629,6 +629,9 @@ void balance_dirty_pages_ratelimited_nr(struct address_space *mapping, unsigned long ratelimit; unsigned long *p; + /* Subject writes to IO controller throttling */ + blk_throtl_dirty_pages(mapping, nr_pages_dirtied); + ratelimit = ratelimit_pages; if (mapping->backing_dev_info->dirty_exceeded) ratelimit = 8; -- 1.7.4.4