diff options
| -rw-r--r-- | fs/fs-writeback.c | 32 | ||||
| -rw-r--r-- | include/linux/backing-dev.h | 4 | ||||
| -rw-r--r-- | mm/page-writeback.c | 5 |
3 files changed, 24 insertions, 17 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 4fcca4f7494..0079bf59b58 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -200,7 +200,6 @@ static void bdi_queue_work_onstack(struct wb_writeback_args *args) /** * bdi_start_writeback - start writeback * @bdi: the backing device to write from - * @sb: write inodes from this super_block * @nr_pages: the number of pages to write * * Description: @@ -209,25 +208,34 @@ static void bdi_queue_work_onstack(struct wb_writeback_args *args) * completion. Caller need not hold sb s_umount semaphore. * */ -void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb, - long nr_pages) +void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages) { struct wb_writeback_args args = { - .sb = sb, .sync_mode = WB_SYNC_NONE, .nr_pages = nr_pages, .range_cyclic = 1, }; - /* - * We treat @nr_pages=0 as the special case to do background writeback, - * ie. to sync pages until the background dirty threshold is reached. - */ - if (!nr_pages) { - args.nr_pages = LONG_MAX; - args.for_background = 1; - } + bdi_alloc_queue_work(bdi, &args); +} +/** + * bdi_start_background_writeback - start background writeback + * @bdi: the backing device to write from + * + * Description: + * This does WB_SYNC_NONE background writeback. The IO is only + * started when this function returns, we make no guarentees on + * completion. Caller need not hold sb s_umount semaphore. + */ +void bdi_start_background_writeback(struct backing_dev_info *bdi) +{ + struct wb_writeback_args args = { + .sync_mode = WB_SYNC_NONE, + .nr_pages = LONG_MAX, + .for_background = 1, + .range_cyclic = 1, + }; bdi_alloc_queue_work(bdi, &args); } diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index aee5f6ce166..9ae2889096b 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -105,8 +105,8 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent, int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev); void bdi_unregister(struct backing_dev_info *bdi); int bdi_setup_and_register(struct backing_dev_info *, char *, unsigned int); -void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb, - long nr_pages); +void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages); +void bdi_start_background_writeback(struct backing_dev_info *bdi); int bdi_writeback_task(struct bdi_writeback *wb); int bdi_has_dirty_io(struct backing_dev_info *bdi); void bdi_arm_supers_timer(void); diff --git a/mm/page-writeback.c b/mm/page-writeback.c index bbd396ac954..54f28bd493d 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -597,7 +597,7 @@ static void balance_dirty_pages(struct address_space *mapping, (!laptop_mode && ((global_page_state(NR_FILE_DIRTY) + global_page_state(NR_UNSTABLE_NFS)) > background_thresh))) - bdi_start_writeback(bdi, NULL, 0); + bdi_start_background_writeback(bdi); } void set_page_dirty_balance(struct page *page, int page_mkwrite) @@ -705,9 +705,8 @@ void laptop_mode_timer_fn(unsigned long data) * We want to write everything out, not just down to the dirty * threshold */ - if (bdi_has_dirty_io(&q->backing_dev_info)) - bdi_start_writeback(&q->backing_dev_info, NULL, nr_pages); + bdi_start_writeback(&q->backing_dev_info, nr_pages); } /* |