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Commit b8c2f347 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

writeback: simplify wakeup_flusher_threads 



bdi_writeback_all only has one caller, so fold it to simplify the code and
flatten the call stack.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
parent d19de7ed

fs/fs-writeback.c

+11 −21
Original line number Diff line number Diff line
@@ -920,42 +920,32 @@ int bdi_writeback_task(struct bdi_writeback *wb) 
}



/*

 * Schedule writeback for all backing devices. This does WB_SYNC_NONE

 * writeback, for integrity writeback see bdi_queue_work_onstack().

 * Start writeback of `nr_pages' pages.  If `nr_pages' is zero, write back

 * the whole world.

 */

static void bdi_writeback_all(struct super_block *sb, long nr_pages)

void wakeup_flusher_threads(long nr_pages)

{

	struct backing_dev_info *bdi;

	struct wb_writeback_args args = {

		.sb		= sb,

		.nr_pages	= nr_pages,

		.sync_mode	= WB_SYNC_NONE,

	};

	struct backing_dev_info *bdi;



	rcu_read_lock();

	if (nr_pages) {

		args.nr_pages = nr_pages;

	} else {

		args.nr_pages = global_page_state(NR_FILE_DIRTY) +

				global_page_state(NR_UNSTABLE_NFS);

	}



	rcu_read_lock();

	list_for_each_entry_rcu(bdi, &bdi_list, bdi_list) {

		if (!bdi_has_dirty_io(bdi))

			continue;



		bdi_alloc_queue_work(bdi, &args);

	}



	rcu_read_unlock();

}



/*

 * Start writeback of `nr_pages' pages.  If `nr_pages' is zero, write back

 * the whole world.

 */

void wakeup_flusher_threads(long nr_pages)

{

	if (nr_pages == 0)

		nr_pages = global_page_state(NR_FILE_DIRTY) +

				global_page_state(NR_UNSTABLE_NFS);

	bdi_writeback_all(NULL, nr_pages);

}



static noinline void block_dump___mark_inode_dirty(struct inode *inode)

{

	if (inode->i_ino || strcmp(inode->i_sb->s_id, "bdev")) {