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writeback: simplify wakeup_flusher_threads

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

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Christoph Hellwig 2010-06-08 18:15:07 +02:00 • committed by Jens Axboe
parent d19de7edf5
commit b8c2f3474f
1 changed files with 18 additions and 28 deletions
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46
fs/fs-writeback.c
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@ -919,41 +919,31 @@ int bdi_writeback_task(struct bdi_writeback *wb)
return 0; return 0;
} }
/*
* Schedule writeback for all backing devices. This does WB_SYNC_NONE
* writeback, for integrity writeback see bdi_queue_work_onstack().
*/
static void bdi_writeback_all(struct super_block *sb, long nr_pages)
{
struct wb_writeback_args args = {
.sb = sb,
.nr_pages = nr_pages,
.sync_mode = WB_SYNC_NONE,
};
struct backing_dev_info *bdi;
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 * Start writeback of `nr_pages' pages. If `nr_pages' is zero, write back
* the whole world. * the whole world.
*/ */
void wakeup_flusher_threads(long nr_pages) void wakeup_flusher_threads(long nr_pages)
{ {
if (nr_pages == 0) struct backing_dev_info *bdi;
nr_pages = global_page_state(NR_FILE_DIRTY) + struct wb_writeback_args args = {
.sync_mode = WB_SYNC_NONE,
};
if (nr_pages) {
args.nr_pages = nr_pages;
} else {
args.nr_pages = global_page_state(NR_FILE_DIRTY) +
global_page_state(NR_UNSTABLE_NFS); global_page_state(NR_UNSTABLE_NFS);
bdi_writeback_all(NULL, nr_pages); }
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();
} }
static noinline void block_dump___mark_inode_dirty(struct inode *inode) static noinline void block_dump___mark_inode_dirty(struct inode *inode)