Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 95995dbb authored by David Sterba's avatar David Sterba
Browse files

btrfs: remove unused logic of limiting async delalloc pages 

A proposed patch in https://marc.info/?l=linux-btrfs&m=147859791003837


pointed out bad limit threshold in cow_file_range_async, but it turned
out that the whole logic is not necessary and is done by writeback. We
agreed to remove it.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 26d30f85

fs/btrfs/inode.c

+0 −7
Original line number Diff line number Diff line
@@ -1167,7 +1167,6 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page, 
	struct btrfs_root *root = BTRFS_I(inode)->root;

	unsigned long nr_pages;

	u64 cur_end;

	int limit = 10 * SZ_1M;



	clear_extent_bit(&BTRFS_I(inode)->io_tree, start, end, EXTENT_LOCKED,

			 1, 0, NULL, GFP_NOFS);
@@ -1199,12 +1198,6 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page, 


		btrfs_queue_work(fs_info->delalloc_workers, &async_cow->work);



		if (atomic_read(&fs_info->async_delalloc_pages) > limit) {

			wait_event(fs_info->async_submit_wait,

				   (atomic_read(&fs_info->async_delalloc_pages) <

				    limit));

		}



		while (atomic_read(&fs_info->async_submit_draining) &&

		       atomic_read(&fs_info->async_delalloc_pages)) {

			wait_event(fs_info->async_submit_wait,