Commit ae55b9ec authored by David Sterba's avatar David Sterba
Browse files

btrfs: make find_workspace warn if there are no workspaces 



Be verbose if there are no workspaces at all, ie. the module init time
preallocation failed.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 3b501d18

fs/btrfs/compression.c

+14 −0
Original line number Diff line number Diff line
@@ -834,7 +834,21 @@ static struct list_head *find_workspace(int type) 
		 * workspace preallocated for each type and the compression

		 * time is bounded so we get to a workspace eventually. This

		 * makes our caller's life easier.

		 *

		 * To prevent silent and low-probability deadlocks (when the

		 * initial preallocation fails), check if there are any

		 * workspaces at all.

		 */

		if (atomic_read(total_ws) == 0) {

			static DEFINE_RATELIMIT_STATE(_rs,

					/* once per minute */ 60 * HZ,

					/* no burst */ 1);



			if (__ratelimit(&_rs)) {

				printk(KERN_WARNING

			    "no compression workspaces, low memory, retrying");

			}

		}

		goto again;

	}

	return workspace;