Commit dc0ab488 authored by Nikolay Borisov's avatar Nikolay Borisov Committed by David Sterba
Browse files

btrfs: factor out reada loop in __reada_start_machine 



This is in preparation for moving fs_devices to proper lists.

Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 1028d1c4

fs/btrfs/reada.c

+15 −5
Original line number Diff line number Diff line
@@ -767,15 +767,13 @@ static void reada_start_machine_worker(struct btrfs_work *work) 
	kfree(rmw);

}



static void __reada_start_machine(struct btrfs_fs_info *fs_info)

/* Try to start up to 10k READA requests for a group of devices */

static int reada_start_for_fsdevs(struct btrfs_fs_devices *fs_devices)

{

	struct btrfs_device *device;

	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;

	u64 enqueued;

	u64 total = 0;

	int i;

	struct btrfs_device *device;



again:

	do {

		enqueued = 0;

		mutex_lock(&fs_devices->device_list_mutex);
@@ -787,6 +785,18 @@ static void __reada_start_machine(struct btrfs_fs_info *fs_info) 
		mutex_unlock(&fs_devices->device_list_mutex);

		total += enqueued;

	} while (enqueued && total < 10000);



	return total;

}



static void __reada_start_machine(struct btrfs_fs_info *fs_info)

{

	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;

	int i;

	u64 enqueued = 0;



again:

	enqueued += reada_start_for_fsdevs(fs_devices);

	if (fs_devices->seed) {

		fs_devices = fs_devices->seed;

		goto again;