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Commit 4575c9cc authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: Scale the bdi ra_pages by the number of devices in the FS 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 9ad6b7bc

fs/btrfs/disk-io.c

+3 −1
Original line number Diff line number Diff line
@@ -932,7 +932,7 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) 
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)

	bdi_init(bdi);

#endif

	bdi->ra_pages	= default_backing_dev_info.ra_pages * 4;

	bdi->ra_pages	= default_backing_dev_info.ra_pages;

	bdi->state		= 0;

	bdi->capabilities	= default_backing_dev_info.capabilities;

	bdi->unplug_io_fn	= btrfs_unplug_io_fn;
@@ -1214,6 +1214,8 @@ struct btrfs_root *open_ctree(struct super_block *sb, 
		       (unsigned long long)fs_devices->num_devices);

		goto fail_sb_buffer;

	}

	fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super);



	nodesize = btrfs_super_nodesize(disk_super);

	leafsize = btrfs_super_leafsize(disk_super);

	sectorsize = btrfs_super_sectorsize(disk_super);