Commit 09fbc1c8 authored by Filipe Manana's avatar Filipe Manana Committed by David Sterba
Browse files

btrfs: allow fiemap to be interruptible 

Doing fiemap on a file with a very large number of extents can take a very
long time, and we have reports of it being too slow (two recent examples
in the Link tags below), so make it interruptible.

Link: https://lore.kernel.org/linux-btrfs/21dd32c6-f1f9-f44a-466a-e18fdc6788a7@virtuozzo.com/
Link: https://lore.kernel.org/linux-btrfs/Ysace25wh5BbLd5f@atmark-techno.com/


Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarQu Wenruo <wqu@suse.com>
Signed-off-by: default avatarFilipe Manana <fdmanana@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 33a86cfa

fs/btrfs/extent_io.c

+5 −0
Original line number Diff line number Diff line
@@ -5623,6 +5623,11 @@ int extent_fiemap(struct btrfs_inode *inode, struct fiemap_extent_info *fieinfo, 
				ret = 0;

			goto out_free;

		}



		if (fatal_signal_pending(current)) {

			ret = -EINTR;

			goto out_free;

		}

	}

out_free:

	if (!ret)