Commit e6549c2a authored Mar 13, 2020 by Josef Bacik Committed by David Sterba May 25, 2020

btrfs: allow to use up to 90% of the global block rsv for unlink



We previously had a limit of stealing 50% of the global reserve for
unlink.  This was from a time when the global reserve was used for the
delayed refs as well.  However now those reservations are kept separate,
so the global reserve can be depleted much more to allow us to make
progress for space restoring operations like unlink.  Change the minimum
amount of space required to be left in the global reserve to 10%.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

parent 7f9fe614

fs/btrfs/space-info.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -867,7 +867,7 @@ static bool steal_from_global_rsv(struct btrfs_fs_info *fs_info,
		return false;

		spin_lock(&global_rsv->lock);
		min_bytes = div_factor(global_rsv->size, 5);
		min_bytes = div_factor(global_rsv->size, 1);
		if (global_rsv->reserved < min_bytes + ticket->bytes) {
		spin_unlock(&global_rsv->lock);
		return false;

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