From b7bc85480b03765a7993262f2c333628c36fbc45 Mon Sep 17 00:00:00 2001 From: Hans Holmberg Date: Mon, 10 Mar 2025 13:39:59 +0000 Subject: [PATCH] xfs: trigger zone GC when out of available rt blocks We periodically check the available rt blocks when filling up zones and start GC if needed, but we may run completely out in between filling zones, so start GC(unless already running) if we can't reserve writable space. This should only happen as a corner case in setups with very few backing zones. Fixes: 080d01c41d44 ("xfs: implement zoned garbage collection") Signed-off-by: Hans Holmberg Reviewed-by: Christoph Hellwig Signed-off-by: Carlos Maiolino --- fs/xfs/xfs_zone_space_resv.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/xfs/xfs_zone_space_resv.c b/fs/xfs/xfs_zone_space_resv.c index 4bf1b18aa7a7..93c9a7721139 100644 --- a/fs/xfs/xfs_zone_space_resv.c +++ b/fs/xfs/xfs_zone_space_resv.c @@ -159,6 +159,16 @@ xfs_zoned_reserve_available( if (error != -ENOSPC) break; + /* + * Make sure to start GC if it is not running already. As we + * check the rtavailable count when filling up zones, GC is + * normally already running at this point, but in some setups + * with very few zones we may completely run out of non- + * reserved blocks in between filling zones. + */ + if (!xfs_is_zonegc_running(mp)) + wake_up_process(zi->zi_gc_thread); + /* * If there is no reclaimable group left and we aren't still * processing a pending GC request give up as we're fully out -- 2.47.3