From: Josef Bacik Date: Thu, 22 Aug 2019 19:10:56 +0000 (-0400) Subject: btrfs: add space reservation tracepoint for reserved bytes X-Git-Tag: v5.4-rc1~123^2~15 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a43c383574d80503f3ba9cd08de16dad2590ca1b;p=linux.git btrfs: add space reservation tracepoint for reserved bytes I noticed when folding the trace_btrfs_space_reservation() tracepoint into the btrfs_space_info_update_* helpers that we didn't emit a tracepoint when doing btrfs_add_reserved_bytes(). I know this is because we were swapping bytes_may_use for bytes_reserved, so in my mind there was no reason to have the tracepoint there. But now there is because we always emit the unreserve for the bytes_may_use side, and this would have broken if compression was on anyway. Add a tracepoint to cover the bytes_reserved counter so the math still comes out right. Signed-off-by: Josef Bacik Reviewed-by: David Sterba Signed-off-by: David Sterba --- diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index d61aa94884f0..bf7e3f23bba7 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -2758,6 +2758,8 @@ int btrfs_add_reserved_bytes(struct btrfs_block_group_cache *cache, } else { cache->reserved += num_bytes; space_info->bytes_reserved += num_bytes; + trace_btrfs_space_reservation(cache->fs_info, "space_info", + space_info->flags, num_bytes, 1); btrfs_space_info_update_bytes_may_use(cache->fs_info, space_info, -ram_bytes); if (delalloc)