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authorJosef Bacik <josef@toxicpanda.com>2020-10-09 16:28:29 +0300
committerDavid Sterba <dsterba@suse.com>2021-02-09 00:58:59 +0300
commite5ad49e215a07562f0a765c68161d13d7c23d8d1 (patch)
tree71716a73c20d84148fdad60307d8e568accd795e /include/trace
parent4b02b00fe5f1377f3dbfb168dfcfebf3d7a9632f (diff)
downloadlinux-e5ad49e215a07562f0a765c68161d13d7c23d8d1.tar.xz
btrfs: add a trace class for dumping the current ENOSPC state
Often when I'm debugging ENOSPC related issues I have to resort to printing the entire ENOSPC state with trace_printk() in different spots. This gets pretty annoying, so add a trace state that does this for us. Then add a trace point at the end of preemptive flushing so you can see the state of the space_info when we decide to exit preemptive flushing. This helped me figure out we weren't kicking in the preemptive flushing soon enough. Reviewed-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>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/btrfs.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 807921de6b32..0551ea65374f 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -2029,6 +2029,68 @@ TRACE_EVENT(btrfs_convert_extent_bit,
__print_flags(__entry->clear_bits, "|", EXTENT_FLAGS))
);
+DECLARE_EVENT_CLASS(btrfs_dump_space_info,
+ TP_PROTO(const struct btrfs_fs_info *fs_info,
+ const struct btrfs_space_info *sinfo),
+
+ TP_ARGS(fs_info, sinfo),
+
+ TP_STRUCT__entry_btrfs(
+ __field( u64, flags )
+ __field( u64, total_bytes )
+ __field( u64, bytes_used )
+ __field( u64, bytes_pinned )
+ __field( u64, bytes_reserved )
+ __field( u64, bytes_may_use )
+ __field( u64, bytes_readonly )
+ __field( u64, reclaim_size )
+ __field( int, clamp )
+ __field( u64, global_reserved )
+ __field( u64, trans_reserved )
+ __field( u64, delayed_refs_reserved )
+ __field( u64, delayed_reserved )
+ __field( u64, free_chunk_space )
+ ),
+
+ TP_fast_assign_btrfs(fs_info,
+ __entry->flags = sinfo->flags;
+ __entry->total_bytes = sinfo->total_bytes;
+ __entry->bytes_used = sinfo->bytes_used;
+ __entry->bytes_pinned = sinfo->bytes_pinned;
+ __entry->bytes_reserved = sinfo->bytes_reserved;
+ __entry->bytes_may_use = sinfo->bytes_may_use;
+ __entry->bytes_readonly = sinfo->bytes_readonly;
+ __entry->reclaim_size = sinfo->reclaim_size;
+ __entry->clamp = sinfo->clamp;
+ __entry->global_reserved = fs_info->global_block_rsv.reserved;
+ __entry->trans_reserved = fs_info->trans_block_rsv.reserved;
+ __entry->delayed_refs_reserved = fs_info->delayed_refs_rsv.reserved;
+ __entry->delayed_reserved = fs_info->delayed_block_rsv.reserved;
+ __entry->free_chunk_space = atomic64_read(&fs_info->free_chunk_space);
+ ),
+
+ TP_printk_btrfs("flags=%s total_bytes=%llu bytes_used=%llu "
+ "bytes_pinned=%llu bytes_reserved=%llu "
+ "bytes_may_use=%llu bytes_readonly=%llu "
+ "reclaim_size=%llu clamp=%d global_reserved=%llu "
+ "trans_reserved=%llu delayed_refs_reserved=%llu "
+ "delayed_reserved=%llu chunk_free_space=%llu",
+ __print_flags(__entry->flags, "|", BTRFS_GROUP_FLAGS),
+ __entry->total_bytes, __entry->bytes_used,
+ __entry->bytes_pinned, __entry->bytes_reserved,
+ __entry->bytes_may_use, __entry->bytes_readonly,
+ __entry->reclaim_size, __entry->clamp,
+ __entry->global_reserved, __entry->trans_reserved,
+ __entry->delayed_refs_reserved,
+ __entry->delayed_reserved, __entry->free_chunk_space)
+);
+
+DEFINE_EVENT(btrfs_dump_space_info, btrfs_done_preemptive_reclaim,
+ TP_PROTO(const struct btrfs_fs_info *fs_info,
+ const struct btrfs_space_info *sinfo),
+ TP_ARGS(fs_info, sinfo)
+);
+
TRACE_EVENT(btrfs_reserve_ticket,
TP_PROTO(const struct btrfs_fs_info *fs_info, u64 flags, u64 bytes,
u64 start_ns, int flush, int error),