From 22df20cae1f43eb4d7b754cf8270a2985133ed98 Mon Sep 17 00:00:00 2001 From: Michael Jeanson Date: Thu, 7 Jun 2018 15:48:30 -0400 Subject: [PATCH] Add btrfs tracepoint for em's EEXIST case See upstream commits: commit 393da91819e35af538ef97c7c6a04899e2fbfe0e Author: Liu Bo Date: Fri Jan 5 12:51:16 2018 -0700 Btrfs: add tracepoint for em's EEXIST case This is adding a tracepoint 'btrfs_handle_em_exist' to help debug the subtle bugs around merge_extent_mapping. Signed-off-by: Michael Jeanson Signed-off-by: Mathieu Desnoyers --- instrumentation/events/lttng-module/btrfs.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/instrumentation/events/lttng-module/btrfs.h b/instrumentation/events/lttng-module/btrfs.h index 4eb0db2f..c413e921 100644 --- a/instrumentation/events/lttng-module/btrfs.h +++ b/instrumentation/events/lttng-module/btrfs.h @@ -273,6 +273,24 @@ LTTNG_TRACEPOINT_EVENT(btrfs_get_extent, #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,17,0)) +LTTNG_TRACEPOINT_EVENT(btrfs_handle_em_exist, + + TP_PROTO(const struct extent_map *existing, const struct extent_map *map, u64 start, u64 len), + + TP_ARGS(existing, map, start, len), + + TP_FIELDS( + ctf_integer(u64, e_start, existing->start) + ctf_integer(u64, e_len, existing->len) + ctf_integer(u64, map_start, map->start) + ctf_integer(u64, map_len, map->len) + ctf_integer(u64, start, start) + ctf_integer(u64, len, len) + ) +) +#endif + #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) LTTNG_TRACEPOINT_EVENT_CLASS(btrfs__ordered_extent, -- 2.34.1