From: Darrick J. Wong <djwong@xxxxxxxxxx> Add a new tracepoint so we can see what mapping the filesystem returns to writeback a dirty page. Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> --- fs/iomap/buffered-io.c | 1 + fs/iomap/trace.h | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 77d59c159248..91ee0b308e13 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1360,6 +1360,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, error = wpc->ops->map_blocks(wpc, inode, pos); if (error) break; + trace_iomap_writepage_map(inode, &wpc->iomap); if (WARN_ON_ONCE(wpc->iomap.type == IOMAP_INLINE)) continue; if (wpc->iomap.type == IOMAP_HOLE) diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h index d48868fc40d7..f6ea9540d082 100644 --- a/fs/iomap/trace.h +++ b/fs/iomap/trace.h @@ -148,6 +148,7 @@ DEFINE_EVENT(iomap_class, name, \ TP_ARGS(inode, iomap)) DEFINE_IOMAP_EVENT(iomap_iter_dstmap); DEFINE_IOMAP_EVENT(iomap_iter_srcmap); +DEFINE_IOMAP_EVENT(iomap_writepage_map); TRACE_EVENT(iomap_iter, TP_PROTO(struct iomap_iter *iter, const void *ops,
