From: Darrick J. Wong Date: Sat, 1 Oct 2022 00:02:32 +0000 (-0700) Subject: iomap: add a tracepoint for mappings returned by map_blocks X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=adc9c2e5a723052de4f5bd7e3d6add050ba400e1;p=linux.git iomap: add a tracepoint for mappings returned by map_blocks Add a new tracepoint so we can see what mapping the filesystem returns to writeback a dirty page. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 77d59c159248d..91ee0b308e13d 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 d48868fc40d78..f6ea9540d082d 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,