From 231af8c14f0f1574ce5d5e66b48f0087a6a764e3 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Tue, 16 Sep 2025 08:00:29 -0700 Subject: [PATCH] iomap: trace iomap_zero_iter zeroing activities Trace which bytes actually get zeroed. Signed-off-by: Darrick J. Wong Link: https://lore.kernel.org/175803480303.966383.2380024013746734540.stgit@frogsfrogsfrogs Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner --- fs/iomap/buffered-io.c | 3 +++ fs/iomap/trace.h | 1 + 2 files changed, 4 insertions(+) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index fd827398afd2f..ed7dd6426b0ee 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1396,6 +1396,9 @@ static int iomap_zero_iter(struct iomap_iter *iter, bool *did_zero, /* warn about zeroing folios beyond eof that won't write back */ WARN_ON_ONCE(folio_pos(folio) > iter->inode->i_size); + trace_iomap_zero_iter(iter->inode, folio_pos(folio) + offset, + bytes); + folio_zero_range(folio, offset, bytes); folio_mark_accessed(folio); diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h index 6ad66e6ba653e..a61c1dae47427 100644 --- a/fs/iomap/trace.h +++ b/fs/iomap/trace.h @@ -84,6 +84,7 @@ DEFINE_RANGE_EVENT(iomap_release_folio); DEFINE_RANGE_EVENT(iomap_invalidate_folio); DEFINE_RANGE_EVENT(iomap_dio_invalidate_fail); DEFINE_RANGE_EVENT(iomap_dio_rw_queued); +DEFINE_RANGE_EVENT(iomap_zero_iter); #define IOMAP_TYPE_STRINGS \ { IOMAP_HOLE, "HOLE" }, \ -- 2.47.3