Unverified Commit 231af8c1 authored by Darrick J. Wong's avatar Darrick J. Wong Committed by Christian Brauner
Browse files

iomap: trace iomap_zero_iter zeroing activities 



Trace which bytes actually get zeroed.

Signed-off-by: default avatarDarrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/175803480303.966383.2380024013746734540.stgit@frogsfrogsfrogs


Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 8f5ae30d

fs/iomap/buffered-io.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

fs/iomap/trace.h

+1 −0
Original line number Diff line number Diff line
@@ -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" }, \