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iomap: trace iomap_zero_iter zeroing activities

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Trace which bytes actually get zeroed.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/175803480303.966383.2380024013746734540.stgit@frogsfrogsfrogs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Darrick J. Wong 2025-09-16 08:00:29 -07:00 committed by Christian Brauner
parent 8f5ae30d69
commit 231af8c14f
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GPG Key ID: 91C61BC06578DCA2
2 changed files with 4 additions and 0 deletions
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3
fs/iomap/buffered-io.c
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@ -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);

1
fs/iomap/trace.h
View File

@ -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" }, \