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| author | Tal Zussman <tz2294@columbia.edu> | 2026-07-30 02:57:53 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-07-31 09:00:14 -0600 |
| commit | efbde6f9f449da3306f5b5d32f08829954ffb44d (patch) | |
| tree | 0407a587efa5961df37b8a0594c2d9b798d8cd45 /include | |
| parent | 77e73fa61b3888c9765a549af02c928372522cc9 (diff) | |
| download | linux-efbde6f9f449da3306f5b5d32f08829954ffb44d.tar.gz linux-efbde6f9f449da3306f5b5d32f08829954ffb44d.zip | |
iomap: use BIO_COMPLETE_IN_TASK for dropbehind writeback
Set BIO_COMPLETE_IN_TASK on iomap writeback bios when a dropbehind folio
is added. This ensures that bi_end_io runs in task context, where
folio_end_dropbehind() can safely invalidate folios.
With the bio layer now handling task-context deferral generically,
IOMAP_IOEND_DONTCACHE is no longer needed, as XFS no longer needs to
route DONTCACHE ioends through its completion workqueue. Remove the flag
and its NOMERGE entry.
Without the NOMERGE, regular I/Os that get merged with a dropbehind
folio will also have their completion deferred to task context.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Link: https://patch.msgid.link/20260730-blk-dontcache-v7-3-3e8e6850068d@columbia.edu
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iomap.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 56b43d594e6e..68af4935a107 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -404,16 +404,13 @@ sector_t iomap_bmap(struct address_space *mapping, sector_t bno, #define IOMAP_IOEND_BOUNDARY (1U << 2) /* is direct I/O */ #define IOMAP_IOEND_DIRECT (1U << 3) -/* is DONTCACHE I/O */ -#define IOMAP_IOEND_DONTCACHE (1U << 4) /* * Flags that if set on either ioend prevent the merge of two ioends. * (IOMAP_IOEND_BOUNDARY also prevents merges, but only one-way) */ #define IOMAP_IOEND_NOMERGE_FLAGS \ - (IOMAP_IOEND_SHARED | IOMAP_IOEND_UNWRITTEN | IOMAP_IOEND_DIRECT | \ - IOMAP_IOEND_DONTCACHE) + (IOMAP_IOEND_SHARED | IOMAP_IOEND_UNWRITTEN | IOMAP_IOEND_DIRECT) /* * Structure for writeback I/O completions. |