The patch titled
Subject: fs: introduce IOMAP_NOWAIT
has been added to the -mm tree. Its filename is
fs-introduce-iomap_nowait.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-introduce-iomap_nowait.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-introduce-iomap_nowait.patch
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------------------------------------------------------
From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Subject: fs: introduce IOMAP_NOWAIT
IOCB_NOWAIT translates to IOMAP_NOWAIT for iomaps. This is used by XFS in
the XFS patch.
Link: http://lkml.kernel.org/r/20170615160002.17233-7-rgoldwyn@xxxxxxx
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx>
Cc: Chris Mason <clm@xxxxxx>
Cc: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Cc: David Sterba <dsterba@xxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Josef Bacik <jbacik@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/iomap.c | 2 ++
include/linux/iomap.h | 1 +
2 files changed, 3 insertions(+)
diff -puN fs/iomap.c~fs-introduce-iomap_nowait fs/iomap.c
--- a/fs/iomap.c~fs-introduce-iomap_nowait
+++ a/fs/iomap.c
@@ -879,6 +879,8 @@ iomap_dio_rw(struct kiocb *iocb, struct
} else {
dio->flags |= IOMAP_DIO_WRITE;
flags |= IOMAP_WRITE;
+ if (iocb->ki_flags & IOCB_NOWAIT)
+ flags |= IOMAP_NOWAIT;
}
ret = filemap_write_and_wait_range(mapping, start, end);
diff -puN include/linux/iomap.h~fs-introduce-iomap_nowait include/linux/iomap.h
--- a/include/linux/iomap.h~fs-introduce-iomap_nowait
+++ a/include/linux/iomap.h
@@ -52,6 +52,7 @@ struct iomap {
#define IOMAP_REPORT (1 << 2) /* report extent status, e.g. FIEMAP */
#define IOMAP_FAULT (1 << 3) /* mapping for page fault */
#define IOMAP_DIRECT (1 << 4) /* direct I/O */
+#define IOMAP_NOWAIT (1 << 5) /* Don't wait for writeback */
struct iomap_ops {
/*
_
Patches currently in -mm which might be from rgoldwyn@xxxxxxxx are
fs-separate-out-kiocb-flags-setup-based-on-rwf_-flags.patch
fs-introduce-filemap_range_has_page.patch
fs-use-rwf_-flags-for-aio-operations.patch
fs-introduce-rwf_nowait-and-fmode_aio_nowait.patch
fs-return-if-direct-write-will-trigger-writeback.patch
fs-introduce-iomap_nowait.patch
block-return-on-congested-block-device.patch
ext4-nowait-aio-support.patch
xfs-nowait-aio-support.patch
btrfs-nowait-aio-support.patch
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