The patch titled
Subject: fs/block_dev.c: fix iov_shorten() criteria in blkdev_aio_read()
has been added to the -mm tree. Its filename is
fs-block_devc-fix-iov_shorten-criteria-in-blkdev_aio_read.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Gu Zheng <guz.fnst@xxxxxxxxxxxxxx>
Subject: fs/block_dev.c: fix iov_shorten() criteria in blkdev_aio_read()
blkdev_aio_read() test 'size' to see if it is equal or greater than the
target count we request(iocb->ki_left). If so there is no need to call
iov_shorten() to reduce number of segments and the iovec's length. So the
judgement should be changed to 'if (size < iocb->ki_left)' instead.
Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
Signed-off-by: Gu Zheng <guz.fnst@xxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/block_dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/block_dev.c~fs-block_devc-fix-iov_shorten-criteria-in-blkdev_aio_read fs/block_dev.c
--- a/fs/block_dev.c~fs-block_devc-fix-iov_shorten-criteria-in-blkdev_aio_read
+++ a/fs/block_dev.c
@@ -1559,7 +1559,7 @@ static ssize_t blkdev_aio_read(struct ki
return 0;
size -= pos;
- if (size < INT_MAX)
+ if (size < iocb->ki_left)
nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
return generic_file_aio_read(iocb, iov, nr_segs, pos);
}
_
Patches currently in -mm which might be from guz.fnst@xxxxxxxxxxxxxx are
fs-block_devc-fix-iov_shorten-criteria-in-blkdev_aio_read.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
