Message ID | 20240202203926.2478590-6-bvanassche@acm.org (mailing list archive) |
---|---|
State | New |
Headers | show |
Series | Restore data lifetime support | expand |
diff --git a/fs/fcntl.c b/fs/fcntl.c index 00be0a710bba..8eb6d64a985b 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -317,6 +317,13 @@ static long fcntl_set_rw_hint(struct file *file, unsigned int cmd, WRITE_ONCE(inode->i_write_hint, hint); + /* + * file->f_mapping->host may differ from inode. As an example, + * blkdev_open() modifies file->f_mapping. + */ + if (file->f_mapping->host != inode) + WRITE_ONCE(file->f_mapping->host->i_write_hint, hint); + return 0; }
Write hints applied with F_SET_RW_HINT on a block device affect the block device inode only. Propagate these hints to the inode associated with struct block_device because that is the inode used when writing back dirty pages. Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Hellwig <hch@lst.de> Cc: Jeff Layton <jlayton@kernel.org> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Kanchan Joshi <joshi.k@samsung.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> --- fs/fcntl.c | 7 +++++++ 1 file changed, 7 insertions(+)