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Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH v3 4/9] Introduce IOCB_SWAP kiocb flag to trigger REQ_SWAP From: David Howells To: willy@infradead.org, hch@lst.de, trond.myklebust@primarydata.com Cc: "Darrick J. Wong" , linux-xfs@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, dhowells@redhat.com, dhowells@redhat.com, darrick.wong@oracle.com, viro@zeniv.linux.org.uk, jlayton@kernel.org, torvalds@linux-foundation.org, linux-nfs@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Fri, 24 Sep 2021 18:18:32 +0100 Message-ID: <163250391274.2330363.16176856646027970865.stgit@warthog.procyon.org.uk> In-Reply-To: <163250387273.2330363.13240781819520072222.stgit@warthog.procyon.org.uk> References: <163250387273.2330363.13240781819520072222.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Introduce an IOCB_SWAP flag for the kiocb struct such that the REQ_SWAP will get set on lower level operation structures in generic code. Signed-off-by: David Howells cc: Matthew Wilcox cc: Christoph Hellwig cc: Darrick J. Wong cc: linux-xfs@vger.kernel.org cc: linux-block@vger.kernel.org cc: linux-fsdevel@vger.kernel.org cc: linux-mm@kvack.org --- fs/direct-io.c | 2 ++ include/linux/bio.h | 2 ++ include/linux/fs.h | 1 + 3 files changed, 5 insertions(+) diff --git a/fs/direct-io.c b/fs/direct-io.c index b2e86e739d7a..76eec0a68fa4 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -1216,6 +1216,8 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, } if (iocb->ki_flags & IOCB_HIPRI) dio->op_flags |= REQ_HIPRI; + if (iocb->ki_flags & IOCB_SWAP) + dio->op_flags |= REQ_SWAP; /* * For AIO O_(D)SYNC writes we need to defer completions to a workqueue diff --git a/include/linux/bio.h b/include/linux/bio.h index 00952e92eae1..b01133727494 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -787,6 +787,8 @@ static inline void bio_set_polled(struct bio *bio, struct kiocb *kiocb) bio->bi_opf |= REQ_HIPRI; if (!is_sync_kiocb(kiocb)) bio->bi_opf |= REQ_NOWAIT; + if (kiocb->ki_flags & IOCB_SWAP) + bio->bi_opf |= REQ_SWAP; } struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); diff --git a/include/linux/fs.h b/include/linux/fs.h index c909ca6c0eb6..c20f4423e2f1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -321,6 +321,7 @@ enum rw_hint { #define IOCB_NOIO (1 << 20) /* can use bio alloc cache */ #define IOCB_ALLOC_CACHE (1 << 21) +#define IOCB_SWAP (1 << 22) /* Operation on a swapfile */ struct kiocb { struct file *ki_filp;