From: Ilya Dryomov <idryomov@gmail.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Geoff Levand <geoff@infradead.org>,
Dongsheng Yang <dongsheng.yang@easystack.cn>,
Mike Snitzer <snitzer@redhat.com>,
Ira Weiny <ira.weiny@intel.com>,
dm-devel@redhat.com, linux-mips@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
linux-block <linux-block@vger.kernel.org>,
linuxppc-dev@lists.ozlabs.org,
Ceph Development <ceph-devel@vger.kernel.org>
Subject: Re: [PATCH 07/16] rbd: use memzero_bvec
Date: Wed, 9 Jun 2021 11:37:45 +0200 [thread overview]
Message-ID: <CAOi1vP-zSAnx5z7EbPNVLoCHWdK5iGjXU7KKrRL8YZF1QfMf3A@mail.gmail.com> (raw)
In-Reply-To: <20210608160603.1535935-8-hch@lst.de>
On Tue, Jun 8, 2021 at 6:06 PM Christoph Hellwig <hch@lst.de> wrote:
>
> Use memzero_bvec instead of reimplementing it.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> drivers/block/rbd.c | 15 ++-------------
> 1 file changed, 2 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
> index bbb88eb009e0..eb243fc4d108 100644
> --- a/drivers/block/rbd.c
> +++ b/drivers/block/rbd.c
> @@ -1219,24 +1219,13 @@ static void rbd_dev_mapping_clear(struct rbd_device *rbd_dev)
> rbd_dev->mapping.size = 0;
> }
>
> -static void zero_bvec(struct bio_vec *bv)
> -{
> - void *buf;
> - unsigned long flags;
> -
> - buf = bvec_kmap_irq(bv, &flags);
> - memset(buf, 0, bv->bv_len);
> - flush_dcache_page(bv->bv_page);
> - bvec_kunmap_irq(buf, &flags);
> -}
> -
> static void zero_bios(struct ceph_bio_iter *bio_pos, u32 off, u32 bytes)
> {
> struct ceph_bio_iter it = *bio_pos;
>
> ceph_bio_iter_advance(&it, off);
> ceph_bio_iter_advance_step(&it, bytes, ({
> - zero_bvec(&bv);
> + memzero_bvec(&bv);
> }));
> }
>
> @@ -1246,7 +1235,7 @@ static void zero_bvecs(struct ceph_bvec_iter *bvec_pos, u32 off, u32 bytes)
>
> ceph_bvec_iter_advance(&it, off);
> ceph_bvec_iter_advance_step(&it, bytes, ({
> - zero_bvec(&bv);
> + memzero_bvec(&bv);
> }));
> }
>
Ira already brought up the fact that this conversion drops
flush_dcache_page() calls throughout. Other than that:
Acked-by: Ilya Dryomov <idryomov@gmail.com>
Thanks,
Ilya
next prev parent reply other threads:[~2021-06-09 9:37 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-08 16:05 switch the block layer to use kmap_local_page Christoph Hellwig
2021-06-08 16:05 ` [PATCH 01/16] mm: use kmap_local_page in memzero_page Christoph Hellwig
2021-06-08 18:17 ` Chaitanya Kulkarni
2021-06-08 16:05 ` [PATCH 02/16] MIPS: don't include <linux/genhd.h> in <asm/mach-rc32434/rb.h> Christoph Hellwig
2021-06-08 16:23 ` Bart Van Assche
2021-06-08 16:05 ` [PATCH 03/16] bvec: fix the include guards for bvec.h Christoph Hellwig
2021-06-08 16:23 ` Bart Van Assche
2021-06-08 18:18 ` Chaitanya Kulkarni
2021-06-08 16:05 ` [PATCH 04/16] bvec: add a bvec_kmap_local helper Christoph Hellwig
2021-06-08 18:18 ` Chaitanya Kulkarni
2021-06-09 9:33 ` Ilya Dryomov
2021-06-08 16:05 ` [PATCH 05/16] bvec: add memcpy_{from,to}_bvec and memzero_bvec helper Christoph Hellwig
2021-06-08 18:21 ` Chaitanya Kulkarni
2021-06-08 16:05 ` [PATCH 06/16] block: use memzero_page in zero_fill_bio Christoph Hellwig
2021-06-08 18:19 ` Chaitanya Kulkarni
2021-06-08 16:05 ` [PATCH 07/16] rbd: use memzero_bvec Christoph Hellwig
2021-06-09 9:37 ` Ilya Dryomov [this message]
2021-06-08 16:05 ` [PATCH 08/16] dm-writecache: use bvec_kmap_local instead of bvec_kmap_irq Christoph Hellwig
2021-06-08 16:30 ` Bart Van Assche
2021-06-08 16:38 ` Christoph Hellwig
2021-06-08 16:05 ` [PATCH 09/16] ps3disk: use memcpy_{from,to}_bvec Christoph Hellwig
2021-06-09 1:48 ` Ira Weiny
2021-06-11 6:53 ` Christoph Hellwig
2021-06-12 4:07 ` Ira Weiny
2021-06-15 5:02 ` Herbert Xu
2021-06-08 16:05 ` [PATCH 10/16] block: remove bvec_kmap_irq and bvec_kunmap_irq Christoph Hellwig
2021-06-08 16:05 ` [PATCH 11/16] block: rewrite bio_copy_data_iter to use bvec_kmap_local and memcpy_to_bvec Christoph Hellwig
2021-06-08 16:05 ` [PATCH 12/16] block: use memcpy_to_bvec in copy_to_high_bio_irq Christoph Hellwig
2021-06-08 18:24 ` Chaitanya Kulkarni
2021-06-08 16:06 ` [PATCH 13/16] block: use memcpy_from_bvec in bio_copy_kern_endio_read Christoph Hellwig
2021-06-08 18:26 ` Chaitanya Kulkarni
2021-06-08 16:06 ` [PATCH 14/16] block: use memcpy_from_bvec in __blk_queue_bounce Christoph Hellwig
2021-06-09 1:58 ` Ira Weiny
2021-06-08 16:06 ` [PATCH 15/16] block: use bvec_kmap_local in t10_pi_type1_{prepare,complete} Christoph Hellwig
2021-06-08 16:06 ` [PATCH 16/16] block: use bvec_kmap_local in bio_integrity_process Christoph Hellwig
2021-06-09 1:59 ` switch the block layer to use kmap_local_page Ira Weiny
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