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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

WARNING: multiple messages have this Message-ID
From: Ilya Dryomov <idryomov@gmail.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Mike Snitzer <snitzer@redhat.com>,
	Geoff Levand <geoff@infradead.org>,
	linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org,
	Dongsheng Yang <dongsheng.yang@easystack.cn>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-block <linux-block@vger.kernel.org>,
	dm-devel@redhat.com,
	Ceph Development <ceph-devel@vger.kernel.org>,
	Ira Weiny <ira.weiny@intel.com>
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

WARNING: multiple messages have this Message-ID
From: Ilya Dryomov <idryomov@gmail.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Mike Snitzer <snitzer@redhat.com>,
	Geoff Levand <geoff@infradead.org>,
	linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org,
	Dongsheng Yang <dongsheng.yang@easystack.cn>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-block <linux-block@vger.kernel.org>,
	dm-devel@redhat.com,
	Ceph Development <ceph-devel@vger.kernel.org>,
	Ira Weiny <ira.weiny@intel.com>
Subject: Re: [dm-devel] [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

--
dm-devel mailing list
dm-devel@redhat.com
https://listman.redhat.com/mailman/listinfo/dm-devel


  reply	other threads:[~2021-06-09  9:37 UTC|newest]

Thread overview: 110+ 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 ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05 ` Christoph Hellwig
2021-06-08 16:05 ` [PATCH 01/16] mm: use kmap_local_page in memzero_page Christoph Hellwig
2021-06-08 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 18:17   ` Chaitanya Kulkarni
2021-06-08 18:17     ` [dm-devel] " Chaitanya Kulkarni
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 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 16:23   ` Bart Van Assche
2021-06-08 16:23     ` [dm-devel] " Bart Van Assche
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 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 16:23   ` Bart Van Assche
2021-06-08 16:23     ` [dm-devel] " Bart Van Assche
2021-06-08 16:23     ` Bart Van Assche
2021-06-08 18:18   ` Chaitanya Kulkarni
2021-06-08 18:18     ` [dm-devel] " Chaitanya Kulkarni
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 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 18:18   ` Chaitanya Kulkarni
2021-06-08 18:18     ` [dm-devel] " Chaitanya Kulkarni
2021-06-08 18:18     ` Chaitanya Kulkarni
2021-06-09  9:33   ` Ilya Dryomov
2021-06-09  9:33     ` [dm-devel] " Ilya Dryomov
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 16:05   ` [dm-devel] [PATCH 05/16] bvec: add memcpy_{from, to}_bvec " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 18:21   ` [PATCH 05/16] bvec: add memcpy_{from,to}_bvec " Chaitanya Kulkarni
2021-06-08 18:21     ` [dm-devel] [PATCH 05/16] bvec: add memcpy_{from, to}_bvec " Chaitanya Kulkarni
2021-06-08 18:21     ` [PATCH 05/16] bvec: add memcpy_{from,to}_bvec " Chaitanya Kulkarni
2021-06-08 16:05 ` [PATCH 06/16] block: use memzero_page in zero_fill_bio Christoph Hellwig
2021-06-08 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 18:19   ` Chaitanya Kulkarni
2021-06-08 18:19     ` [dm-devel] " Chaitanya Kulkarni
2021-06-08 18:19     ` Chaitanya Kulkarni
2021-06-08 16:05 ` [PATCH 07/16] rbd: use memzero_bvec Christoph Hellwig
2021-06-08 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-09  9:37   ` Ilya Dryomov [this message]
2021-06-09  9:37     ` [dm-devel] " Ilya Dryomov
2021-06-09  9:37     ` Ilya Dryomov
2021-06-08 16:05 ` [PATCH 08/16] dm-writecache: use bvec_kmap_local instead of bvec_kmap_irq Christoph Hellwig
2021-06-08 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 16:30   ` Bart Van Assche
2021-06-08 16:30     ` [dm-devel] " Bart Van Assche
2021-06-08 16:30     ` Bart Van Assche
2021-06-08 16:38     ` Christoph Hellwig
2021-06-08 16:38       ` [dm-devel] " Christoph Hellwig
2021-06-08 16:38       ` Christoph Hellwig
2021-06-08 16:05 ` [PATCH 09/16] ps3disk: use memcpy_{from,to}_bvec Christoph Hellwig
2021-06-08 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-09  1:48   ` Ira Weiny
2021-06-09  1:48     ` [dm-devel] " Ira Weiny
2021-06-09  1:48     ` Ira Weiny
2021-06-11  6:53     ` Christoph Hellwig
2021-06-11  6:53       ` [dm-devel] " Christoph Hellwig
2021-06-11  6:53       ` Christoph Hellwig
2021-06-12  4:07       ` Ira Weiny
2021-06-12  4:07         ` [dm-devel] " Ira Weiny
2021-06-12  4:07         ` Ira Weiny
2021-06-12  4:07         ` Ira Weiny
2021-06-15  5:02         ` Herbert Xu
2021-06-15  5:02           ` [dm-devel] " Herbert Xu
2021-06-15  5:02           ` Herbert Xu
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   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` 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   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` 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 16:05   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:05   ` Christoph Hellwig
2021-06-08 18:24   ` Chaitanya Kulkarni
2021-06-08 18:24     ` [dm-devel] " Chaitanya Kulkarni
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 16:06   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:06   ` Christoph Hellwig
2021-06-08 18:26   ` Chaitanya Kulkarni
2021-06-08 18:26     ` [dm-devel] " Chaitanya Kulkarni
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
2021-06-08 16:06   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:06   ` Christoph Hellwig
2021-06-09  1:58   ` Ira Weiny
2021-06-09  1:58     ` [dm-devel] " Ira Weiny
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   ` [dm-devel] [PATCH 15/16] block: use bvec_kmap_local in t10_pi_type1_{prepare, complete} Christoph Hellwig
2021-06-08 16:06   ` Christoph Hellwig
2021-06-08 16:06 ` [PATCH 16/16] block: use bvec_kmap_local in bio_integrity_process Christoph Hellwig
2021-06-08 16:06   ` [dm-devel] " Christoph Hellwig
2021-06-08 16:06   ` Christoph Hellwig
2021-06-09  1:59 ` switch the block layer to use kmap_local_page Ira Weiny
2021-06-09  1:59   ` [dm-devel] " Ira Weiny
2021-06-09  1:59   ` Ira Weiny

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