netdev - Re: [PATCH 08/23] rbd: use bvec_set_page to initialize the copy up bvec

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Message-ID: <CAOi1vP9AAQP7yqrXNRjvahy_t_Oz4+Z-CpT=uHscngC2OMWf5g@mail.gmail.com>
Date:   Mon, 30 Jan 2023 18:47:44 +0100
From:   Ilya Dryomov <idryomov@...il.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Jens Axboe <axboe@...nel.dk>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Keith Busch <kbusch@...nel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        David Howells <dhowells@...hat.com>,
        Marc Dionne <marc.dionne@...istor.com>,
        Xiubo Li <xiubli@...hat.com>, Steve French <sfrench@...ba.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Mike Marshall <hubcap@...ibond.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-block@...r.kernel.org, ceph-devel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-nvme@...ts.infradead.org, linux-scsi@...r.kernel.org,
        target-devel@...r.kernel.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org, linux-afs@...ts.infradead.org,
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        linux-mm@...ck.org
Subject: Re: [PATCH 08/23] rbd: use bvec_set_page to initialize the copy up bvec

On Mon, Jan 30, 2023 at 10:22 AM Christoph Hellwig <hch@....de> wrote:
>
> Use the bvec_set_page helper to initialize the copy up bvec.
>
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  drivers/block/rbd.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
> index 04453f4a319cb4..1faca7e07a4d52 100644
> --- a/drivers/block/rbd.c
> +++ b/drivers/block/rbd.c
> @@ -3068,13 +3068,12 @@ static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap)
>
>         for (i = 0; i < obj_req->copyup_bvec_count; i++) {
>                 unsigned int len = min(obj_overlap, (u64)PAGE_SIZE);
> +               struct page *page = alloc_page(GFP_NOIO);
>
> -               obj_req->copyup_bvecs[i].bv_page = alloc_page(GFP_NOIO);
> -               if (!obj_req->copyup_bvecs[i].bv_page)
> +               if (!page)
>                         return -ENOMEM;
>
> -               obj_req->copyup_bvecs[i].bv_offset = 0;
> -               obj_req->copyup_bvecs[i].bv_len = len;
> +               bvec_set_page(&obj_req->copyup_bvecs[i], page, len, 0);
>                 obj_overlap -= len;
>         }
>
> --
> 2.39.0
>

Reviewed-by: Ilya Dryomov <idryomov@...il.com>

Thanks,

                Ilya