From: no-reply@sashiko.virtuozzo.com
To: Konstantin Khorenko <khorenko@virtuozzo.com>,
Liu Kui <kui.liu@virtuozzo.com>
Cc: devel@openvz.org, azaitsev@virtuozzo.com
Subject: Re: [Devel] [PATCH hci-8.1 3/3] fs/fuse kio: refactor receive path in pcs_sockio_recv()
Date: Wed, 30 Sep 2026 07:42:48 +0000 [thread overview]
Message-ID: <010701a0f1441e34-8d93deec-b605-4b34-aff9-4cb20014b94c-000000@eu-central-1.amazonses.com> (raw)
In-Reply-To: <20260930-sockio-refactor-8-1-v1-3-806348b9eb26@virtuozzo.com>
> The receive path consumes data one 4k page per kernel_recvmsg() call:
> do_recv_one_seg() extracts a single page from the iov_iter, kmaps it
> and receives into it, so a 1M message body costs up to 256 recvmsg
> calls plus a page reference and kmap/kunmap per page.
>
> Replace do_recv_one_seg() with do_sockio_recvmsg(), the receive twin
> of do_sockio_sendmsg(): hand the whole remaining iov_iter to
> sock_recvmsg() and let it drain everything available in one call.
> The header read goes through the same helper too, replacing
> do_sock_recv(), so the whole receive path now uses one recv primitive.
>
> https://virtuozzo.atlassian.net/browse/VSTOR-142167
>
> Signed-off-by: Liu Kui <kui.liu@virtuozzo.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20260930-sockio-refactor-8-1-v1-0-806348b9eb26@virtuozzo.com?part=3
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next prev parent reply other threads:[~2026-09-30 7:44 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 7:34 [Devel] [PATCH hci-8.1 0/3] fs/fuse kio: cut per-4k-page sendmsg/recvmsg calls in the sockio path Liu Kui
2026-09-30 7:34 ` [Devel] [PATCH hci-8.1 1/3] fs/fuse kio: teach pcs_umem about hugepage-backed mappings Liu Kui
2026-09-30 7:41 ` no-reply
2026-09-30 7:34 ` [Devel] [PATCH hci-8.1 2/3] fs/fuse kio: refactor transmit path in pcs_sockio_send() Liu Kui
2026-09-30 7:42 ` no-reply
2026-09-30 16:29 ` Konstantin Khorenko
2026-09-30 7:34 ` [Devel] [PATCH hci-8.1 3/3] fs/fuse kio: refactor receive path in pcs_sockio_recv() Liu Kui
2026-09-30 7:42 ` no-reply [this message]
2026-09-30 16:09 ` [Devel] [PATCH hci-8.1 0/3] fs/fuse kio: cut per-4k-page sendmsg/recvmsg calls in the sockio path Konstantin Khorenko
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