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From: Pavel Begunkov <[email protected]>
To: [email protected], [email protected],
	[email protected]
Cc: "David S . Miller" <[email protected]>,
	Jakub Kicinski <[email protected]>,
	Jonathan Lemon <[email protected]>,
	Willem de Bruijn <[email protected]>,
	Jens Axboe <[email protected]>, David Ahern <[email protected]>,
	[email protected], Pavel Begunkov <[email protected]>
Subject: [PATCH net-next v5 08/27] net: introduce __skb_fill_page_desc_noacc
Date: Tue, 12 Jul 2022 21:52:32 +0100	[thread overview]
Message-ID: <99bdf93fa51edfbef709ad41f9985d855998fe38.1657643355.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

Managed pages contain pinned userspace pages and controlled by upper
layers, there is no need in tracking skb->pfmemalloc for them. Introduce
a helper for filling frags but ignoring page tracking, it'll be needed
later.

Signed-off-by: Pavel Begunkov <[email protected]>
---
 include/linux/skbuff.h | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 07004593d7ca..1111adefd906 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2550,6 +2550,22 @@ static inline unsigned int skb_pagelen(const struct sk_buff *skb)
 	return skb_headlen(skb) + __skb_pagelen(skb);
 }
 
+static inline void __skb_fill_page_desc_noacc(struct skb_shared_info *shinfo,
+					      int i, struct page *page,
+					      int off, int size)
+{
+	skb_frag_t *frag = &shinfo->frags[i];
+
+	/*
+	 * Propagate page pfmemalloc to the skb if we can. The problem is
+	 * that not all callers have unique ownership of the page but rely
+	 * on page_is_pfmemalloc doing the right thing(tm).
+	 */
+	frag->bv_page		  = page;
+	frag->bv_offset		  = off;
+	skb_frag_size_set(frag, size);
+}
+
 /**
  * __skb_fill_page_desc - initialise a paged fragment in an skb
  * @skb: buffer containing fragment to be initialised
@@ -2566,17 +2582,7 @@ static inline unsigned int skb_pagelen(const struct sk_buff *skb)
 static inline void __skb_fill_page_desc(struct sk_buff *skb, int i,
 					struct page *page, int off, int size)
 {
-	skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-
-	/*
-	 * Propagate page pfmemalloc to the skb if we can. The problem is
-	 * that not all callers have unique ownership of the page but rely
-	 * on page_is_pfmemalloc doing the right thing(tm).
-	 */
-	frag->bv_page		  = page;
-	frag->bv_offset		  = off;
-	skb_frag_size_set(frag, size);
-
+	__skb_fill_page_desc_noacc(skb_shinfo(skb), i, page, off, size);
 	page = compound_head(page);
 	if (page_is_pfmemalloc(page))
 		skb->pfmemalloc	= true;
-- 
2.37.0


  parent reply	other threads:[~2022-07-12 20:53 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-12 20:52 [PATCH net-next v5 00/27] io_uring zerocopy send Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 01/27] ipv4: avoid partial copy for zc Pavel Begunkov
2022-07-19  1:54   ` Jakub Kicinski
2022-07-19  9:35     ` Willem de Bruijn
2022-07-21 10:03       ` Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 02/27] ipv6: " Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 03/27] skbuff: don't mix ubuf_info from different sources Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 04/27] skbuff: add SKBFL_DONT_ORPHAN flag Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 05/27] skbuff: carry external ubuf_info in msghdr Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 06/27] net: Allow custom iter handler " Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 07/27] net: introduce managed frags infrastructure Pavel Begunkov
2022-07-12 20:52 ` Pavel Begunkov [this message]
2022-07-12 20:52 ` [PATCH net-next v5 09/27] ipv4/udp: support externally provided ubufs Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 10/27] ipv6/udp: " Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 11/27] tcp: " Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 12/27] io_uring: initialise msghdr::msg_ubuf Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 13/27] io_uring: export io_put_task() Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 14/27] io_uring: add zc notification infrastructure Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 15/27] io_uring: cache struct io_notif Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 16/27] io_uring: complete notifiers in tw Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 17/27] io_uring: add rsrc referencing for notifiers Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 18/27] io_uring: add notification slot registration Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 19/27] io_uring: wire send zc request type Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 20/27] io_uring: account locked pages for non-fixed zc Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 21/27] io_uring: allow to pass addr into sendzc Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 22/27] io_uring: sendzc with fixed buffers Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 23/27] io_uring: flush notifiers after sendzc Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 24/27] io_uring: rename IORING_OP_FILES_UPDATE Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 25/27] io_uring: add zc notification flush requests Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 26/27] io_uring: enable managed frags with register buffers Pavel Begunkov
2022-07-12 20:52 ` [PATCH net-next v5 27/27] selftests/io_uring: test zerocopy send Pavel Begunkov
2022-07-27  8:01   ` dust.li
2022-07-27  9:18     ` Pavel Begunkov
2022-07-20 12:46 ` (subset) [PATCH net-next v5 00/27] io_uring " Jens Axboe

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