diff mbox series

[net-next,v2,02/10] udp6: shuffle up->pending AF_INET bits

Message ID 54bfbd199f8e371333082a123de432211248eaae.1643243772.git.asml.silence@gmail.com (mailing list archive)
State Accepted
Commit 406c4a0af010b8714d18e4c89de5575e1d3888f8
Delegated to: Netdev Maintainers
Headers show
Series udp/ipv6 optimisations | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 2 maintainers not CCed: dsahern@kernel.org yoshfuji@linux-ipv6.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 17 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Pavel Begunkov Jan. 27, 2022, 12:36 a.m. UTC 
Corked AF_INET for ipv6 socket doesn't appear to be the hottest case,
so move it out of the common path under up->pending check to remove
overhead.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 net/ipv6/udp.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 528b81ef19c9..e221a6957b1f 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1363,9 +1363,6 @@  int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 		}
 	}
 
-	if (up->pending == AF_INET)
-		return udp_sendmsg(sk, msg, len);
-
 	/* Rough check on arithmetic overflow,
 	   better check is made in ip6_append_data().
 	   */
@@ -1374,6 +1371,8 @@  int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 
 	getfrag  =  is_udplite ?  udplite_getfrag : ip_generic_getfrag;
 	if (up->pending) {
+		if (up->pending == AF_INET)
+			return udp_sendmsg(sk, msg, len);
 		/*
 		 * There are pending frames.
 		 * The socket lock must be held while it's corked.