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* [PATCH v2 net-next 0/2] tcp: mmap: rework zerocopy receive
@ 2018-04-25 21:43 Eric Dumazet
  2018-04-25 21:43 ` [PATCH v2 net-next 1/2] tcp: add TCP_ZEROCOPY_RECEIVE support for " Eric Dumazet
                   ` (2 more replies)
  0 siblings, 3 replies; 11+ messages in thread
From: Eric Dumazet @ 2018-04-25 21:43 UTC (permalink / raw)
  To: David S . Miller
  Cc: netdev, Andy Lutomirski, linux-kernel, linux-mm, Eric Dumazet,
	Eric Dumazet

syzbot reported a lockdep issue caused by tcp mmap() support.

I implemented Andy Lutomirski nice suggestions to resolve the
issue and increase scalability as well.

First patch is adding a new setsockopt() operation and changes mmap()
behavior.

Second patch changes tcp_mmap reference program.

v2:
 Added a missing page align of zc->length in tcp_zerocopy_receive()
 Properly clear zc->recv_skip_hint in case user request was completed.

Eric Dumazet (2):
  tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive
  selftests: net: tcp_mmap must use TCP_ZEROCOPY_RECEIVE

 include/uapi/linux/tcp.h               |   8 ++
 net/ipv4/tcp.c                         | 189 +++++++++++++------------
 tools/testing/selftests/net/tcp_mmap.c |  63 +++++----
 3 files changed, 142 insertions(+), 118 deletions(-)

-- 
2.17.0.441.gb46fe60e1d-goog

^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2018-04-27 13:03 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-25 21:43 [PATCH v2 net-next 0/2] tcp: mmap: rework zerocopy receive Eric Dumazet
2018-04-25 21:43 ` [PATCH v2 net-next 1/2] tcp: add TCP_ZEROCOPY_RECEIVE support for " Eric Dumazet
2018-04-26 13:40   ` Ka-Cheong Poon
2018-04-26 13:47     ` Eric Dumazet
2018-04-27  8:44   ` kbuild test robot
2018-04-27 13:03     ` Eric Dumazet
2018-04-25 21:43 ` [PATCH v2 net-next 2/2] selftests: net: tcp_mmap must use TCP_ZEROCOPY_RECEIVE Eric Dumazet
2018-04-26  1:20 ` [PATCH v2 net-next 0/2] tcp: mmap: rework zerocopy receive Soheil Hassas Yeganeh
2018-04-26 14:56   ` Eric Dumazet
2018-04-26 21:16     ` Andy Lutomirski
2018-04-26 21:40       ` Eric Dumazet

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