Messages in this thread | | | From | Eric Dumazet <> | Subject | [PATCH v3 net-next 0/2] tcp: mmap: rework zerocopy receive | Date | Thu, 26 Apr 2018 07:50:54 -0700 |
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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 getsockopt() operation and changes mmap() behavior.
Second patch changes tcp_mmap reference program.
v3: change TCP_ZEROCOPY_RECEIVE to be a getsockopt() option instead of setsockopt(), feedback from Ka-Cheon Poon
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 | 192 +++++++++++++------------ tools/testing/selftests/net/tcp_mmap.c | 64 +++++---- 3 files changed, 146 insertions(+), 118 deletions(-)
-- 2.17.0.484.g0c8726318c-goog
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