net-test: packetdrill: update tcp/epoll tests to latest kernel behavior #76
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The EPOLLOUT tests expect a buggy kernel behavior where EPOLLOUT is not sent in some circumstances, when only a small fragment is acknowledged. Kernel commit 4bfe744ff164 "tcp: fix potential xmit stalls caused by TCP_NOTSENT_LOWAT" changes the kernel behavior in that regard and fixes the bug. Adapt the EPOLLOUT tests to match the new/correct kernel behavior. The epoll_out_edge.pkt and epoll_out_edge_default_notsent_lowat.pkt tests require an additional change because the last write is a full write now. Instead of changing the write size to make it a partial write again, keep the write size unchanged and adjust the expected result of epoll_wait(), since partial writes are already tested earlier in the test flow. Signed-off-by: Radu Rendec <rrendec@redhat.com> Change-Id: I7327d88fd1280f115ebf4f2a3c83ae4ff590d117
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The EPOLLOUT tests expect a buggy kernel behavior where EPOLLOUT is not sent in some circumstances, when only a small fragment is acknowledged. Kernel commit 4bfe744ff164 "tcp: fix potential xmit stalls caused by TCP_NOTSENT_LOWAT" changes the kernel behavior in that regard and fixes the bug.
Adapt the EPOLLOUT tests to match the new/correct kernel behavior.
The epoll_out_edge.pkt and epoll_out_edge_default_notsent_lowat.pkt tests require an additional change because the last write is a full write now. Instead of changing the write size to make it a partial write again, keep the write size unchanged and adjust the expected result of epoll_wait(), since partial writes are already tested earlier in the test flow.