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[kronosnet/kronosnet] 265857: [PMTUd] generate warning when there is a timeout r...
by GitHub 31 Dec '17

31 Dec '17

Branch: refs/heads/scale Home: https://github.com/kronosnet/kronosnet Commit: 265857837590d99a9b1bfa9e8d98df7cf0bef2a9 https://github.com/kronosnet/kronosnet/commit/265857837590d99a9b1bfa9e8d98d… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-31 (Sun, 31 Dec 2017) Changed paths: M libknet/threads_pmtud.c Log Message: ----------- [PMTUd] generate warning when there is a timeout receiving a response Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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[kronosnet/kronosnet]
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet

1 0

[kronosnet/kronosnet]
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/scale Home: https://github.com/kronosnet/kronosnet

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[kronosnet/kronosnet]
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/scale Home: https://github.com/kronosnet/kronosnet

1 0

[kronosnet/kronosnet] e2b4f9: [PMTUd] if PMTUd is rescheduled, then enforce a ne...
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet Commit: e2b4f916f553f4f025a08bb9edb5771d6c093ca2 https://github.com/kronosnet/kronosnet/commit/e2b4f916f553f4f025a08bb9edb57… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-30 (Sat, 30 Dec 2017) Changed paths: M libknet/threads_common.c Log Message: ----------- [PMTUd] if PMTUd is rescheduled, then enforce a new run the usleep between each PMTUd run will give time to the other threads to grab the wrlock Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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[kronosnet/kronosnet] 8cea55: [PMTUd] make PMTUd force_run notification more qui...
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet Commit: 8cea557b9bf7026ada7185a193df3de50c9b65af https://github.com/kronosnet/kronosnet/commit/8cea557b9bf7026ada7185a193df3… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-30 (Sat, 30 Dec 2017) Changed paths: M libknet/transport_udp.c Log Message: ----------- [PMTUd] make PMTUd force_run notification more quiet Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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[kronosnet/kronosnet] 18fe60: [PTMUd] if any threads receives a EMSGSIZE outside...
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet Commit: 18fe60ab186a708827e7488aabe963363e10f37e https://github.com/kronosnet/kronosnet/commit/18fe60ab186a708827e7488aabe96… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-30 (Sat, 30 Dec 2017) Changed paths: M libknet/internals.h M libknet/tests/knet_bench.c M libknet/threads_pmtud.c M libknet/transport_udp.c Log Message: ----------- [PTMUd] if any threads receives a EMSGSIZE outside of a PMTUD run, force PTMUd to run Scenario: node X has MTU Y on the interface and application is sending packets with size >= Y. The interface MTU is suddenly reduced to < Y Before this change, the kernel would be dropping packets till the next PMTUd run. After this change, the PMTUd will be informed that it has to rerun (overriding the pmtud_interval), reducing the packet drop to a minimum. How to test: force knet_bench to send 1500 size packets with ping_data (requires code change) and start it. reduce MTU on the interface from 1500 to 1300 (for example) Notice an immediate trigger of PMTUd run in debug mode Note: going up, from 1300 to 1500 will wait for the next PMTUd re-run as there is no immediate way to detect this change unless we start listening to kernel netlink sockets with libnl3 (investigation in progress but not critical enough atm). Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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[kronosnet/kronosnet] 937bda: [PMTUd] rename pmtud_running to pmtud_waiting
by GitHub 30 Dec '17

30 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet Commit: 937bda599da77192ab9df3da4758770a2250bd89 https://github.com/kronosnet/kronosnet/commit/937bda599da77192ab9df3da47587… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-30 (Sat, 30 Dec 2017) Changed paths: M libknet/internals.h M libknet/threads_common.c M libknet/threads_pmtud.c Log Message: ----------- [PMTUd] rename pmtud_running to pmtud_waiting Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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[kronosnet/kronosnet] 0fcec1: [PTMUd] by using a safe PMTU to init a link, we ca...
by GitHub 29 Dec '17

29 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet Commit: 0fcec1f7054e900a47e2f61954849691de8bc425 https://github.com/kronosnet/kronosnet/commit/0fcec1f7054e900a47e2f61954849… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-29 (Fri, 29 Dec 2017) Changed paths: M libknet/links.c Log Message: ----------- [PTMUd] by using a safe PMTU to init a link, we can shave down corosync membership creation by 25% tested on a 9 node cluster with 2 links each node, going down from 4 seconds to 3 seconds Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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[kronosnet/kronosnet] 6a6dfb: [PMTUd] Use kernel MTU information to determine ne...
by GitHub 29 Dec '17

29 Dec '17

Branch: refs/heads/new-pmtud Home: https://github.com/kronosnet/kronosnet Commit: 6a6dfb6db83ef53b88c7717c4318cfb8993deb15 https://github.com/kronosnet/kronosnet/commit/6a6dfb6db83ef53b88c7717c4318c… Author: Fabio M. Di Nitto <fdinitto(a)redhat.com> Date: 2017-12-29 (Fri, 29 Dec 2017) Changed paths: M libknet/handle.c M libknet/internals.h M libknet/threads_pmtud.c M libknet/transport_udp.c Log Message: ----------- [PMTUd] Use kernel MTU information to determine next packet size during discovery Using this information we can, for good links (*), determine and verify the link MTU with 2 packets. * good links means: node X has MTU Y configured on a given interface. Any network object between node X and destination is capable of handling MTU >= Y. In no case the kernel will allow us to send packets > Y. Signed-off-by: Fabio M. Di Nitto <fdinitto(a)redhat.com>

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