diff options
| author | Lawrence Brakmo <[email protected]> | 2016-09-27 19:03:37 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2016-09-28 07:52:34 -0400 |
| commit | 3acf3ec3f4b0fd4263989f2e4227bbd1c42b5fe1 (patch) | |
| tree | cdc67656dc5d6ea9bc76ed3e2cd80b3614065d8d /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | fa5effe7664b1606dfd639dff58686f6dbb119d7 (diff) | |
tcp: Change txhash on every SYN and RTO retransmit
The current code changes txhash (flowlables) on every retransmitted
SYN/ACK, but only after the 2nd retransmitted SYN and only after
tcp_retries1 RTO retransmits.
With this patch:
1) txhash is changed with every SYN retransmits
2) txhash is changed with every RTO.
The result is that we can start re-routing around failed (or very
congested paths) as soon as possible. Otherwise application health
checks may fail and the connection may be terminated before we start
to change txhash.
v4: Removed sysctl, txhash is changed for all RTOs
v3: Removed text saying default value of sysctl is 0 (it is 100)
v2: Added sysctl documentation and cleaned code
Tested with packetdrill tests
Signed-off-by: Lawrence Brakmo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions