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[lwip-devel] [bug #51663] tcp_out rto: delay re-transmission earlier if
[lwip-devel] [bug #51663] tcp_out rto: delay re-transmission earlier if link writes are deferred.
Sat, 5 Aug 2017 05:37:35 -0400 (EDT)
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Summary: tcp_out rto: delay re-transmission earlier if link
writes are deferred.
Project: lwIP - A Lightweight TCP/IP stack
Submitted by: ourairquality
Submitted on: Sat 05 Aug 2017 09:37:33 AM UTC
Severity: 3 - Normal
Item Group: Change Request
Assigned to: None
Discussion Lock: Any
Planned Release: None
lwIP version: git head
There is already a guard in tcp_output_segment() for a pbuf still being
referenced by the netif driver due to deferred transmission, however the
callers are modifying state even when this gives up.
It seems cleaner to have the callers guard this case and avoid modifying their
tcp_rexmit_rto() might better avoid re-transmission of any segments if any of
the unacked segments are deferred, to avoid loading the link further if it is
struggling to flush its buffered writes. Link level queues can be limited on
some devices and need spares for link management.
Date: Sat 05 Aug 2017 09:37:33 AM UTC Name:
0001-tcp_out-rto-delay-re-transmission-earlier-if-link-wr.patch Size: 3KiB
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- [lwip-devel] [bug #51663] tcp_out rto: delay re-transmission earlier if link writes are deferred.,