[lwip-devel] [bug #36380] unsent_oversize mismatch in 1.4.1RC1

[Simon Goldschmidt]

Follow-up Comment #17, bug #36380 (project lwip):

> with the worse setting "TCP_OVERSIZE=1" i see the same assert also in
1.4.0.

In that case, I guess this bug is a duplicate to bug #32417 (TCP_OVERSIZE
seems to have problems with (fast-)retransmission), which I'm going to reopen
when I confirmed this bug, as it means that the fix for that bug was either
not enough or invalid.

In any case, you don't risk anything by disabling TCP_OVERSIZE (define it to
0). The TCP_OVERSIZE feature is mainly a performance imrpovement to ensure TCP
segments are allocated in a single pbuf. Without this, every call to
tcp_write() creates a new pbuf and segments are made up of multiple pbufs
unless one call to tcp_write() contains enough data for a single segment. If
you had no problems with it being like that in 1.3.2, you can safely turn this
new feature off.

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