[lwip-devel] [patch #5453] pbuf patch for SYS_LIGHTWEIGHT_PROT=0

[Simon Goldschmidt]

Follow-up Comment #7, patch #5453 (project lwip):

Hm, but what was Christiaan thinking SYS_LIGHTWEIGHT_PROT=0 is doing? I can
only think of _one_ scenario where this can work: if you have _not a single_
context switch, meaning you have only lwip raw api (no OS, no threads) and
your packets aren't delivered in interrupt context but through polling the
ethernet device. In this special case, you needn't lock the pbuf pool, for
example, and you're faster then!

But then, we should agree that SYS_LIGHTWEIGHT_PROT=0 does mean 'no
protection' and not 'using semaphores as protection'. And we have to document
that!

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