Re: [lwip-users] mem_malloc bug

[Tom Hennen]

"that you can't use the last little bit of your memory..."

That's how I ran across it in fact.  I wasn't able to use the entire
TCP_SNDBUF as I was running out of memory before TCP_SNDBUF was full.


"Does it matter if a new one is made rather than updating the one in place?"

The existing one should be updated.  Otherwise 'mem2->next =
mem->next' will cause mem2 to point to itself and 'mem2->used = 0'
will cause this block (which *is* used) to appear unused, causing an
error when it is freed (if not sooner).

I'm not sure if I'll be able to submit a patch (i.e. if my employer
will let me).