This bug often comes when multiple threads try to access pbuf related code .
You must use some mechanism to avoid multiple threads to access it at same time.
Regards
----- Original Message -----
From: Dinesh Chachan
To: [email protected]
Sent: Friday, March 23, 2007 11:19 AM
Subject: [lwip-users] Assertion "pbuf_free: p->ref > 0" failed
Hi.
I was trying to send a file from the server to the client using the lwip
stack. Whenever I send a file of smaller size it gets transferred without any
problems but whenever I try to transfer a file of 256MB or above I get an
assertion failure message as "Assertion "pbuf_free: p->ref > 0" failed at line
577 in ../../../../../lwip/src/core/pbuf.c".
I am using lwip 1.2 with Linux 2.4.20. What might be the possible reason
behind the error. I had made some changes in the lwipopts.h file by changing
the TCP_WND size etc to transfer bulk data. Is it due to the changes I have
made. But if i don't make the change data is transmitted very slowly. I require
a speend of something around 30Mbps. Can I attain this speed using lwip?
I am attaching the modified lwipopts.h file for your reference.
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