Bug 217740

Summary:	netfront: cannot release all resources after adding and removing NICs time and again
Product:	Base System	Reporter:	Ouyang Zhaowei <ouyangzhaowei>
Component:	kern	Assignee:	freebsd-xen (Nobody) <xen>
Status:	New ---
Severity:	Affects Some People	Keywords:	patch
Priority:	---
Version:	10.3-RELEASE
Hardware:	amd64
OS:	Any

Description Ouyang Zhaowei 2017-03-13 11:38:27 UTC

On xen,freebsd 10.3 virtual machines hang after adding and removing NICs time 
and again(more than 30 times).
I found error log is as follows:
"netfront can't alloc tx grant refs"

Comment 1 Ouyang Zhaowei 2017-03-13 11:46:25 UTC

I have fixed this bug using the following patch:
https://lists.freebsd.org/pipermail/freebsd-xen/2016-November/002879.html