UDP LOR with the latest RELENG_7

Robert Watson rwatson at FreeBSD.org
Sun Oct 12 03:40:37 PDT 2008

On Fri, 10 Oct 2008, Robert Watson wrote:

> On Fri, 10 Oct 2008, Jeremy Chadwick wrote:
>>>   I'll see whether the system still locks up or not though..
>> Okay, I'm bringing rwatson@ into the thread since this is specific to UDP.
> I've now fixed the bug leading to the lock order reversal; I'd be interested 
> in knowing if it also corrects the stability issue.  This was r183753 in 
> svn; I'm not sure it's hit CVS/cvsup yet but should do in a few minutes.

Dear Vlad:

Could you confirm that with udp_usrreq.c: (or newer), the problem has 
gone away?  CVS log excerpt below.


Robert N M Watson
Computer Laboratory
University of Cambridge

date: 2008/10/10 21:18:12;  author: rwatson;  state: Exp;  lines: +8 -8
SVN rev 183753 on 2008-10-10 21:18:12Z by rwatson

Test the soreceive_dgram tunable and set up the pr_usrreqs structure
during UDP initialization, not during UDP inpcb initialization.

Reported by:    Vlad GALU <dudu at dudu dot ro>
Approved by:    re (kib)

More information about the freebsd-stable mailing list