Packet corruption in re0

Pyun YongHyeon pyunyh at gmail.com
Thu Feb 21 05:06:43 UTC 2008


On Thu, Feb 21, 2008 at 02:47:43PM +1000, Robert Backhaus wrote:
 > On Thu, Feb 21, 2008 at 1:50 PM, Pyun YongHyeon <pyunyh at gmail.com> wrote:
 > > On Thu, Feb 21, 2008 at 11:03:02AM +1000, Robert Backhaus wrote:
 > >   > I am experiencing roughly 15% packet corruption on the re interface on
 > >   > my freebsd 7/amd64  box.
 > >   >
 > >   > FreeBSD gw.flexi.robbak.com 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #8:
 > >   > Tue Feb  5 09:49:55 EST 2008
 > >   > root at gw.flexi.robbak.com:/usr/obj/usr/src/sys/GW  amd64
 > >   >
 > >   > Just to make troubleshooting difficult, this problem only shows up
 > >   > after the system has been up for roughly 36 hours, depending on the
 > >   > amount of traffic.
 > >   >
 > >
 > >  I didn't take a look attached tcpdump files but I guess the
 > >  instability issue was fixed in HEAD. It's not yet MFCed but
 > >  I'll handle it in a week.
 > >
 > >  Would you try re(4) in HEAD?
 > >
 > 
 > OK, I'll do that. What is the best way to do that? csupping to "." seems a
 > bit drastic, and I don't do much with cvs proper. I take it that I should use
 > anon-cvs to grab the directory, but I don't quite know how.
 > 

Copy sys/dev/re/if_re.c, sys/pci/if_rlreg.h in HEAD to your box.
Due to lack of m_defrag(9) in 7-PRERELEASE/RC, you also have to add
that function to if_re.c(Copy m_defrag() in sys/kern/uipc_mbuf.c on
HEAD/RELENG_7 to if_re.c). That would make it build on your box.

 > >
 > >This is possibly a bit left field - but I experienced something like
 > >this once, and it was due to overheating - the edges of the (large) cpu
 > >heatsink hung over the circuitry concerned, preventing enough airflow
 > >and obviously offloading heat! So maybe check for something hot nearby
 > >to where the realtek stuff is.
 > >
 > >Cheers
 > 
 > Yes, I've been down the heat path, but the problem takes ~36 hours to recur
 > both if the system is turned on from cold, or simply rebooted. Mind you,
 > North Queensland could do with some cooling! I will take another look at the
 > circuitry if moving to HEAD's re doesn't fix it.

-- 
Regards,
Pyun YongHyeon


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