Messages in this thread | | | Date | Fri, 22 Jan 2010 22:53:04 +0100 | From | Jarek Poplawski <> | Subject | Re: Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync) |
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On Fri, Jan 22, 2010 at 01:01:15PM -0500, Michael Breuer wrote: > Kernel 2.6.32.4 (git) with the following patches applied: > > af_packet.c (tpacket_snd version 3) > sky2.c pskb_may_pull > sky2 fix WARNING at lib/dma-debug.c check_sync
I guess, you meant the "sky2.c receive_copy" patch which you tested earlier, or at least you managed to crash DMAR with that patch before crashing it with Stephen's "lib/dma-debug.c check_sync" patch, right?
> Running with CONFIG_DMAR=n, system is stable. > Running with the exact same source but CONFIG_DMAR=y I get the > WARNING (see below) after about 36 hours of uptime (has varied from > about 24 to about 48): > Smolt profile: http://smolt.fedoraproject.org/show?uuid=pub_bb05c701-1e47-4b3c-9fab-54f520f39d79+ > I'm also attaching dmesg.old (dmesg from the crash). > > Subsequent to this the system watchdog reboots the system (it's hung). > > Of interest: each and every time this has happened the system was > under heavy RX load (win7 backup to a cifs share hosted on this > server). Also, there is always a dhcp exchange of some sort > preceding the event. > > It is possible that the event is re creatable without DMAR enabled, > but I have been unsuccessful in doing so.
It would be nice to check now if it's re-creatable without the dhcp exchange yet, or at least dhcp through the switch and the router, because I suspect there might be something more than a simple drop on the switch that affects sky2 stability.
Jarek P.
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