On 1/20/2012 11:44 AM, Michael Breuer wrote:

On 1/20/2012 11:26 AM, Stephen Hemminger wrote:

quoted

On Mon, 16 Jan 2012 11:39:13 -0500
Michael Breuer[off-list ref]  wrote:

quoted

Synopsis:

Receiving DMAR and other errors after approximately three days of
uptime. The symptoms exactly match errors seen and then fixed around
2.6.32.4.

While the system remains unaffected for too long to do a bisect, I was
able to confirm that the problem exists in the 3.1 stable branch (I
jumped from 3.0 to 3.2 when 3.2. was released).

For now I reverted to the sky2.c from 3.0.9 and am running the rest of
the kernel from 3.1.2, but won't be certain that this works until later
in the week.

Note that 20 seconds prior to the log extract below were DHCP renewal
attempts on eth1, the issue below was on eth0. Not sure it's relevant,
however back in 2010 a preceding DHCP event did turn out to be relevant
to the manifestation of the bug.

The 3.2.1-dirty I'm running is from git with a single local patch - for
sidewinder force-feedback support (shouldn't be relevant to the sky2 
issue).

Log extract:

Jan 16 05:49:46 mail kernel: [198230.628919] DRHD: handling fault 
status
reg 2
[snip]

Which exact chip version is this?
   dmesg | grep sky2
   lspci

[    9.927143] sky2: driver version 1.29
[    9.927166] sky2 0000:06:00.0: PCI INT A -> GSI 18 (level, low) -> 
IRQ 18
[    9.927177] sky2 0000:06:00.0: setting latency timer to 64
[    9.927254] sky2 0000:06:00.0: Yukon-2 EC Ultra chip revision 3
[    9.927339] sky2 0000:06:00.0: irq 71 for MSI/MSI-X
[    9.927562] sky2 0000:06:00.0: eth0: addr 00:26:18:00:1c:3b
[    9.927578] sky2 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> 
IRQ 17
[    9.927586] sky2 0000:04:00.0: setting latency timer to 64
[    9.927640] sky2 0000:04:00.0: Yukon-2 EC Ultra chip revision 3
[    9.927718] sky2 0000:04:00.0: irq 72 for MSI/MSI-X
[    9.927856] sky2 0000:04:00.0: eth1: addr 00:26:18:00:1c:3a
[   23.468135] sky2 0000:06:00.0: eth0: enabling interface
[   25.709668] sky2 0000:04:00.0: eth1: enabling interface
[   25.981841] sky2 0000:06:00.0: eth0: Link is up at 1000 Mbps, full 
duplex, fl    ow control both
[   27.418742] sky2 0000:04:00.0: eth1: Link is up at 100 Mbps, full 
duplex, flo    w control rx

04:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 
PCI-E Gigabit Ethernet Controller (rev 14)
05:00.0 IDE interface: Marvell Technology Group Ltd. 88SE6121 SATA II 
Controller (rev b2)
06:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 
PCI-E Gigabit Ethernet Controller (rev 14)

Seems I spoke too soon... Got the sky2 crash again early this morning 
after five days up.

Not sure how I can do any sort of bisect without narrowing down the 
possible culprits.