Bug#701189: linux-image-3.7-trunk-amd64: 3.7.8 locks up occasionally

[Christian Ohm <chr.ohm@gmx.net>]

> On Monday, 25 February 2013 at  4:10, Ben Hutchings wrote:
> > Instead of updating to 3.7.9, I'll be uploading 3.8 to experimental
> > shortly.  Could you report whether that is more stable, once you've used
> > it for a while?

So far, I've had two more hangs under 3.7, but in general it was pretty
ok. 3.8 didn't hang in the short time I tried it, but it lost the
network card pretty soon after booting, spamming the kernel log with
lots of "atl1c 0000:02:00.0: PCI-DMA: Out of IOMMU space for 1522 bytes"
(with different sizes). Google gives
https://bugzilla.redhat.com/show_bug.cgi?id=918393 which indicates that
the just released kernel 3.8.4 includes a fix for that. I've also found
https://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.8/ChangeLog-3.8-1
saying "2) PCI dma mapping errors in atl1c are not checked for and this
cause hard crashes for some users, from Xiong Huang." which seems to be
the cause of the broken network, and also might be a fix for the hangs
in 3.7.

Best regards,
Christian Ohm