Re: Regression of v4.6-rc vs. v4.5: hangs after a few minutes after boot

[Stefan Richter <stefanr@s5r6.in-berlin.de>]

On Apr 26 Stefan Richter wrote:
> v4.6-rc solidly hangs after a short while after boot, login to X11, and
> doing nothing much remarkable on the just brought up X desktop.
> 
> Hardware: x86-64, E3-1245 v3 (Haswell),
>           mainboard Supermicro X10SAE,
>           using integrated Intel graphics (HD P4600, i915 driver),
>           C226 PCH's AHCI and USB 2/3, ASMedia ASM1062 AHCI,
>           Intel LAN (i217, igb driver),
>           several IEEE 1394 controllers, some of them behind
>           PCIe bridges (IDT, PLX) or PCIe-to-PCI bridges (TI, Tundra)
>           and one PCI-to-CardBus bridge (Ricoh)
> 
> kernel.org kernel, Gentoo Linux userland
> 
> 1. known good:  v4.5-rc5 (gcc 4.9.3)
>    known bad:   v4.6-rc2 (gcc 4.9.3), only tried one time
> 
> 2. known good:  v4.5.2 (gcc 5.2.0)
>    known bad:   v4.6-rc5 (gcc 5.2.0), only tried one time
> 
> I will send my linux-4.6-rc5/.config in a follow-up message.

After it proved impossible to capture an oops through netconsole, I
started git bisect.  This will apparently take almost a week, as git
estimated 13 bisection steps and I will be allowing about 12 hours of
uptime as a sign for a good kernel.  (In my four or five tests of bad
kernels before I started bisection, they hung after 3 minutes...5.5 hours
uptime, with no discernible difference in workload.  Maybe 12 h cutoff is
even too short...)
-- 
Stefan Richter
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http://arcgraph.de/sr/