[Bug 81140] [HSW/BYT/BDW Bisected ]system sporadically boot fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81140

--- Comment #27 from Daniel Vetter <daniel at ffwll.ch> ---
Note: This seems to be only reproducible with the normal config.

Lu, please don't forget to add such crucial information from internal threads
here.

(In reply to comment #25)
> Created attachment 102897 [details]
> diff_configs

Please attach unified diff (i.e. diff -u) since I can't read traditional diff
output ;-)

A bunch of things to test:
- Please test 4c2e0990ade3251c9b5770aa8f06b06375b66f9f with the normal config
extensively and make sure it really works. This is the parent of the commit
which the offending patch tried to fix, so should have the same behaviour
really.
- Please test a4de05268e674e8ed31df6348269e22d6c6a1803 with the normal config
extensively and and make sure it really works. This is the patch which
introcuded the regression the offending patch claims to fix.
- Please take the normal config and change config options step-by-step (yeah,
this will take time so lower priority) until the kernel is stable. Then report
which config option makes the kernel stable. Since it usually just takes a few
reboots to hit the problem on broken kernels it's better to start with the
broken .config: That way you don't have to boot 10+ times to make sure it
really works, but can proceed to the next config option after the first hang.

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