[Bug 88652] [BSW/SKL ppgtt Bisected]igt/gem_evict_everything/major-hang causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88652

--- Comment #32 from Ding Heng <hengx.ding at intel.com> ---
(In reply to Nick Hoath from comment #31)
> Hi,
>    What's the failure rate you're getting for 
> ./gem_evict_everything --run-subtest swapping-hang ?
> 
>    I've just run it on BDW with the latest nightly, and I'm getting a 1/10
> failure due to paging request BUG, with nothing to indicate
> 6d3d8274bc45de4babb62d64562d92af984dd238 is the cause.
> 
>    I can't run ./gem_evict_everything --run-subtest major-hang as there
> isn't enough memory on my system.


./gem_evict_everything --run-subtest swapping-hang 

I tried it with nightly commit
855932144a48a66081a62288bea6f2bbbf48e2e7(2015-02-28) on BDW and
0b2a1076c5cb4f383d6a8c940ffab1e27f241097(2015-02-25) on BSW, the reproducible
is 100%.

./gem_evict_everything --run-subtest major-hang 
This case need 6G free mem, I don't have a machine with so much mem available.
However, this case should be able to run before(refer to comment 25), and the
machine I use is the same as Lu Hua. What's the reason for this mem requirement
increasememn?

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