Re: [PATCH 0/3]: x86, fpu: unlazy_fpu fixes/cleanups

[Dave Hansen]

On 01/29/2015 01:07 PM, Oleg Nesterov wrote:
> On 01/23, Rik van Riel wrote:
>> > Not only is this broken with my new code, but it looks like it may
>> > be broken with the current code, too...
> Lets (try to) fix unlazy_fpu/save_init_fpu at least.
> 
> Dave, fpu_save_init() in do_bounds() and task_get_bounds_dir() looks
> wrong too, shouldn't it use unlazy_fpu() ? See the changelog in 3/3.

IIRC, the 'cpu_has_xsaveopt' on the CPUs that support will MPX will
enable eagerfpu.  It's a bit of an indirect way to avoid the WARN_ON()
and probably needs a better comment.
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