Re: RFC: remove set_fs for m68k

[Michael Schmitz <schmitzmic@gmail.com>]

Am 16.07.2021 um 14:03 schrieb Michael Schmitz:
> Hi Christoph,
>
> On 15/07/21 7:26 am, Michael Schmitz wrote:
>> I've got a vague recollection that I've seen weird crashes in the past
>> related to temperature extremes (we've had a few unusually cold days
>> in our parts just now), so I've gone back to a kernel from the switch
>> stack / refactoring exit tests (which ran the stress tests fine
>> earlier) to rule that one out. Looking good so far, so I begin to
>> wonder whether we need to introduce get_fc() and use that to restore
>> the original sfc/dfc instead of assuming USER_DATA is always correct?
>
> No crashes with the known good kernel after over a day of stress testing
> - I'll try Andreas' patch once the current test run has completed.
>
> One thing I noticed with either your final or your v2 patch series - as
> far as the tests ran at all, run times were 30% increased. That's a lot

With Andreas' patch applied, the run time increase is now less severe 
(11-13%). I'll repeat that a few more times but it's looking a lot 
better so far. No instruction format errors seen anymore.

Cheers,

	Michael