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Re: x86/stack protector: X86_32_LAZY_GS=n hangs kernel on old processors




> On Tue, Feb 13, 2018 at 11:40:17AM -0500, tedheadster wrote:
>>   in your patch "x86: make lazy %gs optional on x86_32" were you able
>> to test it on really old processors? In 4.16.0-rc1, X86_32_LAZY_GS got
>> toggled from 'y' to 'n' in my default config because of changes to the
>> stack protector code. It hangs my ancient i486 test machine right
>> after 'Booting the kernel'.
>
> I didn't have access to an i486 at the time or ever since, so it
> wasn't tested there.  If this is specific to i486, flagging it so in
> the config probably isn't the end of the world at this point.

Tejun,
  I will be able to test this on other 32bit hardware at the end of
the week. Hopefully I'll be able to identify which processors it does
not work on (i486/i586/i686).

- Matthew