On 31/05/18 10:49, Russell King - ARM Linux wrote:
> On Tue, May 29, 2018 at 06:02:28PM +0100, Marc Zyngier wrote:
>> On Tue, 29 May 2018 15:55:01 +0100,
>> Russell King wrote:
>>>
>>> Warn at error level if the context switching function is not what we
>>> are expecting. This can happen with big.Little systems, which we
>>> currently do not support.
>>>
>>> Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
>>> Boot-tested-by: Tony Lindgren <t...@atomide.com>
>>> Reviewed-by: Tony Lindgren <t...@atomide.com>
>>
>> I assume this is a temporary situation until the ARM port grows the
>> necessary infrastructure to support this mitigation on heterogeneous
>> systems.
>
> As I've said, I think that is going to be a very difficult problem to
> resolve. I detailed why in previous emails, but it seems each time I
> do that, no one bothers to respond (presumably because no one has any
> ideas how to sort that problem either.)
>
> I believe that it's better to get some of the mitigations in the kernel
> and warn about non-supported setups than it is to hold it back.
I agree with you that it is better to get this merged quickly, and then
address exotic configurations (which are unfortunately quite common
these days) separately. I haven't had the time to try and understand how
to fix it though.
> I notice that you haven't replied to some of the patches (7 and 8),
> which makes me think that you have an issue with them - and as tonight
> is likely the last linux-next before the merge window, we're basically
> out of time to do another respin if there's something you don't like
> there and if we want to get them in during the next merge window.
Patches 7 and 8 didn't compile for me, and I had to fix-up things
manually in order to test it. Not that it should hold you back from
merging it.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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