Re: [PATCH v5 09/16] kexec: enable KHO support for memory preservation

[Pratyush Yadav]

On Wed, Apr 02 2025, Pasha Tatashin wrote:

> On Wed, Apr 2, 2025 at 12:47 PM Pratyush Yadav <ptyadav@xxxxxxxxx> wrote:
>>
>> Hi,
>>
>> On Wed, Apr 02 2025, Changyuan Lyu wrote:
>>
>> > Hi Pratyush, Thanks for suggestions!
>> >
>> > On Thu, Mar 27, 2025 at 17:28:40 +0000, Pratyush Yadav <ptyadav@xxxxxxxxx> wrote:
[...]
>> >>
>> >> The memblock_reserve side we can optimize later, I agree. But the memory
>> >> preservation format is ABI and I think that is worth spending a little
>> >> more time on. And I don't think it should be that much more complex than
>> >> the current format.
>> >>
>> >> I want to hack around with it, so I'll give it a try over the next few
>> >> days and see what I can come up with.
>> >
>> > I agree with Jason that "nothing is ABI at this
>> > point" and it will take some time for KHO to stabilize.
>> >
>> > On the other hand if you have already came up with something working and
>> > simple, we can include it in the next version.
>>
>> I already have something that works with zero-order pages. I am
>> currently implementing support for other orders. It is almost done, but
>> I need to test it and do a performance comparison with the current
>> patch. Will post something soon!
>
> Hi Pratyush,
>
> Just to clarify, how soon? We are about to post v6 for KHO, with all
> other comments in this thread addressed.

I have it working, but I need to clean up the code a bit and test it
better. So hopefully end of this week or early next week.

-- 
Regards,
Pratyush Yadav