Re: [PATCHv9 00/14] mm, x86/cc: Implement support for unaccepted memory

Kirill A. Shutemov
2023-04-16T19:19:55Z

On Mon, Apr 03, 2023 at 04:42:54PM +0200, Vlastimil Babka wrote:
> Hmm yeah it can be noisy. Did you try to only count events that have
> fragmenting=1 and/or MIGRATE_MOVABLE as fallback_migratetype? As those are
> the really bad events.

I finally got around to retest it.

total fragmenting movable fragmenting&&movable
base-1: 957 583 353 0
base-2: 2715 2343 359 0
base-3: 2033 1669 353 0
patched-1: 1325 929 371 0
patched-2: 2844 2451 371 0
patched-3: 1304 917 361 0

fragmenting=1 is defined as fallback_order<pageblock_order which is most
of them.

Patched kernel showed slightly elevated movable(fallback_migratetype=1)
cases. Is it critical?

There's no allocations that is fragmenting and movable. Hm.

--
Kiryl Shutsemau / Kirill A. Shutemov