On 4 Apr 2022, at 12:06, Matthew Wilcox wrote: > On Mon, Apr 04, 2022 at 11:44:39AM -0400, Zi Yan wrote: >> I am wondering if my change is the right fix or not. folios with order>0 >> are still available when CONFIG_TRANSPARENT_HUGEPAGE is not set, right? > > That's the eventual plan, but it's not possible today. We need to > be able to split large folios (eg in truncation) and that functionality > is still under CONFIG_TRANSPARENT_HUGEPAGE in mm/huge_memory.c. So > large folios depend on CONFIG_TRANSPARENT_HUGEPAGE instead of having a > clean separation between functionality-to-support-PMD-mapping and > functionality-to-support-order>0. > > So I preferred your earlier patch because it's more obvious. I mean, > we could pull in the two or three patches from my tree that convert > these functions and their callers to folios ... we're only at rc1. > I can post them and see what others think. OK, I will send out my initial patch. -- Best Regards, Yan, Zi
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