Re: [PATCH v2] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge"
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2021-07-23 12:04:27
Also in:
linuxppc-dev, lkml
Will Deacon [off-list ref] writes:
On Wed, 21 Jul 2021 17:02:13 +1000, Michael Ellerman wrote:quoted
This reverts commit c742199a014de23ee92055c2473d91fe5561ffdf. c742199a014d ("mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge") breaks arm64 in at least two ways for configurations where PUD or PMD folding occur: 1. We no longer install huge-vmap mappings and silently fall back to page-granular entries, despite being able to install block entries at what is effectively the PGD level. [...]Thank you Michael! I owe you a beer next time I see you, if we don't go extinct before then.
No worries, thanks to Christophe for identifying the solution while on vacation! Beers seem a long way off, but hopefully one day :) cheers _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel