On Wed, Jan 20, 2021 at 05:36:04PM +0000, Will Deacon wrote: > Hi all, > > This is version four of the patches I previously posted here: > > v1: https://lore.kernel.org/r/20201209163950.8494-1-will@xxxxxxxxxx > v2: https://lore.kernel.org/r/20210108171517.5290-1-will@xxxxxxxxxx > v3: https://lore.kernel.org/r/20210114175934.13070-1-will@xxxxxxxxxx > > The patches allow architectures to opt-in at runtime for faultaround > mappings to be created as 'old' instead of 'young'. Although there have > been previous attempts at this, they failed either because the decision > was deferred to userspace [1] or because it was done unconditionally and > shown to regress benchmarks for particular architectures [2]. > > The big change since v3 is that the immutable fields of 'struct vm_fault' > now live in a 'const' anonymous struct. Although Clang will silently > accept modifications to these fields [3], GCC emits an error. The > resulting diffstat is _considerably_ more manageable with this approach. The only changes I have pending against this series are cosmetic (commit logs). Can I go ahead and queue this in the arm64 tree so that it can sit in linux-next for a bit? (positive or negative feedback appreciated!). Thanks, Will
