| Date | Tue, 18 Jan 2022 21:46:33 +0000 | From | Matthew Wilcox <> | Subject | Re: [RFC PATCH 0/6] Add support for shared PTEs across processes |
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On Tue, Jan 18, 2022 at 01:41:40PM -0800, Dave Hansen wrote: > On 1/18/22 1:19 PM, Khalid Aziz wrote: > > - Starting address must be aligned to pgdir size (512GB on x86_64) > > How does this work on systems with 5-level paging where a top-level page > table entry covers 256TB? Is the alignment requirement 512GB or 256TB? > How does userspace figure out which alignment requirement it is subject to?
The original idea was any power of two, naturally aligned, >= PAGE_SIZE, but I suspect Khalid has simplified it for this first implementation.
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