Messages in this thread | | | Date | Mon, 25 Jan 2021 22:55:58 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH v17 11/26] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW |
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On Mon, Jan 25, 2021 at 01:27:51PM -0800, Yu, Yu-cheng wrote: > > Maybe I'm missing something but those two can happen outside of the > > loop, no? Or is *ptep somehow changing concurrently while the loop is > > doing the CMPXCHG and you need to recreate it each time? > > > > IOW, you can generate upfront and do the empty loop... > > *ptep can change concurrently.
Care to elaborate?
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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