Re: [PATCH v17 11/26] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW
From: Borislav Petkov <bp@alien8.de>
Date: 2021-01-25 22:16:32
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On Mon, Jan 25, 2021 at 01:27:51PM -0800, Yu, Yu-cheng wrote:
quoted
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.
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