linux-kernel - Re: [PATCH v2 2/6] mm: Introduce pXX_leaf

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Message-ID: <20201126124349.GQ4327@casper.infradead.org>
Date:   Thu, 26 Nov 2020 12:43:49 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kan.liang@...ux.intel.com, mingo@...nel.org, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, eranian@...gle.com, christophe.leroy@...roup.eu,
        npiggin@...il.com, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au, will@...nel.org, aneesh.kumar@...ux.ibm.com,
        sparclinux@...r.kernel.org, davem@...emloft.net,
        catalin.marinas@....com, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        dave.hansen@...el.com, kirill.shutemov@...ux.intel.com
Subject: Re: [PATCH v2 2/6] mm: Introduce pXX_leaf_size()

On Thu, Nov 26, 2020 at 01:01:16PM +0100, Peter Zijlstra wrote:
> A number of architectures have non-pagetable aligned huge/large pages.
> For such architectures a leaf can actually be part of a larger entry.
> 
> Provide generic helpers to determine the size of a page-table leaf.
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>