linux-kernel - Re: [PATCH] tlb/hugetlb: Add framework to handle PGDIR

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Message-ID: <20220413101926.GX2731@worktop.programming.kicks-ass.net>
Date:   Wed, 13 Apr 2022 12:19:26 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     inux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Will Deacon <will@...nel.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Nick Piggin <npiggin@...il.com>, Arnd Bergmann <arnd@...db.de>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tlb/hugetlb: Add framework to handle PGDIR_SIZE HugeTLB
 pages

On Wed, Apr 13, 2022 at 03:37:14PM +0530, Anshuman Khandual wrote:
> Change tlb_remove_huge_tlb_entry() to accommodate larger PGDIR_SIZE HugeTLB
> pages via adding a new helper tlb_flush_pgd_range(). While here also update
> struct mmu_gather as required, that is add a new member cleared_pgds.

I'm assuming Power will use this? Perhaps best to include it in a series
that actually makes use of it.

Other than that, looks good.