From: Muchun Song <songmuchun@bytedance.com>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org,
linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Michal Hocko <mhocko@suse.com>, Peter Xu <peterx@redhat.com>,
Naoya Horiguchi <naoya.horiguchi@linux.dev>,
James Houghton <jthoughton@google.com>,
Mina Almasry <almasrymina@google.com>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
catalin.marinas@arm.com, will@kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 2/4] arm64/hugetlb: Implement arm64 specific hugetlb_mask_last_page
Date: Fri, 17 Jun 2022 16:26:23 +0800 [thread overview]
Message-ID: <Yqw6r0/r34sZdrsk@FVFYT0MHHV2J.usts.net> (raw)
In-Reply-To: <20220616210518.125287-3-mike.kravetz@oracle.com>
On Thu, Jun 16, 2022 at 02:05:16PM -0700, Mike Kravetz wrote:
> From: Baolin Wang <baolin.wang@linux.alibaba.com>
>
> The HugeTLB address ranges are linearly scanned during fork, unmap and
> remap operations, and the linear scan can skip to the end of range mapped
> by the page table page if hitting a non-present entry, which can help
> to speed linear scanning of the HugeTLB address ranges.
>
> So hugetlb_mask_last_page() is introduced to help to update the address in
> the loop of HugeTLB linear scanning with getting the last huge page mapped
> by the associated page table page[1], when a non-present entry is encountered.
>
> Considering ARM64 specific cont-pte/pmd size HugeTLB, this patch implemented
> an ARM64 specific hugetlb_mask_last_page() to help this case.
>
> [1] https://lore.kernel.org/linux-mm/20220527225849.284839-1-mike.kravetz@oracle.com/
>
> Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
> Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Thanks.
next prev parent reply other threads:[~2022-06-17 8:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-16 21:05 [PATCH 0/4] hugetlb: speed up linear address scanning Mike Kravetz
2022-06-16 21:05 ` [PATCH 1/4] hugetlb: skip to end of PT page mapping when pte not present Mike Kravetz
2022-06-17 8:13 ` Muchun Song
2022-06-17 11:26 ` kernel test robot
2022-06-17 21:09 ` Mike Kravetz
2022-06-17 14:15 ` Peter Xu
2022-06-17 15:26 ` Geert Uytterhoeven
2022-06-17 17:17 ` Mike Kravetz
2022-06-18 3:27 ` Baolin Wang
2022-06-17 17:06 ` kernel test robot
2022-06-16 21:05 ` [PATCH 2/4] arm64/hugetlb: Implement arm64 specific hugetlb_mask_last_page Mike Kravetz
2022-06-17 8:26 ` Muchun Song [this message]
2022-06-16 21:05 ` [PATCH 3/4] hugetlb: do not update address in huge_pmd_unshare Mike Kravetz
2022-06-16 21:05 ` [PATCH 4/4] hugetlb: Lazy page table copies in fork() Mike Kravetz
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