From: Dev Jain <dev.jain@arm•com>
To: Wen Jiang <jiangwenxiaomi@gmail•com>,
linux-mm@kvack•org, linux-arm-kernel@lists•infradead.org,
catalin.marinas@arm•com, will@kernel•org,
akpm@linux-foundation•org, urezki@gmail•com
Cc: baohua@kernel•org, Xueyuan.chen21@gmail•com, rppt@kernel•org,
david@kernel•org, ryan.roberts@arm•com,
anshuman.khandual@arm•com, ajd@linux•ibm.com,
linux-kernel@vger•kernel.org, jiangwen6@xiaomi•com
Subject: Re: [PATCH v3 1/6] arm64/hugetlb: Extend batching of multiple CONT_PTE in a single PTE setup
Date: Tue, 26 May 2026 13:26:10 +0530 [thread overview]
Message-ID: <cb0b4c9d-24d7-44b7-a4fc-a6ff5020111e@arm.com> (raw)
In-Reply-To: <20260522053146.83209-2-jiangwenxiaomi@gmail.com>
On 22/05/26 11:01 am, Wen Jiang wrote:
> From: "Barry Song (Xiaomi)" <baohua@kernel•org>
>
> For sizes aligned to CONT_PTE_SIZE and smaller than PMD_SIZE,
> we can batch CONT_PTE settings instead of handling them individually.
Better wording: "we can handle CONT_PTE_SIZE groups together"
>
> Signed-off-by: Barry Song (Xiaomi) <baohua@kernel•org>
> Signed-off-by: Wen Jiang <jiangwen6@xiaomi•com>
> Tested-by: Xueyuan Chen <xueyuan.chen21@gmail•com>
> ---
> arch/arm64/mm/hugetlbpage.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
> index a42c05cf56408..c4d8b226126cb 100644
> --- a/arch/arm64/mm/hugetlbpage.c
> +++ b/arch/arm64/mm/hugetlbpage.c
> @@ -110,6 +110,12 @@ static inline int num_contig_ptes(unsigned long size, size_t *pgsize)
> contig_ptes = CONT_PTES;
> break;
> default:
> + if (size > 0 && size < PMD_SIZE &&
> + IS_ALIGNED(size, CONT_PTE_SIZE)) {
> + contig_ptes = size >> PAGE_SHIFT;
> + *pgsize = PAGE_SIZE;
> + break;
> + }
> WARN_ON(!__hugetlb_valid_size(size));
> }
>
> @@ -359,6 +365,10 @@ pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags)
> case CONT_PTE_SIZE:
> return pte_mkcont(entry);
> default:
> + if (pagesize > 0 && pagesize < PMD_SIZE &&
> + IS_ALIGNED(pagesize, CONT_PTE_SIZE))
> + return pte_mkcont(entry);
> +
> break;
> }
> pr_warn("%s: unrecognized huge page size 0x%lx\n",
next prev parent reply other threads:[~2026-05-26 7:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-22 5:31 [PATCH v3 0/6] mm/vmalloc: Speed up ioremap, vmalloc and vmap with contiguous memory Wen Jiang
2026-05-22 5:31 ` [PATCH v3 1/6] arm64/hugetlb: Extend batching of multiple CONT_PTE in a single PTE setup Wen Jiang
2026-05-26 7:56 ` Dev Jain [this message]
2026-05-22 5:31 ` [PATCH v3 2/6] arm64/vmalloc: Allow arch_vmap_pte_range_map_size to batch multiple CONT_PTE Wen Jiang
2026-05-27 5:43 ` Dev Jain
2026-05-22 5:31 ` [PATCH v3 3/6] mm/vmalloc: Extract vmap_set_ptes() to consolidate PTE mapping logic Wen Jiang
2026-06-01 17:34 ` Uladzislau Rezki
2026-06-02 7:45 ` Wen Jiang
2026-05-22 5:31 ` [PATCH v3 4/6] mm/vmalloc: Extend page table walk to support larger page_shift sizes and eliminate page table rewalk Wen Jiang
2026-05-27 5:58 ` Dev Jain
2026-05-28 3:39 ` Wen Jiang
2026-05-29 5:28 ` Dev Jain
2026-06-05 6:02 ` Dev Jain
2026-05-22 5:31 ` [PATCH v3 5/6] mm/vmalloc: map contiguous pages in batches for vmap() if possible Wen Jiang
2026-05-27 8:27 ` Dev Jain
2026-05-28 3:42 ` Wen Jiang
2026-05-29 5:57 ` Dev Jain
2026-06-02 7:34 ` Wen Jiang
2026-05-22 5:31 ` [PATCH v3 6/6] mm/vmalloc: align vm_area so vmap() can batch mappings Wen Jiang
2026-05-23 7:53 ` Uladzislau Rezki
2026-05-27 6:25 ` Dev Jain
2026-06-02 8:57 ` Wen Jiang
2026-05-22 18:07 ` [PATCH v3 0/6] mm/vmalloc: Speed up ioremap, vmalloc and vmap with contiguous memory Andrew Morton
2026-05-23 8:26 ` Wen Jiang
2026-05-23 21:40 ` Andrew Morton
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