From: Peter Xu <peterx@redhat.com>
To: Miaohe Lin <linmiaohe@huawei.com>
Cc: akpm@linux-foundation.org, ziy@nvidia.com, willy@infradead.org,
william.kucharski@oracle.com, vbabka@suse.cz,
yulei.kernel@gmail.com, walken@google.com,
aneesh.kumar@linux.ibm.com, rcampbell@nvidia.com,
thomas_os@shipmail.org, yang.shi@linux.alibaba.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH v2 1/6] mm/huge_memory.c: rework the function vma_adjust_trans_huge()
Date: Tue, 16 Mar 2021 16:40:34 -0400 [thread overview]
Message-ID: <20210316204034.GE395976@xz-x1> (raw)
In-Reply-To: <20210316124007.20474-2-linmiaohe@huawei.com>
On Tue, Mar 16, 2021 at 08:40:02AM -0400, Miaohe Lin wrote:
> +static inline void split_huge_pmd_if_needed(struct vm_area_struct *vma, unsigned long address)
> +{
> + /*
> + * If the new address isn't hpage aligned and it could previously
> + * contain an hugepage: check if we need to split an huge pmd.
> + */
> + if (address & ~HPAGE_PMD_MASK &&
> + range_in_vma(vma, address & HPAGE_PMD_MASK,
> + (address & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE))
Since you're at it, maybe use ALIGN/ALIGN_DOWN too against HPAGE_PMD_SIZE?
> + split_huge_pmd_address(vma, address, false, NULL);
> +}
--
Peter Xu
next prev parent reply other threads:[~2021-03-16 20:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 12:40 [PATCH v2 0/6] Some cleanups for huge_memory Miaohe Lin
2021-03-16 12:40 ` [PATCH v2 1/6] mm/huge_memory.c: rework the function vma_adjust_trans_huge() Miaohe Lin
2021-03-16 20:40 ` Peter Xu [this message]
2021-03-17 2:18 ` Miaohe Lin
2021-03-17 13:07 ` Peter Xu
2021-03-16 12:40 ` [PATCH v2 2/6] mm/huge_memory.c: make get_huge_zero_page() return bool Miaohe Lin
2021-03-16 12:40 ` [PATCH v2 3/6] mm/huge_memory.c: rework the function do_huge_pmd_numa_page() slightly Miaohe Lin
2021-03-16 12:40 ` [PATCH v2 4/6] mm/huge_memory.c: remove redundant PageCompound() check Miaohe Lin
2021-03-16 12:40 ` [PATCH v2 5/6] mm/huge_memory.c: remove unused macro TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG Miaohe Lin
2021-03-16 12:40 ` [PATCH v2 6/6] mm/huge_memory.c: use helper function migration_entry_to_page() Miaohe Lin
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