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Shutemov" , Roman Gushchin , Rik van Riel , Matthew Wilcox , Shakeel Butt , Yang Shi , Jason Gunthorpe , Mike Kravetz , Michal Hocko , David Hildenbrand , William Kucharski , Andrea Arcangeli , John Hubbard , David Nellans , linux-kernel@vger.kernel.org, Zi Yan Subject: [RFC PATCH v2 30/30] mm: thp: enable anonymous PUD THP at page fault path. Date: Mon, 28 Sep 2020 13:54:28 -0400 Message-Id: <20200928175428.4110504-31-zi.yan@sent.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200928175428.4110504-1-zi.yan@sent.com> References: <20200928175428.4110504-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Zi Yan All previous commits have anonymous PUD THP support ready, so we can enable anonymous PUD THP page fault now. Signed-off-by: Zi Yan --- mm/memory.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index 9f7b509a3aa7..dc285d9872fc 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4122,16 +4122,15 @@ static vm_fault_t create_huge_pud(struct vm_fault= *vmf) { #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && \ defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) - /* No support for anonymous transparent PUD pages yet */ if (vma_is_anonymous(vmf->vma)) - goto split; + return do_huge_pud_anonymous_page(vmf); if (vmf->vma->vm_ops->huge_fault) { vm_fault_t ret =3D vmf->vma->vm_ops->huge_fault(vmf, PE_SIZE_PUD); =20 if (!(ret & VM_FAULT_FALLBACK)) return ret; } -split: + /* COW or write-notify not handled on PUD level: split pud.*/ __split_huge_pud(vmf->vma, vmf->pud, vmf->address, false, NULL); #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ --=20 2.28.0