From: Ralph Campbell <rcampbell@nvidia.com>
To: <nouveau@lists.freedesktop.org>, <linux-rdma@vger.kernel.org>,
<linux-mm@kvack.org>, <linux-kselftest@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: Jerome Glisse <jglisse@redhat.com>,
John Hubbard <jhubbard@nvidia.com>,
Christoph Hellwig <hch@lst.de>,
Jason Gunthorpe <jgg@mellanox.com>,
"Ben Skeggs" <bskeggs@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>,
Ralph Campbell <rcampbell@nvidia.com>
Subject: [PATCH 14/16] mm/thp: add THP allocation helper
Date: Fri, 19 Jun 2020 14:56:47 -0700 [thread overview]
Message-ID: <20200619215649.32297-15-rcampbell@nvidia.com> (raw)
In-Reply-To: <20200619215649.32297-1-rcampbell@nvidia.com>
Transparent huge page allocation policy is controlled by several sysfs
variables. Rather than expose these to each device driver that needs to
allocate THPs, provide a helper function.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
---
include/linux/gfp.h | 10 ++++++++++
mm/huge_memory.c | 16 ++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 67a0774e080b..1c7d968a27d3 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -562,6 +562,16 @@ extern struct page *alloc_pages_vma(gfp_t gfp_mask, int order,
alloc_pages_vma(gfp_mask, 0, vma, addr, numa_node_id(), false)
#define alloc_page_vma_node(gfp_mask, vma, addr, node) \
alloc_pages_vma(gfp_mask, 0, vma, addr, node, false)
+#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
+extern struct page *alloc_transhugepage(struct vm_area_struct *vma,
+ unsigned long addr);
+#else
+static inline struct page *alloc_transhugepage(struct vm_area_struct *vma,
+ unsigned long addr)
+{
+ return NULL;
+}
+#endif
extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order);
extern unsigned long get_zeroed_page(gfp_t gfp_mask);
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 25d95f7b1e98..f749633ed350 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -775,6 +775,22 @@ vm_fault_t do_huge_pmd_anonymous_page(struct vm_fault *vmf)
return __do_huge_pmd_anonymous_page(vmf, page, gfp);
}
+#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
+struct page *alloc_transhugepage(struct vm_area_struct *vma,
+ unsigned long haddr)
+{
+ gfp_t gfp;
+ struct page *page;
+
+ gfp = alloc_hugepage_direct_gfpmask(vma);
+ page = alloc_hugepage_vma(gfp, vma, haddr, HPAGE_PMD_ORDER);
+ if (page)
+ prep_transhuge_page(page);
+ return page;
+}
+EXPORT_SYMBOL_GPL(alloc_transhugepage);
+#endif
+
static void insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr,
pmd_t *pmd, pfn_t pfn, pgprot_t prot, bool write,
pgtable_t pgtable)
--
2.20.1
next prev parent reply other threads:[~2020-06-19 21:58 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 21:56 [PATCH 00/16] mm/hmm/nouveau: THP mapping and migration Ralph Campbell
2020-06-19 21:56 ` [PATCH 01/16] mm: fix migrate_vma_setup() src_owner and normal pages Ralph Campbell
2020-06-19 21:56 ` [PATCH 02/16] nouveau: fix migrate page regression Ralph Campbell
2020-06-19 21:56 ` [PATCH 03/16] nouveau: fix mixed normal and device private page migration Ralph Campbell
2020-06-19 21:56 ` [PATCH 04/16] mm/hmm: fix test timeout on slower machines Ralph Campbell
2020-06-19 21:56 ` [PATCH 05/16] mm/hmm/test: remove redundant page table invalidate Ralph Campbell
2020-06-19 21:56 ` [PATCH 06/16] mm/hmm: test mixed normal and device private migrations Ralph Campbell
2020-06-19 21:56 ` [PATCH 07/16] nouveau: make nvkm_vmm_ctor() and nvkm_mmu_ptp_get() static Ralph Campbell
2020-06-19 21:56 ` [PATCH 08/16] nouveau/hmm: fault one page at a time Ralph Campbell
2020-06-22 17:22 ` Jason Gunthorpe
2020-06-22 18:44 ` Ralph Campbell
2020-06-19 21:56 ` [PATCH 09/16] mm/hmm: add output flag for compound page mapping Ralph Campbell
2020-06-22 17:25 ` Jason Gunthorpe
2020-06-22 18:10 ` Ralph Campbell
2020-06-22 23:18 ` Jason Gunthorpe
2020-06-22 23:26 ` Ralph Campbell
2020-06-19 21:56 ` [PATCH 10/16] nouveau/hmm: support mapping large sysmem pages Ralph Campbell
2020-06-19 21:56 ` [PATCH 11/16] hmm: add tests for HMM_PFN_COMPOUND flag Ralph Campbell
2020-06-19 21:56 ` [PATCH 12/16] mm/hmm: optimize migrate_vma_setup() for holes Ralph Campbell
2020-06-19 21:56 ` [PATCH 13/16] mm: support THP migration to device private memory Ralph Campbell
2020-06-21 23:20 ` Zi Yan
2020-06-22 19:36 ` Ralph Campbell
2020-06-22 20:10 ` Zi Yan
2020-06-22 21:31 ` Ralph Campbell
2020-06-22 21:53 ` Zi Yan
2020-06-22 22:30 ` Yang Shi
2020-06-22 22:33 ` Yang Shi
2020-06-22 23:01 ` John Hubbard
2020-06-22 23:54 ` Yang Shi
2020-06-23 0:05 ` Ralph Campbell
2020-06-23 2:51 ` Huang, Ying
2020-06-19 21:56 ` Ralph Campbell [this message]
2020-06-22 0:15 ` [PATCH 14/16] mm/thp: add THP allocation helper Zi Yan
2020-06-22 21:33 ` Ralph Campbell
2020-06-19 21:56 ` [PATCH 15/16] mm/hmm/test: add self tests for THP migration Ralph Campbell
2020-06-19 21:56 ` [PATCH 16/16] nouveau: support THP migration to private memory Ralph Campbell
2020-06-22 12:39 ` [PATCH 00/16] mm/hmm/nouveau: THP mapping and migration Jason Gunthorpe
2020-06-22 16:58 ` Ralph Campbell
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