linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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


  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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200619215649.32297-15-rcampbell@nvidia.com \
    --to=rcampbell@nvidia.com \
    --cc=akpm@linux-foundation.org \
    --cc=bskeggs@redhat.com \
    --cc=hch@lst.de \
    --cc=jgg@mellanox.com \
    --cc=jglisse@redhat.com \
    --cc=jhubbard@nvidia.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-kselftest@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-rdma@vger.kernel.org \
    --cc=nouveau@lists.freedesktop.org \
    --cc=shuah@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).