[RFC,v2,10/30] fs: proc: add PUD THP kpageflag.

Message ID	20200928175428.4110504-11-zi.yan@sent.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=Qft/=DF=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CC3C821941 From: Zi Yan <zi.yan@sent.com> To: linux-mm@kvack.org Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Roman Gushchin <guro@fb.com>, Rik van Riel <riel@surriel.com>, Matthew Wilcox <willy@infradead.org>, Shakeel Butt <shakeelb@google.com>, Yang Shi <shy828301@gmail.com>, Jason Gunthorpe <jgg@nvidia.com>, Mike Kravetz <mike.kravetz@oracle.com>, Michal Hocko <mhocko@suse.com>, David Hildenbrand <david@redhat.com>, William Kucharski <william.kucharski@oracle.com>, Andrea Arcangeli <aarcange@redhat.com>, John Hubbard <jhubbard@nvidia.com>, David Nellans <dnellans@nvidia.com>, linux-kernel@vger.kernel.org, Zi Yan <ziy@nvidia.com> Subject: [RFC PATCH v2 10/30] fs: proc: add PUD THP kpageflag. Date: Mon, 28 Sep 2020 13:54:08 -0400 Message-Id: <20200928175428.4110504-11-zi.yan@sent.com> In-Reply-To: <20200928175428.4110504-1-zi.yan@sent.com> References: <20200928175428.4110504-1-zi.yan@sent.com> Reply-To: Zi Yan <ziy@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	1GB PUD THP support on x86_64 \| expand [RFC,v2,00/30] 1GB PUD THP support on x86_64 [RFC,v2,01/30] mm/pagewalk: use READ_ONCE when reading the PUD entry unlocked [RFC,v2,02/30] mm: pagewalk: use READ_ONCE when reading the PMD entry unlocked [RFC,v2,03/30] mm: thp: use single linked list for THP page table page deposit. [RFC,v2,04/30] mm: add new helper functions to allocate one PMD page with 512 PTE pages. [RFC,v2,05/30] mm: thp: add page table deposit/withdraw functions for PUD THP. [RFC,v2,06/30] mm: change thp_order and thp_nr as we will have not just PMD THPs. [RFC,v2,07/30] mm: thp: add anonymous PUD THP page fault support without enabling it. [RFC,v2,08/30] mm: thp: add PUD THP support for copy_huge_pud. [RFC,v2,09/30] mm: thp: add PUD THP support to zap_huge_pud. [RFC,v2,10/30] fs: proc: add PUD THP kpageflag. [RFC,v2,11/30] mm: thp: handling PUD THP reference bit. [RFC,v2,12/30] mm: rmap: add mappped/unmapped page order to anonymous page rmap functions. [RFC,v2,13/30] mm: rmap: add map_order to page_remove_anon_compound_rmap. [RFC,v2,14/30] mm: thp: add PUD THP split_huge_pud_page() function. [RFC,v2,15/30] mm: thp: add PUD THP to deferred split list when PUD mapping is gone. [RFC,v2,16/30] mm: debug: adapt dump_page to PUD THP. [RFC,v2,17/30] mm: thp: PUD THP COW splits PUD page and falls back to PMD page. [RFC,v2,18/30] mm: thp: PUD THP follow_p*d_page() support. [RFC,v2,19/30] mm: stats: make smap stats understand PUD THPs. [RFC,v2,20/30] mm: page_vma_walk: teach it about PMD-mapped PUD THP. [RFC,v2,21/30] mm: thp: PUD THP support in try_to_unmap(). [RFC,v2,22/30] mm: thp: split PUD THPs at page reclaim. [RFC,v2,23/30] mm: support PUD THP pagemap support. [RFC,v2,24/30] mm: madvise: add page size options to MADV_HUGEPAGE and MADV_NOHUGEPAGE. [RFC,v2,25/30] mm: vma: add VM_HUGEPAGE_PUD to vm_flags at bit 37. [RFC,v2,26/30] mm: thp: add a global knob to enable/disable PUD THPs. [RFC,v2,27/30] mm: thp: make PUD THP size public. [RFC,v2,28/30] hugetlb: cma: move cma reserve function to cma.c. [RFC,v2,29/30] mm: thp: use cma reservation for pud thp allocation. [RFC,v2,30/30] mm: thp: enable anonymous PUD THP at page fault path.

Message ID

20200928175428.4110504-11-zi.yan@sent.com (mailing list archive)

State

New, archived

Headers

DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CC3C821941
From: Zi Yan <zi.yan@sent.com>
To: linux-mm@kvack.org
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Roman Gushchin <guro@fb.com>,
	Rik van Riel <riel@surriel.com>,
	Matthew Wilcox <willy@infradead.org>,
	Shakeel Butt <shakeelb@google.com>,
	Yang Shi <shy828301@gmail.com>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Mike Kravetz <mike.kravetz@oracle.com>,
	Michal Hocko <mhocko@suse.com>,
	David Hildenbrand <david@redhat.com>,
	William Kucharski <william.kucharski@oracle.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	John Hubbard <jhubbard@nvidia.com>,
	David Nellans <dnellans@nvidia.com>,
	linux-kernel@vger.kernel.org,
	Zi Yan <ziy@nvidia.com>
Subject: [RFC PATCH v2 10/30] fs: proc: add PUD THP kpageflag.
Date: Mon, 28 Sep 2020 13:54:08 -0400
Message-Id: <20200928175428.4110504-11-zi.yan@sent.com>
In-Reply-To: <20200928175428.4110504-1-zi.yan@sent.com>
References: <20200928175428.4110504-1-zi.yan@sent.com>
Reply-To: Zi Yan <ziy@nvidia.com>
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Series

1GB PUD THP support on x86_64 | expand

Commit Message

Zi Yan Sept. 28, 2020, 5:54 p.m. UTC

From: Zi Yan <ziy@nvidia.com>

Bit 27 is used to identify PUD THP.

Signed-off-by: Zi Yan <ziy@nvidia.com>
---
 fs/proc/page.c                         | 2 ++
 include/uapi/linux/kernel-page-flags.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/fs/proc/page.c b/fs/proc/page.c
index f3b39a7d2bf3..e4e2ad3612c9 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -161,6 +161,8 @@  u64 stable_page_flags(struct page *page)
 			u |= BIT_ULL(KPF_ZERO_PAGE);
 			u |= BIT_ULL(KPF_THP);
 		}
+		if (compound_order(head) == HPAGE_PUD_ORDER)
+			u |= 1 << KPF_PUD_THP;
 	} else if (is_zero_pfn(page_to_pfn(page)))
 		u |= BIT_ULL(KPF_ZERO_PAGE);
 
diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h
index 6f2f2720f3ac..62c5fc70909b 100644
--- a/include/uapi/linux/kernel-page-flags.h
+++ b/include/uapi/linux/kernel-page-flags.h
@@ -36,5 +36,6 @@ 
 #define KPF_ZERO_PAGE		24
 #define KPF_IDLE		25
 #define KPF_PGTABLE		26
+#define KPF_PUD_THP		27
 
 #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */

[RFC,v2,10/30] fs: proc: add PUD THP kpageflag.

Commit Message

Patch