[RFC,10/31] mm: proc: add 1GB THP kpageflag.

Message ID	20190215220856.29749-11-zi.yan@sent.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <owner-linux-mm@kvack.org> Received-SPF: pass (google.com: domain of zi.yan@sent.com designates 64.147.123.25 as permitted sender) client-ip=64.147.123.25; From: Zi Yan <zi.yan@sent.com> To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Dave Hansen <dave.hansen@linux.intel.com>, Michal Hocko <mhocko@kernel.org>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Andrew Morton <akpm@linux-foundation.org>, Vlastimil Babka <vbabka@suse.cz>, Mel Gorman <mgorman@techsingularity.net>, John Hubbard <jhubbard@nvidia.com>, Mark Hairgrove <mhairgrove@nvidia.com>, Nitin Gupta <nigupta@nvidia.com>, David Nellans <dnellans@nvidia.com>, Zi Yan <ziy@nvidia.com> Subject: [RFC PATCH 10/31] mm: proc: add 1GB THP kpageflag. Date: Fri, 15 Feb 2019 14:08:35 -0800 Message-Id: <20190215220856.29749-11-zi.yan@sent.com> In-Reply-To: <20190215220856.29749-1-zi.yan@sent.com> References: <20190215220856.29749-1-zi.yan@sent.com> Reply-To: ziy@nvidia.com MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	Generating physically contiguous memory after page allocation \| expand [RFC,00/31] Generating physically contiguous memory after page allocation [RFC,01/31] mm: migrate: Add exchange_pages to exchange two lists of pages. [RFC,02/31] mm: migrate: Add THP exchange support. [RFC,03/31] mm: migrate: Add tmpfs exchange support. [RFC,04/31] mm: add mem_defrag functionality. [RFC,05/31] mem_defrag: split a THP if either src or dst is THP only. [RFC,06/31] mm: Make MAX_ORDER configurable in Kconfig for buddy allocator. [RFC,07/31] mm: deallocate pages with order > MAX_ORDER. [RFC,08/31] mm: add pagechain container for storing multiple pages. [RFC,09/31] mm: thp: 1GB anonymous page implementation. [RFC,10/31] mm: proc: add 1GB THP kpageflag. [RFC,11/31] mm: debug: print compound page order in dump_page(). [RFC,12/31] mm: stats: Separate PMD THP and PUD THP stats. [RFC,13/31] mm: thp: 1GB THP copy on write implementation. [RFC,14/31] mm: thp: handling 1GB THP reference bit. [RFC,15/31] mm: thp: add 1GB THP split_huge_pud_page() function. [RFC,16/31] mm: thp: check compound_mapcount of PMD-mapped PUD THPs at free time. [RFC,17/31] mm: thp: split properly PMD-mapped PUD THP to PTE-mapped PUD THP. [RFC,18/31] mm: page_vma_walk: teach it about PMD-mapped PUD THP. [RFC,19/31] mm: thp: 1GB THP support in try_to_unmap(). [RFC,20/31] mm: thp: split 1GB THPs at page reclaim. [RFC,21/31] mm: thp: 1GB zero page shrinker. [RFC,22/31] mm: thp: 1GB THP follow_p*d_page() support. [RFC,23/31] mm: support 1GB THP pagemap support. [RFC,24/31] sysctl: add an option to only print the head page virtual address. [RFC,25/31] mm: thp: add a knob to enable/disable 1GB THPs. [RFC,26/31] mm: thp: promote PTE-mapped THP to PMD-mapped THP. [RFC,27/31] mm: thp: promote PMD-mapped PUD pages to PUD-mapped PUD pages. [RFC,28/31] mm: vmstats: add page promotion stats. [RFC,29/31] mm: madvise: add madvise options to split PMD and PUD THPs. [RFC,30/31] mm: mem_defrag: thp: PMD THP and PUD THP in-place promotion support. [RFC,31/31] sysctl: toggle to promote PUD-mapped 1GB THP or not.

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20190215220856.29749-11-zi.yan@sent.com (mailing list archive)

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New, archived

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Received-SPF: pass (google.com: domain of zi.yan@sent.com designates
 64.147.123.25 as permitted sender) client-ip=64.147.123.25;
From: Zi Yan <zi.yan@sent.com>
To: linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
	Michal Hocko <mhocko@kernel.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vlastimil Babka <vbabka@suse.cz>,
	Mel Gorman <mgorman@techsingularity.net>,
	John Hubbard <jhubbard@nvidia.com>,
	Mark Hairgrove <mhairgrove@nvidia.com>,
	Nitin Gupta <nigupta@nvidia.com>,
	David Nellans <dnellans@nvidia.com>,
	Zi Yan <ziy@nvidia.com>
Subject: [RFC PATCH 10/31] mm: proc: add 1GB THP kpageflag.
Date: Fri, 15 Feb 2019 14:08:35 -0800
Message-Id: <20190215220856.29749-11-zi.yan@sent.com>
In-Reply-To: <20190215220856.29749-1-zi.yan@sent.com>
References: <20190215220856.29749-1-zi.yan@sent.com>
Reply-To: ziy@nvidia.com
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: owner-linux-mm@kvack.org
Precedence: bulk

Series

Generating physically contiguous memory after page allocation | expand

Commit Message

Zi Yan Feb. 15, 2019, 10:08 p.m. UTC

From: Zi Yan <ziy@nvidia.com>

Bit 27 is used to identify 1GB THP.

Signed-off-by: Zi Yan <ziy@nvidia.com>
---
 fs/proc/page.c                         | 2 ++
 include/uapi/linux/kernel-page-flags.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/fs/proc/page.c b/fs/proc/page.c
index 40b05e0d4274..5d1471a6082a 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -138,6 +138,8 @@  u64 stable_page_flags(struct page *page)
 			u |= 1 << KPF_ZERO_PAGE;
 			u |= 1 << KPF_THP;
 		}
+		if (compound_order(head) == HPAGE_PUD_ORDER)
+			u |= 1 << KPF_PUD_THP;
 	} else if (is_zero_pfn(page_to_pfn(page)))
 		u |= 1 << KPF_ZERO_PAGE;
 
diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h
index 21b9113c69da..743bd730917d 100644
--- a/include/uapi/linux/kernel-page-flags.h
+++ b/include/uapi/linux/kernel-page-flags.h
@@ -36,5 +36,7 @@ 
 #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,10/31] mm: proc: add 1GB THP kpageflag.

Commit Message

Patch