From: Zi Yan <zi.yan@sent.com>
To: Dave Hansen <dave.hansen@linux.intel.com>,
Yang Shi <yang.shi@linux.alibaba.com>,
Keith Busch <keith.busch@intel.com>,
Fengguang Wu <fengguang.wu@intel.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: Daniel Jordan <daniel.m.jordan@oracle.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>,
Javier Cabezas <jcabezas@nvidia.com>,
David Nellans <dnellans@nvidia.com>, Zi Yan <ziy@nvidia.com>
Subject: [RFC PATCH 05/25] mm: migrate: Add vm.accel_page_copy in sysfs to control page copy acceleration.
Date: Wed, 3 Apr 2019 19:00:26 -0700 [thread overview]
Message-ID: <20190404020046.32741-6-zi.yan@sent.com> (raw)
In-Reply-To: <20190404020046.32741-1-zi.yan@sent.com>
From: Zi Yan <ziy@nvidia.com>
Since base page migration did not gain any speedup from
multi-threaded methods, we only accelerate the huge page case.
Signed-off-by: Zi Yan <ziy@nvidia.com>
---
kernel/sysctl.c | 11 +++++++++++
mm/migrate.c | 6 ++++++
2 files changed, 17 insertions(+)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index e5da394..3d8490e 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -101,6 +101,8 @@
#if defined(CONFIG_SYSCTL)
+extern int accel_page_copy;
+
/* External variables not in a header file. */
extern int suid_dumpable;
#ifdef CONFIG_COREDUMP
@@ -1430,6 +1432,15 @@ static struct ctl_table vm_table[] = {
.extra2 = &one,
},
#endif
+ {
+ .procname = "accel_page_copy",
+ .data = &accel_page_copy,
+ .maxlen = sizeof(accel_page_copy),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
{
.procname = "hugetlb_shm_group",
.data = &sysctl_hugetlb_shm_group,
diff --git a/mm/migrate.c b/mm/migrate.c
index dd6ccbe..8a344e2 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -55,6 +55,8 @@
#include "internal.h"
+int accel_page_copy = 1;
+
/*
* migrate_prep() needs to be called before we start compiling a list of pages
* to be migrated using isolate_lru_page(). If scheduling work on other CPUs is
@@ -589,6 +591,10 @@ static void copy_huge_page(struct page *dst, struct page *src,
nr_pages = hpage_nr_pages(src);
}
+ /* Try to accelerate page migration if it is not specified in mode */
+ if (accel_page_copy)
+ mode |= MIGRATE_MT;
+
if (mode & MIGRATE_MT)
rc = copy_page_multithread(dst, src, nr_pages);
--
2.7.4
next prev parent reply other threads:[~2019-04-04 2:01 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-04 2:00 [RFC PATCH 00/25] Accelerate page migration and use memcg for PMEM management Zi Yan
2019-04-04 2:00 ` [RFC PATCH 01/25] mm: migrate: Change migrate_mode to support combination migration modes Zi Yan
2019-04-04 2:00 ` [RFC PATCH 02/25] mm: migrate: Add mode parameter to support future page copy routines Zi Yan
2019-04-04 2:00 ` [RFC PATCH 03/25] mm: migrate: Add a multi-threaded page migration function Zi Yan
2019-04-04 2:00 ` [RFC PATCH 04/25] mm: migrate: Add copy_page_multithread into migrate_pages Zi Yan
2019-04-04 2:00 ` Zi Yan [this message]
2019-04-04 2:00 ` [RFC PATCH 06/25] mm: migrate: Make the number of copy threads adjustable via sysctl Zi Yan
2019-04-04 2:00 ` [RFC PATCH 07/25] mm: migrate: Add copy_page_dma to use DMA Engine to copy pages Zi Yan
2019-04-04 2:00 ` [RFC PATCH 08/25] mm: migrate: Add copy_page_dma into migrate_page_copy Zi Yan
2019-04-04 2:00 ` [RFC PATCH 09/25] mm: migrate: Add copy_page_lists_dma_always to support copy a list of pages Zi Yan
2019-04-04 2:00 ` [RFC PATCH 10/25] mm: migrate: copy_page_lists_mt() to copy a page list using multi-threads Zi Yan
2019-04-04 2:00 ` [RFC PATCH 11/25] mm: migrate: Add concurrent page migration into move_pages syscall Zi Yan
2019-04-04 2:00 ` [RFC PATCH 12/25] exchange pages: new page migration mechanism: exchange_pages() Zi Yan
2019-04-04 2:00 ` [RFC PATCH 13/25] exchange pages: add multi-threaded exchange pages Zi Yan
2019-04-04 2:00 ` [RFC PATCH 14/25] exchange pages: concurrent " Zi Yan
2019-04-04 2:00 ` [RFC PATCH 15/25] exchange pages: exchange anonymous page and file-backed page Zi Yan
2019-04-04 2:00 ` [RFC PATCH 16/25] exchange page: Add THP exchange support Zi Yan
2019-04-04 2:00 ` [RFC PATCH 17/25] exchange page: Add exchange_page() syscall Zi Yan
2019-04-04 2:00 ` [RFC PATCH 18/25] memcg: Add per node memory usage&max stats in memcg Zi Yan
2019-04-04 2:00 ` [RFC PATCH 19/25] mempolicy: add MPOL_F_MEMCG flag, enforcing memcg memory limit Zi Yan
2019-04-04 2:00 ` [RFC PATCH 20/25] memory manage: Add memory manage syscall Zi Yan
2019-04-04 2:00 ` [RFC PATCH 21/25] mm: move update_lru_sizes() to mm_inline.h for broader use Zi Yan
2019-04-04 2:00 ` [RFC PATCH 22/25] memory manage: active/inactive page list manipulation in memcg Zi Yan
2019-04-04 2:00 ` [RFC PATCH 23/25] memory manage: page migration based page manipulation between NUMA nodes Zi Yan
2019-04-04 2:00 ` [RFC PATCH 24/25] memory manage: limit migration batch size Zi Yan
2019-04-04 2:00 ` [RFC PATCH 25/25] memory manage: use exchange pages to memory manage to improve throughput Zi Yan
2019-04-04 7:13 ` [RFC PATCH 00/25] Accelerate page migration and use memcg for PMEM management Michal Hocko
2019-04-05 0:32 ` Yang Shi
2019-04-05 17:20 ` Zi Yan
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