lkml.org 
[lkml]   [2012]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 1/2] mm: configure lruvec split by boot options
From
Date
This patch adds boot options:
lruvec_split=%u by default 1, limited by CONFIG_PAGE_LRU_SPLIT
lruvec_interleaving=%u by default CONFIG_PAGE_LRU_INTERLEAVING

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
---
include/linux/mm.h | 5 ++++-
mm/internal.h | 2 +-
mm/page_alloc.c | 29 +++++++++++++++++++++++++++++
3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d14db10..f042a34 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -737,12 +737,15 @@ static inline int page_lruvec_id(struct page *page)

#else /* CONFIG_PAGE_LRU_SPLIT */

+extern unsigned lruvec_split;
+extern unsigned lruvec_interleaving;
+
static inline int page_lruvec_id(struct page *page)
{

unsigned long pfn = page_to_pfn(page);

- return (pfn >> CONFIG_PAGE_LRU_INTERLEAVING) % CONFIG_PAGE_LRU_SPLIT;
+ return (pfn >> lruvec_interleaving) % lruvec_split;
}

#endif /* CONFIG_PAGE_LRU_SPLIT */
diff --git a/mm/internal.h b/mm/internal.h
index f429911..be7415b 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -17,7 +17,7 @@
for ( zone_id = 0 ; zone_id < MAX_NR_ZONES ; zone_id++ )

#define for_each_lruvec_id(lruvec_id) \
- for ( lruvec_id = 0 ; lruvec_id < CONFIG_PAGE_LRU_SPLIT ; lruvec_id++ )
+ for ( lruvec_id = 0 ; lruvec_id < lruvec_split ; lruvec_id++ )

#define for_each_zone_and_lruvec_id(zone_id, lruvec_id) \
for_each_zone_id(zone_id) for_each_lruvec_id(lruvec_id)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9b0cc92..1a899fa 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4303,6 +4303,35 @@ void init_zone_lruvec(struct zone *zone, struct lruvec *lruvec)
#endif
}

+#if CONFIG_PAGE_LRU_SPLIT != 1
+
+unsigned lruvec_split = 1;
+unsigned lruvec_interleaving = CONFIG_PAGE_LRU_INTERLEAVING;
+
+static int __init set_lruvec_split(char *arg)
+{
+ if (!kstrtouint(arg, 0, &lruvec_split) &&
+ lruvec_split >= 1 &&
+ lruvec_split <= CONFIG_PAGE_LRU_SPLIT)
+ return 0;
+ lruvec_split = 1;
+ return 1;
+}
+early_param("lruvec_split", set_lruvec_split);
+
+static int __init set_lruvec_interleaving(char *arg)
+{
+ if (!kstrtouint(arg, 0, &lruvec_interleaving) &&
+ lruvec_interleaving >= HPAGE_PMD_ORDER &&
+ lruvec_interleaving <= BITS_PER_LONG)
+ return 0;
+ lruvec_split = 1;
+ return 1;
+}
+early_param("lruvec_interleaving", set_lruvec_interleaving);
+
+#endif
+
/*
* Set up the zone data structures:
* - mark all pages reserved


\
 
 \ /
  Last update: 2012-02-23 19:51    [W:0.069 / U:4.564 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site