This patch introduces a parameters cache_reclaim_weight. It is used to
speed up page cache reclaim.
Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx>
---
include/linux/swap.h | 3 +++
kernel/sysctl.c | 9 +++++++++
mm/vmscan.c | 6 ++++++
3 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h
index bd85493..db912b2 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -361,6 +361,9 @@ extern unsigned long vm_cache_limit_mbytes_min;
extern unsigned long vm_cache_limit_mbytes_max;
extern unsigned long vm_cache_reclaim_s;
extern unsigned long vm_cache_reclaim_s_min;
+extern unsigned long vm_cache_reclaim_weight;
+extern unsigned long vm_cache_reclaim_weight_min;
+extern unsigned long vm_cache_reclaim_weight_max;
extern int cache_limit_ratio_sysctl_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos);
extern int cache_limit_mbytes_sysctl_handler(struct ctl_table *table, int write,
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index a8a09c4..452e0d3 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1298,6 +1298,15 @@ static struct ctl_table vm_table[] = {
.proc_handler = proc_doulongvec_minmax,
.extra1 = &vm_cache_reclaim_s_min,
},
+ {
+ .procname = "cache_reclaim_weight",
+ .data = &vm_cache_reclaim_weight,
+ .maxlen = sizeof(vm_cache_reclaim_weight),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ .extra1 = &vm_cache_reclaim_weight_min,
+ .extra2 = &vm_cache_reclaim_weight_max,
+ },
#ifdef CONFIG_COMPACTION
{
.procname = "compact_memory",
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d7f866e..d179be6 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -139,6 +139,9 @@ unsigned long vm_cache_limit_mbytes_min;
unsigned long vm_cache_limit_mbytes_max;
unsigned long vm_cache_reclaim_s __read_mostly;
unsigned long vm_cache_reclaim_s_min;
+unsigned long vm_cache_reclaim_weight __read_mostly;
+unsigned long vm_cache_reclaim_weight_min;
+unsigned long vm_cache_reclaim_weight_max;
static DEFINE_PER_CPU(struct delayed_work, vmscan_work);
static LIST_HEAD(shrinker_list);
@@ -3410,6 +3413,9 @@ static void shrink_page_cache_init(void)
vm_cache_limit_mbytes_max = totalram_pages;
vm_cache_reclaim_s = 0;
vm_cache_reclaim_s_min = 0;
+ vm_cache_reclaim_weight = 1;
+ vm_cache_reclaim_weight_min = 1;
+ vm_cache_reclaim_weight_max = 100;
for_each_online_cpu(cpu) {
struct delayed_work *work = &per_cpu(vmscan_work, cpu);
--
1.6.0.2
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>