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authorxu xin <xu.xin16@zte.com.cn>2023-06-13 06:09:42 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-08-18 20:12:10 +0300
commit1a8e84305783bddbae708f28178c6d0aa6321913 (patch)
tree17b13c3f2ff6b91b3ee2d494d1a9646fc518972d /mm/ksm.c
parent6080d19f07043ade61094d0f58b14c05e1694a39 (diff)
downloadlinux-1a8e84305783bddbae708f28178c6d0aa6321913.tar.xz
ksm: consider KSM-placed zeropages when calculating KSM profit
When use_zero_pages is enabled, the calculation of ksm profit is not correct because ksm zero pages is not counted in. So update the calculation of KSM profit including the documentation. Link: https://lkml.kernel.org/r/20230613030942.186041-1-yang.yang29@zte.com.cn Signed-off-by: xu xin <xu.xin16@zte.com.cn> Acked-by: David Hildenbrand <david@redhat.com> Cc: Xiaokai Ran <ran.xiaokai@zte.com.cn> Cc: Yang Yang <yang.yang29@zte.com.cn> Cc: Jiang Xuexin <jiang.xuexin@zte.com.cn> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/ksm.c')
-rw-r--r--mm/ksm.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index e1772081e8cb..97a9627116fa 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -3092,7 +3092,7 @@ static void wait_while_offlining(void)
#ifdef CONFIG_PROC_FS
long ksm_process_profit(struct mm_struct *mm)
{
- return mm->ksm_merging_pages * PAGE_SIZE -
+ return (long)(mm->ksm_merging_pages + mm->ksm_zero_pages) * PAGE_SIZE -
mm->ksm_rmap_items * sizeof(struct ksm_rmap_item);
}
#endif /* CONFIG_PROC_FS */
@@ -3373,7 +3373,7 @@ static ssize_t general_profit_show(struct kobject *kobj,
{
long general_profit;
- general_profit = ksm_pages_sharing * PAGE_SIZE -
+ general_profit = (ksm_pages_sharing + ksm_zero_pages) * PAGE_SIZE -
ksm_rmap_items * sizeof(struct ksm_rmap_item);
return sysfs_emit(buf, "%ld\n", general_profit);