* [PATCH v2 0/2] KSM: Optimizations for rmap_walk_ksm
@ 2026-02-06 9:55 xu.xin16
0 siblings, 0 replies; 3+ messages in thread
From: xu.xin16 @ 2026-02-06 9:55 UTC (permalink / raw)
To: david, akpm
Cc: chengming.zhou, hughd, wang.yaxin, yang.yang29, linux-mm, linux-kernel
From: xu xin <xu.xin16@zte.com.cn>
There are two perfomance optimization patches for rmap_walk_ksm.
The patch [1/2] move the initializaion of addr from the position inside loop
to the position before the loop, since the variable will not change in the
loop.
The patch [2/2] optimize rmap_walk_ksm by passing a suitable page offset range
to the anon_vma_interval_tree_foreach loop to reduce ineffective checks.
The metric performance is seen at patch[2/2].
xu xin (2):
ksm: Initialize the addr only once in rmap_walk_ksm
ksm: Optimize rmap_walk_ksm by passing a suitable address range
mm/ksm.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
--
2.25.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH v2 0/2] KSM: Optimizations for rmap_walk_ksm
@ 2026-02-06 9:56 xu.xin16
2026-02-06 10:47 ` David Hildenbrand (Arm)
0 siblings, 1 reply; 3+ messages in thread
From: xu.xin16 @ 2026-02-06 9:56 UTC (permalink / raw)
To: david, akpm
Cc: chengming.zhou, hughd, wang.yaxin, yang.yang29, linux-mm,
linux-kernel, xu.xin16
From: xu xin <xu.xin16@zte.com.cn>
There are two perfomance optimization patches for rmap_walk_ksm.
The patch [1/2] move the initializaion of addr from the position inside loop
to the position before the loop, since the variable will not change in the
loop.
The patch [2/2] optimize rmap_walk_ksm by passing a suitable page offset range
to the anon_vma_interval_tree_foreach loop to reduce ineffective checks.
The metric performance is seen at patch[2/2].
xu xin (2):
ksm: Initialize the addr only once in rmap_walk_ksm
ksm: Optimize rmap_walk_ksm by passing a suitable address range
mm/ksm.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
--
2.25.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2 0/2] KSM: Optimizations for rmap_walk_ksm
2026-02-06 9:56 xu.xin16
@ 2026-02-06 10:47 ` David Hildenbrand (Arm)
0 siblings, 0 replies; 3+ messages in thread
From: David Hildenbrand (Arm) @ 2026-02-06 10:47 UTC (permalink / raw)
To: xu.xin16, akpm
Cc: chengming.zhou, hughd, wang.yaxin, yang.yang29, linux-mm, linux-kernel
On 2/6/26 10:56, xu.xin16@zte.com.cn wrote:
> From: xu xin <xu.xin16@zte.com.cn>
>
> There are two perfomance optimization patches for rmap_walk_ksm.
>
> The patch [1/2] move the initializaion of addr from the position inside loop
> to the position before the loop, since the variable will not change in the
> loop.
>
> The patch [2/2] optimize rmap_walk_ksm by passing a suitable page offset range
> to the anon_vma_interval_tree_foreach loop to reduce ineffective checks.
>
> The metric performance is seen at patch[2/2].
For the future, we usually describe what changed between versions
briefly in the cover letter. Thanks!
--
Cheers,
David
^ permalink raw reply [flat|nested] 3+ messages in thread
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