* [PATCH v2] mm/damon/core: remove unnecessary si_meminfo invoke.
@ 2023-09-19 2:00 Huan Yang
2023-09-19 15:38 ` SeongJae Park
0 siblings, 1 reply; 5+ messages in thread
From: Huan Yang @ 2023-09-19 2:00 UTC (permalink / raw)
To: SeongJae Park, Andrew Morton, open list:DATA ACCESS MONITOR,
open list:DATA ACCESS MONITOR, open list
Cc: opensource.kernel, Huan Yang
si_meminfo() will read and assign more info not just free/ram pages.
For just DAMOS_WMARK_FREE_MEM_RATE use, only get free and ram pages
is ok to save cpu.
Change from v1:
v1 fold free mem rate logic into __damos_get_wmark_free_mem_rate and not
invoke si_meminfo, just get free/ram_pages in global.
v2 cancel this __damos_get_wmark_free_mem_rate and just calculate rate
in damos_wmark_metric_value to keep it simple.
Signed-off-by: Huan Yang <link@vivo.com>
---
mm/damon/core.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/mm/damon/core.c b/mm/damon/core.c
index bcd2bd9d6c10..a3f812d78267 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1280,12 +1280,9 @@ static bool kdamond_need_stop(struct damon_ctx *ctx)
static unsigned long damos_wmark_metric_value(enum damos_wmark_metric metric)
{
- struct sysinfo i;
-
switch (metric) {
case DAMOS_WMARK_FREE_MEM_RATE:
- si_meminfo(&i);
- return i.freeram * 1000 / i.totalram;
+ return global_zone_page_state(NR_FREE_PAGES) * 1000 / totalram_pages();
default:
break;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v2] mm/damon/core: remove unnecessary si_meminfo invoke.
2023-09-19 2:00 [PATCH v2] mm/damon/core: remove unnecessary si_meminfo invoke Huan Yang
@ 2023-09-19 15:38 ` SeongJae Park
2023-09-20 1:46 ` 杨欢
0 siblings, 1 reply; 5+ messages in thread
From: SeongJae Park @ 2023-09-19 15:38 UTC (permalink / raw)
To: Huan Yang
Cc: SeongJae Park, Andrew Morton, open list:DATA ACCESS MONITOR,
open list:DATA ACCESS MONITOR, open list, opensource.kernel
Hi Huan,
On Tue, 19 Sep 2023 10:00:57 +0800 Huan Yang <link@vivo.com> wrote:
> si_meminfo() will read and assign more info not just free/ram pages.
> For just DAMOS_WMARK_FREE_MEM_RATE use, only get free and ram pages
> is ok to save cpu.
>
> Change from v1:
> v1 fold free mem rate logic into __damos_get_wmark_free_mem_rate and not
> invoke si_meminfo, just get free/ram_pages in global.
> v2 cancel this __damos_get_wmark_free_mem_rate and just calculate rate
> in damos_wmark_metric_value to keep it simple.
Thank you for accepting my suggestion and making this change. Nevertheless, we
usually not keep patch changelogs on commit message but after the '---'
line[1].
>
> Signed-off-by: Huan Yang <link@vivo.com>
Other than above and below trivial comments,
Reviewed-by: SeongJae Park <sj@kernel.org>
> ---
This is usual place for patch changelogs.
> mm/damon/core.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/mm/damon/core.c b/mm/damon/core.c
> index bcd2bd9d6c10..a3f812d78267 100644
> --- a/mm/damon/core.c
> +++ b/mm/damon/core.c
> @@ -1280,12 +1280,9 @@ static bool kdamond_need_stop(struct damon_ctx *ctx)
>
> static unsigned long damos_wmark_metric_value(enum damos_wmark_metric metric)
> {
> - struct sysinfo i;
> -
> switch (metric) {
> case DAMOS_WMARK_FREE_MEM_RATE:
> - si_meminfo(&i);
> - return i.freeram * 1000 / i.totalram;
> + return global_zone_page_state(NR_FREE_PAGES) * 1000 / totalram_pages();
DAMON code still prefer 80 columns limit[2] (sorry for being stubborn). Could
you please break this line for that?
> default:
> break;
> }
> --
> 2.34.1
>
[1] https://docs.kernel.org/process/submitting-patches.html#the-canonical-patch-format
[2] https://docs.kernel.org/process/coding-style.html#indentation
Thanks,
SJ
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2] mm/damon/core: remove unnecessary si_meminfo invoke.
2023-09-19 15:38 ` SeongJae Park
@ 2023-09-20 1:46 ` 杨欢
2023-09-20 1:57 ` [PATCH v3] " Huan Yang
0 siblings, 1 reply; 5+ messages in thread
From: 杨欢 @ 2023-09-20 1:46 UTC (permalink / raw)
To: SeongJae Park, 杨欢
Cc: Andrew Morton, open list:DATA ACCESS MONITOR,
open list:DATA ACCESS MONITOR, open list, opensource.kernel
在 2023/9/19 23:38, SeongJae Park 写道:
> [Some people who received this message don't often get email from sj@kernel.org. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
>
> Hi Huan,
>
> On Tue, 19 Sep 2023 10:00:57 +0800 Huan Yang <link@vivo.com> wrote:
>
>> si_meminfo() will read and assign more info not just free/ram pages.
>> For just DAMOS_WMARK_FREE_MEM_RATE use, only get free and ram pages
>> is ok to save cpu.
>>
>> Change from v1:
>> v1 fold free mem rate logic into __damos_get_wmark_free_mem_rate and not
>> invoke si_meminfo, just get free/ram_pages in global.
>> v2 cancel this __damos_get_wmark_free_mem_rate and just calculate rate
>> in damos_wmark_metric_value to keep it simple.
> Thank you for accepting my suggestion and making this change. Nevertheless, we
> usually not keep patch changelogs on commit message but after the '---'
> line[1].
>
>> Signed-off-by: Huan Yang <link@vivo.com>
> Other than above and below trivial comments,
>
> Reviewed-by: SeongJae Park <sj@kernel.org>
>
>> ---
> This is usual place for patch changelogs.
Hi SJ, OK, I'll change this.
>
>
>> mm/damon/core.c | 5 +----
>> 1 file changed, 1 insertion(+), 4 deletions(-)
>>
>> diff --git a/mm/damon/core.c b/mm/damon/core.c
>> index bcd2bd9d6c10..a3f812d78267 100644
>> --- a/mm/damon/core.c
>> +++ b/mm/damon/core.c
>> @@ -1280,12 +1280,9 @@ static bool kdamond_need_stop(struct damon_ctx *ctx)
>>
>> static unsigned long damos_wmark_metric_value(enum damos_wmark_metric metric)
>> {
>> - struct sysinfo i;
>> -
>> switch (metric) {
>> case DAMOS_WMARK_FREE_MEM_RATE:
>> - si_meminfo(&i);
>> - return i.freeram * 1000 / i.totalram;
>> + return global_zone_page_state(NR_FREE_PAGES) * 1000 / totalram_pages();
> DAMON code still prefer 80 columns limit[2] (sorry for being stubborn). Could
> you please break this line for that?
Sorry for break format rule, I'll change it.
>
>> default:
>> break;
>> }
>> --
>> 2.34.1
>>
> [1] https://docs.kernel.org/process/submitting-patches.html#the-canonical-patch-format
> [2] https://docs.kernel.org/process/coding-style.html#indentation
>
> Thanks,
> SJ
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v3] mm/damon/core: remove unnecessary si_meminfo invoke.
2023-09-20 1:46 ` 杨欢
@ 2023-09-20 1:57 ` Huan Yang
2023-09-20 7:19 ` SeongJae Park
0 siblings, 1 reply; 5+ messages in thread
From: Huan Yang @ 2023-09-20 1:57 UTC (permalink / raw)
To: SeongJae Park, Andrew Morton, damon, linux-mm, linux-kernel
Cc: opensource.kernel, Huan Yang
si_meminfo() will read and assign more info not just free/ram pages.
For just DAMOS_WMARK_FREE_MEM_RATE use, only get free and ram pages
is ok to save cpu.
Signed-off-by: Huan Yang <link@vivo.com>
---
Change from v1:
v1 fold free mem rate logic into __damos_get_wmark_free_mem_rate and not
invoke si_meminfo, just get free/ram_pages in global.
v2 cancel this __damos_get_wmark_free_mem_rate and just calculate rate
in damos_wmark_metric_value to keep it simple.
v3 fix changelog format, fix code style.
mm/damon/core.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/mm/damon/core.c b/mm/damon/core.c
index bcd2bd9d6c10..6ceb52298904 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1280,12 +1280,10 @@ static bool kdamond_need_stop(struct damon_ctx *ctx)
static unsigned long damos_wmark_metric_value(enum damos_wmark_metric metric)
{
- struct sysinfo i;
-
switch (metric) {
case DAMOS_WMARK_FREE_MEM_RATE:
- si_meminfo(&i);
- return i.freeram * 1000 / i.totalram;
+ return global_zone_page_state(NR_FREE_PAGES) * 1000 /
+ totalram_pages();
default:
break;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v3] mm/damon/core: remove unnecessary si_meminfo invoke.
2023-09-20 1:57 ` [PATCH v3] " Huan Yang
@ 2023-09-20 7:19 ` SeongJae Park
0 siblings, 0 replies; 5+ messages in thread
From: SeongJae Park @ 2023-09-20 7:19 UTC (permalink / raw)
To: Huan Yang
Cc: SeongJae Park, Andrew Morton, damon, linux-mm, linux-kernel,
opensource.kernel
Hi Huan,
On Wed, 20 Sep 2023 09:57:27 +0800 Huan Yang <link@vivo.com> wrote:
> si_meminfo() will read and assign more info not just free/ram pages.
> For just DAMOS_WMARK_FREE_MEM_RATE use, only get free and ram pages
> is ok to save cpu.
>
> Signed-off-by: Huan Yang <link@vivo.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Thanks,
SJ
> ---
> Change from v1:
> v1 fold free mem rate logic into __damos_get_wmark_free_mem_rate and not
> invoke si_meminfo, just get free/ram_pages in global.
> v2 cancel this __damos_get_wmark_free_mem_rate and just calculate rate
> in damos_wmark_metric_value to keep it simple.
> v3 fix changelog format, fix code style.
>
>
> mm/damon/core.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/mm/damon/core.c b/mm/damon/core.c
> index bcd2bd9d6c10..6ceb52298904 100644
> --- a/mm/damon/core.c
> +++ b/mm/damon/core.c
> @@ -1280,12 +1280,10 @@ static bool kdamond_need_stop(struct damon_ctx *ctx)
>
> static unsigned long damos_wmark_metric_value(enum damos_wmark_metric metric)
> {
> - struct sysinfo i;
> -
> switch (metric) {
> case DAMOS_WMARK_FREE_MEM_RATE:
> - si_meminfo(&i);
> - return i.freeram * 1000 / i.totalram;
> + return global_zone_page_state(NR_FREE_PAGES) * 1000 /
> + totalram_pages();
> default:
> break;
> }
> --
> 2.34.1
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-09-20 7:19 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2023-09-19 2:00 [PATCH v2] mm/damon/core: remove unnecessary si_meminfo invoke Huan Yang
2023-09-19 15:38 ` SeongJae Park
2023-09-20 1:46 ` 杨欢
2023-09-20 1:57 ` [PATCH v3] " Huan Yang
2023-09-20 7:19 ` SeongJae Park
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