* [PATCH 8/8] doc: update Documentation/sysctl/vm.txt
@ 2014-06-16 9:25 Xishi Qiu
2014-06-16 16:57 ` Randy Dunlap
0 siblings, 1 reply; 3+ messages in thread
From: Xishi Qiu @ 2014-06-16 9:25 UTC (permalink / raw)
To: Andrew Morton, Wanpeng Li, Greg Kroah-Hartman, aquini,
Peter Zijlstra, Rik van Riel, Johannes Weiner, Michal Hocko
Cc: Linux MM, LKML, Xishi Qiu, Li Zefan
Update the doc.
Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
---
Documentation/sysctl/vm.txt | 43 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index dd9d0e3..8008e53 100644
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -20,6 +20,10 @@ Currently, these files are in /proc/sys/vm:
- admin_reserve_kbytes
- block_dump
+- cache_limit_mbytes
+- cache_limit_ratio
+- cache_reclaim_s
+- cache_reclaim_weight
- compact_memory
- dirty_background_bytes
- dirty_background_ratio
@@ -97,6 +101,45 @@ information on block I/O debugging is in Documentation/laptops/laptop-mode.txt.
==============================================================
+cache_limit_mbytes
+
+This is used to limit page cache amount. The input unit is MB, value range
+is from 0 to totalram_pages. If this is set to 0, it will not limit page cache.
+When written to the file, cache_limit_ratio will be updated too.
+
+The default value is 0.
+
+==============================================================
+
+cache_limit_ratio
+
+This is used to limit page cache amount. The input unit is percent, value
+range is from 0 to 100. If this is set to 0, it will not limit page cache.
+When written to the file, cache_limit_mbytes will be updated too.
+
+The default value is 0.
+
+==============================================================
+
+cache_reclaim_s
+
+This is used to reclaim page cache in circles. The input unit is second,
+the minimum value is 0. If this is set to 0, it will disable the feature.
+
+The default value is 0.
+
+==============================================================
+
+cache_reclaim_weight
+
+This is used to speed up page cache reclaim. It depend on enabling
+cache_limit_mbytes/cache_limit_ratio or cache_reclaim_s. Value range is
+from 1(slow) to 100(fast).
+
+The default value is 1.
+
+==============================================================
+
compact_memory
Available only when CONFIG_COMPACTION is set. When 1 is written to the file,
--
1.6.0.2
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH 8/8] doc: update Documentation/sysctl/vm.txt
2014-06-16 9:25 [PATCH 8/8] doc: update Documentation/sysctl/vm.txt Xishi Qiu
@ 2014-06-16 16:57 ` Randy Dunlap
2014-06-17 1:20 ` Xishi Qiu
0 siblings, 1 reply; 3+ messages in thread
From: Randy Dunlap @ 2014-06-16 16:57 UTC (permalink / raw)
To: Xishi Qiu, Andrew Morton, Wanpeng Li, Greg Kroah-Hartman, aquini,
Peter Zijlstra, Rik van Riel, Johannes Weiner, Michal Hocko
Cc: Linux MM, LKML, Li Zefan
On 06/16/14 02:25, Xishi Qiu wrote:
> Update the doc.
>
> Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
> ---
> Documentation/sysctl/vm.txt | 43 +++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 43 insertions(+), 0 deletions(-)
>
> diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
> index dd9d0e3..8008e53 100644
> --- a/Documentation/sysctl/vm.txt
> +++ b/Documentation/sysctl/vm.txt
> @@ -20,6 +20,10 @@ Currently, these files are in /proc/sys/vm:
>
> - admin_reserve_kbytes
> - block_dump
> +- cache_limit_mbytes
> +- cache_limit_ratio
> +- cache_reclaim_s
> +- cache_reclaim_weight
> - compact_memory
> - dirty_background_bytes
> - dirty_background_ratio
> @@ -97,6 +101,45 @@ information on block I/O debugging is in Documentation/laptops/laptop-mode.txt.
>
> ==============================================================
>
> +cache_limit_mbytes
> +
> +This is used to limit page cache amount. The input unit is MB, value range
> +is from 0 to totalram_pages. If this is set to 0, it will not limit page cache.
Where does one find the value of totalram_pages?
Is totalram_pages in MB or does totalram_pages need to be divided by some value
to convert it to MB?
> +When written to the file, cache_limit_ratio will be updated too.
> +
> +The default value is 0.
> +
> +==============================================================
> +
> +cache_limit_ratio
> +
> +This is used to limit page cache amount. The input unit is percent, value
> +range is from 0 to 100. If this is set to 0, it will not limit page cache.
> +When written to the file, cache_limit_mbytes will be updated too.
> +
> +The default value is 0.
> +
> +==============================================================
> +
> +cache_reclaim_s
> +
> +This is used to reclaim page cache in circles. The input unit is second,
> +the minimum value is 0. If this is set to 0, it will disable the feature.
> +
> +The default value is 0.
> +
> +==============================================================
> +
> +cache_reclaim_weight
> +
> +This is used to speed up page cache reclaim. It depend on enabling
depends on
> +cache_limit_mbytes/cache_limit_ratio or cache_reclaim_s. Value range is
> +from 1(slow) to 100(fast).
> +
> +The default value is 1.
> +
> +==============================================================
> +
> compact_memory
>
> Available only when CONFIG_COMPACTION is set. When 1 is written to the file,
>
--
~Randy
--
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH 8/8] doc: update Documentation/sysctl/vm.txt
2014-06-16 16:57 ` Randy Dunlap
@ 2014-06-17 1:20 ` Xishi Qiu
0 siblings, 0 replies; 3+ messages in thread
From: Xishi Qiu @ 2014-06-17 1:20 UTC (permalink / raw)
To: Randy Dunlap
Cc: Andrew Morton, Wanpeng Li, Greg Kroah-Hartman, aquini,
Peter Zijlstra, Rik van Riel, Johannes Weiner, Michal Hocko,
Linux MM, LKML, Li Zefan
On 2014/6/17 0:57, Randy Dunlap wrote:
> On 06/16/14 02:25, Xishi Qiu wrote:
>> Update the doc.
>>
>> Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
>> ---
>> Documentation/sysctl/vm.txt | 43 +++++++++++++++++++++++++++++++++++++++++++
>> 1 files changed, 43 insertions(+), 0 deletions(-)
>>
>> diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
>> index dd9d0e3..8008e53 100644
>> --- a/Documentation/sysctl/vm.txt
>> +++ b/Documentation/sysctl/vm.txt
>> @@ -20,6 +20,10 @@ Currently, these files are in /proc/sys/vm:
>>
>> - admin_reserve_kbytes
>> - block_dump
>> +- cache_limit_mbytes
>> +- cache_limit_ratio
>> +- cache_reclaim_s
>> +- cache_reclaim_weight
>> - compact_memory
>> - dirty_background_bytes
>> - dirty_background_ratio
>> @@ -97,6 +101,45 @@ information on block I/O debugging is in Documentation/laptops/laptop-mode.txt.
>>
>> ==============================================================
>>
>> +cache_limit_mbytes
>> +
>> +This is used to limit page cache amount. The input unit is MB, value range
>> +is from 0 to totalram_pages. If this is set to 0, it will not limit page cache.
>
> Where does one find the value of totalram_pages?
>
"cat /proc/meminfo | grep MemTotal" or "free -m"
> Is totalram_pages in MB or does totalram_pages need to be divided by some value
> to convert it to MB?
>
Yes, should convert it to MB.
Thanks,
Xishi Qiu
>> +When written to the file, cache_limit_ratio will be updated too.
>> +
>> +The default value is 0.
>> +
>> +==============================================================
>> +
>> +cache_limit_ratio
>> +
>> +This is used to limit page cache amount. The input unit is percent, value
>> +range is from 0 to 100. If this is set to 0, it will not limit page cache.
>> +When written to the file, cache_limit_mbytes will be updated too.
>> +
>> +The default value is 0.
>> +
>> +==============================================================
>> +
>> +cache_reclaim_s
>> +
>> +This is used to reclaim page cache in circles. The input unit is second,
>> +the minimum value is 0. If this is set to 0, it will disable the feature.
>> +
>> +The default value is 0.
>> +
>> +==============================================================
>> +
>> +cache_reclaim_weight
>> +
>> +This is used to speed up page cache reclaim. It depend on enabling
>
> depends on
>
>> +cache_limit_mbytes/cache_limit_ratio or cache_reclaim_s. Value range is
>> +from 1(slow) to 100(fast).
>> +
>> +The default value is 1.
>> +
>> +==============================================================
>> +
>> compact_memory
>>
>> Available only when CONFIG_COMPACTION is set. When 1 is written to the file,
>>
>
>
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2014-06-16 9:25 [PATCH 8/8] doc: update Documentation/sysctl/vm.txt Xishi Qiu
2014-06-16 16:57 ` Randy Dunlap
2014-06-17 1:20 ` Xishi Qiu
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