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SubjectRe: [PATCH V3 8/8] memcg: Document cgroup dirty/writeback memory statistics
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On Fri, Dec 28, 2012 at 9:10 AM, Kamezawa Hiroyuki
<kamezawa.hiroyu@jp.fujitsu.com> wrote:
> (2012/12/26 2:28), Sha Zhengju wrote:
>> From: Sha Zhengju <handai.szj@taobao.com>
>>
>> Signed-off-by: Sha Zhengju <handai.szj@taobao.com>
>
> I don't think your words are bad but it may be better to sync with meminfo's text.
>
>> ---
>> Documentation/cgroups/memory.txt | 2 ++
>> 1 file changed, 2 insertions(+)
>>
>> diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
>> index addb1f1..2828164 100644
>> --- a/Documentation/cgroups/memory.txt
>> +++ b/Documentation/cgroups/memory.txt
>> @@ -487,6 +487,8 @@ pgpgin - # of charging events to the memory cgroup. The charging
>> pgpgout - # of uncharging events to the memory cgroup. The uncharging
>> event happens each time a page is unaccounted from the cgroup.
>> swap - # of bytes of swap usage
>> +dirty - # of bytes of file cache that are not in sync with the disk copy.
>> +writeback - # of bytes of file/anon cache that are queued for syncing to disk.
>> inactive_anon - # of bytes of anonymous memory and swap cache memory on
>> LRU list.
>> active_anon - # of bytes of anonymous and swap cache memory on active
>>
>
> Documentation/filesystems/proc.txt
>
> Dirty: Memory which is waiting to get written back to the disk
> Writeback: Memory which is actively being written back to the disk
>
> even if others are not ;(
>


The words are actually revised by Fengguang before:
https://lkml.org/lkml/2012/7/7/49
It might be more accurate than previous one and I just follow his advise...


Thanks,
Sha


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