From: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-mm@kvack.org, cgroups@vger.kernel.org,
Tejun Heo <tj@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
handai.szj@gmail.com, anton.vorontsov@linaro.org,
Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@suse.de>
Subject: Re: [PATCH v2 2/5] memcg: provide root figures from system totals
Date: Wed, 06 Mar 2013 19:59:49 +0900 [thread overview]
Message-ID: <513721A5.6080401@jp.fujitsu.com> (raw)
In-Reply-To: <51371FEF.3020507@parallels.com>
(2013/03/06 19:52), Glauber Costa wrote:
> On 03/06/2013 02:45 PM, Kamezawa Hiroyuki wrote:
>> (2013/03/06 17:30), Glauber Costa wrote:
>>> On 03/06/2013 04:27 AM, Kamezawa Hiroyuki wrote:
>>>> (2013/03/05 22:10), Glauber Costa wrote:
>>>>> + case _MEMSWAP: {
>>>>> + struct sysinfo i;
>>>>> + si_swapinfo(&i);
>>>>> +
>>>>> + return ((memcg_read_root_rss() +
>>>>> + atomic_long_read(&vm_stat[NR_FILE_PAGES])) << PAGE_SHIFT) +
>>>>> + i.totalswap - i.freeswap;
>>>>
>>>> How swapcache is handled ? ...and How kmem works with this calc ?
>>>>
>>> I am ignoring kmem, because we don't account kmem for the root cgroup
>>> anyway.
>>>
>>> Setting the limit is invalid, and we don't account until the limit is
>>> set. Then it will be 0, always.
>>>
>>> For swapcache, I am hoping that totalswap - freeswap will cover
>>> everything swap related. If you think I am wrong, please enlighten me.
>>>
>>
>> i.totalswap - i.freeswap = # of used swap entries.
>>
>> SwapCache can be rss and used swap entry at the same time.
>>
>
> Well, yes, but the rss entries would be accounted for in get_mm_rss(),
> won't they ?
>
> What am I missing ?
I think the correct caluculation is
Sum of all RSS + All file caches + (i.total_swap - i.freeswap - # of mapped SwapCache)
In the patch, mapped SwapCache is counted as both of rss and swap.
BTW, how about
Sum of all LRU + (i.total_swap - i.freeswap - # of all SwapCache)
?
Thanks,
-Kame
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next prev parent reply other threads:[~2013-03-06 11:00 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-05 13:10 [PATCH v2 0/5] bypass root memcg charges if no memcgs are possible Glauber Costa
2013-03-05 13:10 ` [PATCH v2 1/5] memcg: make nocpu_base available for non hotplug Glauber Costa
2013-03-06 0:04 ` Kamezawa Hiroyuki
2013-03-19 11:07 ` Michal Hocko
2013-03-05 13:10 ` [PATCH v2 2/5] memcg: provide root figures from system totals Glauber Costa
2013-03-06 0:27 ` Kamezawa Hiroyuki
2013-03-06 8:30 ` Glauber Costa
2013-03-06 10:45 ` Kamezawa Hiroyuki
2013-03-06 10:52 ` Glauber Costa
2013-03-06 10:59 ` Kamezawa Hiroyuki [this message]
2013-03-13 6:58 ` Sha Zhengju
2013-03-13 9:15 ` Kamezawa Hiroyuki
2013-03-13 9:59 ` Sha Zhengju
2013-03-14 0:03 ` Kamezawa Hiroyuki
2013-03-06 10:50 ` Kamezawa Hiroyuki
2013-03-19 12:46 ` Michal Hocko
2013-03-19 12:55 ` Michal Hocko
2013-03-20 7:03 ` Glauber Costa
2013-03-20 8:03 ` Michal Hocko
2013-03-20 8:08 ` Glauber Costa
2013-03-20 8:18 ` Michal Hocko
2013-03-20 8:34 ` Glauber Costa
2013-03-20 8:58 ` Michal Hocko
2013-03-20 9:30 ` Glauber Costa
2013-03-21 6:08 ` Kamezawa Hiroyuki
2013-03-20 16:40 ` Anton Vorontsov
2013-03-20 7:04 ` Glauber Costa
2013-03-05 13:10 ` [PATCH v2 3/5] memcg: make it suck faster Glauber Costa
2013-03-06 0:46 ` Kamezawa Hiroyuki
2013-03-06 8:38 ` Glauber Costa
2013-03-06 10:54 ` Kamezawa Hiroyuki
2013-03-13 8:08 ` Sha Zhengju
2013-03-20 7:13 ` Glauber Costa
2013-03-19 13:58 ` Michal Hocko
2013-03-20 7:00 ` Glauber Costa
2013-03-20 8:13 ` Michal Hocko
2013-03-05 13:10 ` [PATCH v2 4/5] memcg: do not call page_cgroup_init at system_boot Glauber Costa
2013-03-06 1:07 ` Kamezawa Hiroyuki
2013-03-06 8:22 ` Glauber Costa
2013-03-19 14:06 ` Michal Hocko
2013-03-05 13:10 ` [PATCH v2 5/5] memcg: do not walk all the way to the root for memcg Glauber Costa
2013-03-06 1:08 ` Kamezawa Hiroyuki
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