From: Balbir Singh <balbir-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
To: Dave Hansen <haveblue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux MM Mailing List
<linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Linux Containers
<containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Paul Menage <menage-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: Re: [-mm PATCH] Memory controller improve user interface
Date: Thu, 30 Aug 2007 03:34:12 +0530 [thread overview]
Message-ID: <46D5ED5C.9030405@linux.vnet.ibm.com> (raw)
In-Reply-To: <1188413148.28903.113.camel@localhost>
Dave Hansen wrote:
> On Wed, 2007-08-29 at 16:40 +0530, Balbir Singh wrote:
>>
>> @@ -352,7 +353,7 @@ int mem_container_charge(struct page *pa
>> kfree(pc);
>> pc = race_pc;
>> atomic_inc(&pc->ref_cnt);
>> - res_counter_uncharge(&mem->res, 1);
>> + res_counter_uncharge(&mem->res, MEM_CONTAINER_CHARGE_KB);
>> css_put(&mem->css);
>> goto done;
>> }
>
> Do these changes really need to happen anywhere besides the
> user<->kernel boundary? Why can't internal tracking be in pages?
I've thought about this before. The problem is that a user could
set his limit to 10000 bytes, but would then see the usage and
limit round to the closest page boundary. This can be confusing
to a user.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux MM Mailing List <linux-mm@kvack.org>,
David Rientjes <rientjes@google.com>,
Linux Containers <containers@lists.osdl.org>,
Paul Menage <menage@google.com>
Subject: Re: [-mm PATCH] Memory controller improve user interface
Date: Thu, 30 Aug 2007 03:34:12 +0530 [thread overview]
Message-ID: <46D5ED5C.9030405@linux.vnet.ibm.com> (raw)
In-Reply-To: <1188413148.28903.113.camel@localhost>
Dave Hansen wrote:
> On Wed, 2007-08-29 at 16:40 +0530, Balbir Singh wrote:
>>
>> @@ -352,7 +353,7 @@ int mem_container_charge(struct page *pa
>> kfree(pc);
>> pc = race_pc;
>> atomic_inc(&pc->ref_cnt);
>> - res_counter_uncharge(&mem->res, 1);
>> + res_counter_uncharge(&mem->res, MEM_CONTAINER_CHARGE_KB);
>> css_put(&mem->css);
>> goto done;
>> }
>
> Do these changes really need to happen anywhere besides the
> user<->kernel boundary? Why can't internal tracking be in pages?
I've thought about this before. The problem is that a user could
set his limit to 10000 bytes, but would then see the usage and
limit round to the closest page boundary. This can be confusing
to a user.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux MM Mailing List <linux-mm@kvack.org>,
David Rientjes <rientjes@google.com>,
Linux Containers <containers@lists.osdl.org>,
Paul Menage <menage@google.com>
Subject: Re: [-mm PATCH] Memory controller improve user interface
Date: Thu, 30 Aug 2007 03:34:12 +0530 [thread overview]
Message-ID: <46D5ED5C.9030405@linux.vnet.ibm.com> (raw)
In-Reply-To: <1188413148.28903.113.camel@localhost>
Dave Hansen wrote:
> On Wed, 2007-08-29 at 16:40 +0530, Balbir Singh wrote:
>>
>> @@ -352,7 +353,7 @@ int mem_container_charge(struct page *pa
>> kfree(pc);
>> pc = race_pc;
>> atomic_inc(&pc->ref_cnt);
>> - res_counter_uncharge(&mem->res, 1);
>> + res_counter_uncharge(&mem->res, MEM_CONTAINER_CHARGE_KB);
>> css_put(&mem->css);
>> goto done;
>> }
>
> Do these changes really need to happen anywhere besides the
> user<->kernel boundary? Why can't internal tracking be in pages?
I've thought about this before. The problem is that a user could
set his limit to 10000 bytes, but would then see the usage and
limit round to the closest page boundary. This can be confusing
to a user.
--
Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
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next prev parent reply other threads:[~2007-08-29 22:04 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-29 11:10 [-mm PATCH] Memory controller improve user interface Balbir Singh
2007-08-29 11:10 ` Balbir Singh
2007-08-29 15:28 ` Paul Menage
2007-08-29 15:28 ` Paul Menage
2007-08-29 16:07 ` Balbir Singh
2007-08-29 16:07 ` Balbir Singh
2007-08-29 16:17 ` Paul Menage
2007-08-29 16:17 ` Paul Menage
2007-08-29 18:45 ` Dave Hansen
2007-08-29 18:45 ` Dave Hansen
2007-08-29 22:04 ` Balbir Singh [this message]
2007-08-29 22:04 ` Balbir Singh
2007-08-29 22:04 ` Balbir Singh
2007-08-29 22:18 ` Dave Hansen
2007-08-29 22:18 ` Dave Hansen
2007-08-29 22:20 ` Paul Menage
2007-08-29 22:20 ` Paul Menage
2007-08-29 22:25 ` Dave Hansen
2007-08-29 22:25 ` Dave Hansen
2007-08-29 22:37 ` Balbir Singh
2007-08-29 22:37 ` Balbir Singh
2007-08-29 22:37 ` Balbir Singh
2007-08-30 5:38 ` KAMEZAWA Hiroyuki
2007-08-30 5:38 ` KAMEZAWA Hiroyuki
[not found] ` <20070830143859.e9d3511a.kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2007-08-30 9:13 ` Balbir Singh
2007-08-30 9:13 ` Balbir Singh
2007-08-30 9:13 ` Balbir Singh
2007-08-29 22:27 ` Balbir Singh
2007-08-29 22:27 ` Balbir Singh
2007-08-29 22:36 ` Dave Hansen
2007-08-29 22:36 ` Dave Hansen
2007-08-29 22:44 ` Balbir Singh
2007-08-29 22:44 ` Balbir Singh
2007-08-29 22:44 ` Balbir Singh
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