Re: [PATCH v3 00/16] slab accounting for memcg

2012-09-24 Thread Glauber Costa
On 09/22/2012 12:46 AM, Tejun Heo wrote:
> Hello,
> 
> On Tue, Sep 18, 2012 at 06:11:54PM +0400, Glauber Costa wrote:
>> This is a followup to the previous kmem series. I divided them logically
>> so it gets easier for reviewers. But I believe they are ready to be merged
>> together (although we can do a two-pass merge if people would prefer)
>>
>> Throwaway git tree found at:
>>
>>  git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg.git 
>> kmemcg-slab
>>
>> There are mostly bugfixes since last submission.
>>
>> For a detailed explanation about this series, please refer to my previous 
>> post
>> (Subj: [PATCH v3 00/13] kmem controller for memcg.)
> 
> In general, things look good to me.  I think the basic approach is
> manageable and does a decent job of avoiding introducing complications
> on the usual code paths.
> 
> Pekka seems generally happy with the approach too.  Christoph, what do
> you think?
> 
> Thanks.
> 
I myself think that while the approach is okay, this would need one or
two more versions for us to sort out some issues that are still remaining.

I'd very much like to have the kmemcg-stack series seeing its way
forward first. Mel Gorman said he would try his best to review it his
week, and I don't plan to resubmit anything before that.

After that, I plan to rebase at least this one again.
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Re: [PATCH v3 00/16] slab accounting for memcg

2012-09-21 Thread Tejun Heo
On Fri, Sep 21, 2012 at 01:46:19PM -0700, Tejun Heo wrote:
> In general, things look good to me.  I think the basic approach is
> manageable and does a decent job of avoiding introducing complications
> on the usual code paths.
> 
> Pekka seems generally happy with the approach too.  Christoph, what do
> you think?

Ooh, also, why aren't Andrew and Michal not cc'd?

-- 
tejun
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Re: [PATCH v3 00/16] slab accounting for memcg

2012-09-21 Thread Tejun Heo
Hello,

On Tue, Sep 18, 2012 at 06:11:54PM +0400, Glauber Costa wrote:
> This is a followup to the previous kmem series. I divided them logically
> so it gets easier for reviewers. But I believe they are ready to be merged
> together (although we can do a two-pass merge if people would prefer)
> 
> Throwaway git tree found at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg.git 
> kmemcg-slab
> 
> There are mostly bugfixes since last submission.
> 
> For a detailed explanation about this series, please refer to my previous post
> (Subj: [PATCH v3 00/13] kmem controller for memcg.)

In general, things look good to me.  I think the basic approach is
manageable and does a decent job of avoiding introducing complications
on the usual code paths.

Pekka seems generally happy with the approach too.  Christoph, what do
you think?

Thanks.

-- 
tejun
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Re: [PATCH v3 00/16] slab accounting for memcg

2012-09-21 Thread Glauber Costa
On 09/21/2012 01:40 PM, Pekka Enberg wrote:
> Hi Glauber,
> 
> On Tue, Sep 18, 2012 at 5:11 PM, Glauber Costa  wrote:
>> This is a followup to the previous kmem series. I divided them logically
>> so it gets easier for reviewers. But I believe they are ready to be merged
>> together (although we can do a two-pass merge if people would prefer)
>>
>> Throwaway git tree found at:
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg.git 
>> kmemcg-slab
>>
>> There are mostly bugfixes since last submission.
> 
> Overall, I like this series a lot. However, I don't really see this as a
> v3.7 material because we already have largeish pending updates to the
> slab allocators. I also haven't seen any performance numbers for this
> which is a problem.
> 
> So what I'd really like to see is this series being merged early in the
> v3.8 development cycle to maximize the number of people eyeballing the
> code and looking at performance impact.
> 
> Does this sound reasonable to you Glauber?

Absolutely.

As I've stated before, I actually believe the kmemcg-stack and
kmemcg-slab (this one) portions should be merged separately. (So we can
sort out issues more easily, and point to the right place)

The first one is a lot more stable and got a lot more love. The goal of
this one is to get it reviewed so we can merge as soon as we can - but
not sooner.

early v3.8 sounds perfect to me.
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Re: [PATCH v3 00/16] slab accounting for memcg

2012-09-21 Thread Pekka Enberg
Hi Glauber,

On Tue, Sep 18, 2012 at 5:11 PM, Glauber Costa  wrote:
> This is a followup to the previous kmem series. I divided them logically
> so it gets easier for reviewers. But I believe they are ready to be merged
> together (although we can do a two-pass merge if people would prefer)
>
> Throwaway git tree found at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/glommer/memcg.git 
> kmemcg-slab
>
> There are mostly bugfixes since last submission.

Overall, I like this series a lot. However, I don't really see this as a
v3.7 material because we already have largeish pending updates to the
slab allocators. I also haven't seen any performance numbers for this
which is a problem.

So what I'd really like to see is this series being merged early in the
v3.8 development cycle to maximize the number of people eyeballing the
code and looking at performance impact.

Does this sound reasonable to you Glauber?

Pekka
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