linux-kernel - Re: [PATCH v10 2/8] hugetlb_cgroup: add interface for charge/uncharge hugetlb reservations

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Message-ID: <7e1d2c5f-3b07-4d16-9e1b-bd89d25e7fb3@oracle.com>
Date:   Fri, 17 Jan 2020 11:26:24 -0800
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Mina Almasry <almasrymina@...gle.com>, rientjes@...gle.com,
        shakeelb@...gle.com
Cc:     shuah@...nel.org, gthelen@...gle.com, akpm@...ux-foundation.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, cgroups@...r.kernel.org,
        aneesh.kumar@...ux.vnet.ibm.com
Subject: Re: [PATCH v10 2/8] hugetlb_cgroup: add interface for charge/uncharge
 hugetlb reservations

On 1/14/20 5:26 PM, Mina Almasry wrote:
> Augments hugetlb_cgroup_charge_cgroup to be able to charge hugetlb
> usage or hugetlb reservation counter.
> 
> Adds a new interface to uncharge a hugetlb_cgroup counter via
> hugetlb_cgroup_uncharge_counter.
> 
> Integrates the counter with hugetlb_cgroup, via hugetlb_cgroup_init,
> hugetlb_cgroup_have_usage, and hugetlb_cgroup_css_offline.
> 
> Signed-off-by: Mina Almasry <almasrymina@...gle.com>
> 
> ---
> 
> Changes in v10:
> - Added missing VM_BUG_ON

Thanks for addressing my comments.
I see that patch 8 was updated to address David's comments.  I will also
review patch 8 later.

I am again requesting that someone with more cgroup experience comment on
this patch.  I do not have enough experience to determine if the code to
not reparent/zombie cgroup is correct.

For now,
Acked-by: Mike Kravetz <mike.kravetz@...cle.com>
while waiting for cgroup comments.

-- 
Mike Kravetz