linux-kernel - Re: [PATCH v8 01/15] cgroup/misc: Add per resource callbacks for CSS events

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Date: Fri, 02 Feb 2024 10:34:29 -0600
From: "Haitao Huang" <haitao.huang@...ux.intel.com>
To: dave.hansen@...ux.intel.com, tj@...nel.org, mkoutny@...e.com,
 linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org, x86@...nel.org,
 cgroups@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 hpa@...or.com, sohil.mehta@...el.com, "Jarkko Sakkinen" <jarkko@...nel.org>
Cc: zhiquan1.li@...el.com, kristen@...ux.intel.com, seanjc@...gle.com,
 zhanb@...rosoft.com, anakrish@...rosoft.com, mikko.ylinen@...ux.intel.com,
 yangjie@...rosoft.com, chrisyan@...rosoft.com
Subject: Re: [PATCH v8 01/15] cgroup/misc: Add per resource callbacks for CSS
 events

On Thu, 01 Feb 2024 17:24:40 -0600, Jarkko Sakkinen <jarkko@...nel.org>  
wrote:

> On Tue Jan 30, 2024 at 4:09 AM EET, Haitao Huang wrote:
>> From: Kristen Carlson Accardi <kristen@...ux.intel.com>
>>
>> The misc cgroup controller (subsystem) currently does not perform
>> resource type specific action for Cgroups Subsystem State (CSS) events:
>> the 'css_alloc' event when a cgroup is created and the 'css_free' event
>> when a cgroup is destroyed.
>>
>> Define callbacks for those events and allow resource providers to
>> register the callbacks per resource type as needed. This will be
>> utilized later by the EPC misc cgroup support implemented in the SGX
>> driver.
>>
>> Signed-off-by: Kristen Carlson Accardi <kristen@...ux.intel.com>
>> Co-developed-by: Haitao Huang <haitao.huang@...ux.intel.com>
>> Signed-off-by: Haitao Huang <haitao.huang@...ux.intel.com>
>> ---
>> V8:
>> - Abstract out _misc_cg_res_free() and _misc_cg_res_alloc() (Jarkko)
>> V7:
>> - Make ops one per resource type and store them in array (Michal)
>> - Rename the ops struct to misc_res_ops, and enforce the constraints of  
>> required callback
>> functions (Jarkko)
>> - Moved addition of priv field to patch 4 where it was used first.  
>> (Jarkko)
>>
>> V6:
>> - Create ops struct for per resource callbacks (Jarkko)
>> - Drop max_write callback (Dave, Michal)
>> - Style fixes (Kai)
>
> This version looks nice and smooth:
>
> Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
>
> BR, Jarkko
>
Thanks Jarkko!

@tj, I had your Reviewed-by tags previously but dropped it due to some  
changes for refactoring suggested by other reviewers. Could you take a  
look at patches 1-2 for MiscController and confirm if I can have your  
Reviewed-by tags again?
Thanks

Haitao