linux-kernel - Re: [PATCH v12 14/14] selftests/sgx: Add scripts for EPC cgroup testing

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Date: Mon, 29 Apr 2024 12:14:31 -0500
From: "Haitao Huang" <haitao.huang@...ux.intel.com>
To: "Dave Hansen" <dave.hansen@...el.com>, "Huang, Kai" <kai.huang@...el.com>,
 "hpa@...or.com" <hpa@...or.com>, "tim.c.chen@...ux.intel.com"
 <tim.c.chen@...ux.intel.com>, "linux-sgx@...r.kernel.org"
 <linux-sgx@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org>,
 "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
 "cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "mkoutny@...e.com" <mkoutny@...e.com>, "tglx@...utronix.de"
 <tglx@...utronix.de>, "Mehta, Sohil" <sohil.mehta@...el.com>, "tj@...nel.org"
 <tj@...nel.org>, "mingo@...hat.com" <mingo@...hat.com>, "bp@...en8.de"
 <bp@...en8.de>, "Jarkko Sakkinen" <jarkko@...nel.org>
Cc: "mikko.ylinen@...ux.intel.com" <mikko.ylinen@...ux.intel.com>,
 "seanjc@...gle.com" <seanjc@...gle.com>, "anakrish@...rosoft.com"
 <anakrish@...rosoft.com>, "Zhang, Bo" <zhanb@...rosoft.com>,
 "kristen@...ux.intel.com" <kristen@...ux.intel.com>, "yangjie@...rosoft.com"
 <yangjie@...rosoft.com>, "Li, Zhiquan1" <zhiquan1.li@...el.com>,
 "chrisyan@...rosoft.com" <chrisyan@...rosoft.com>
Subject: Re: [PATCH v12 14/14] selftests/sgx: Add scripts for EPC cgroup
 testing

On Mon, 29 Apr 2024 11:43:05 -0500, Jarkko Sakkinen <jarkko@...nel.org>  
wrote:

> On Mon Apr 29, 2024 at 7:18 PM EEST, Haitao Huang wrote:
>> Hi Jarkko
>>
>> On Sun, 28 Apr 2024 17:03:17 -0500, Jarkko Sakkinen <jarkko@...nel.org>
>> wrote:
>>
>> > On Fri Apr 26, 2024 at 5:28 PM EEST, Dave Hansen wrote:
>> >> On 4/16/24 07:15, Jarkko Sakkinen wrote:
>> >> > On Tue Apr 16, 2024 at 8:42 AM EEST, Huang, Kai wrote:
>> >> > Yes, exactly. I'd take one week break and cycle the kselftest part
>> >> > internally a bit as I said my previous response. I'm sure that  
>> there
>> >> > is experise inside Intel how to implement it properly. I.e. take  
>> some
>> >> > time to find the right person, and wait as long as that person has  
>> a
>> >> > bit of bandwidth to go through the test and suggest modifications.
>> >>
>> >> Folks, I worry that this series is getting bogged down in the  
>> selftests.
>> >>  Yes, selftests are important.  But getting _some_ tests in the  
>> kernel
>> >> is substantially more important than getting perfect tests.
>> >>
>> >> I don't think Haitao needs to "cycle" this back inside Intel.
>> >
>> > The problem with the tests was that they are hard to run anything else
>> > than Ubuntu (and perhaps Debian). It is hopefully now taken care of.
>> > Selftests do not have to be perfect but at minimum they need to be
>> > runnable.
>> >
>> > I need ret-test the latest series because it is possible that I did  
>> not
>> > have right flags (I was travelling few days thus have not done it  
>> yet).
>> >
>> > BR, Jarkko
>> >
>>
>> Let me know if you want me to send v13 before testing or you can just  
>> use
>> the sgx_cg_upstream_v12_plus branch in my repo.
>>
>> Also thanks for the "Reviewed-by" tags for other patches. But I've not  
>> got
>> "Reviewed-by" from you for patches #8-12 (not sure I missed). Could you  
>> go
>> through those alsoe when you get chance?
>
> So, I compiled v12 branch. Was the only difference in selftests?
>
> I can just copy them to the device.
>
> BR, Jarkko
>
The only other functional change is using BUG_ON() when workqueue  
allocation fails in sgx_cgroup_init(). It should not affect testing  
results.

Thanks
Haitao