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02 Apr 2024 08:42:57 -0700 Message-ID: <18e84d04-0b75-4188-a94d-6b033f4edbf0@intel.com> Date: Tue, 2 Apr 2024 08:42:56 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 15/15] selftests/sgx: Add scripts for EPC cgroup testing To: Jarkko Sakkinen , Haitao Huang , dave.hansen@linux.intel.com, tj@kernel.org, mkoutny@suse.com, linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org, x86@kernel.org, cgroups@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, sohil.mehta@intel.com, tim.c.chen@linux.intel.com Cc: zhiquan1.li@intel.com, kristen@linux.intel.com, seanjc@google.com, zhanb@microsoft.com, anakrish@microsoft.com, mikko.ylinen@linux.intel.com, yangjie@microsoft.com, chrisyan@microsoft.com References: <20240205210638.157741-1-haitao.huang@linux.intel.com> <20240205210638.157741-16-haitao.huang@linux.intel.com> <4be7b291010973c203ed8c7bcd25b626c1290231.camel@kernel.org> Content-Language: en-US From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 3/30/24 04:23, Jarkko Sakkinen wrote: >>> I also wonder is cgroup-tools dependency absolutely required or could >>> you just have a function that would interact with sysfs? >> I should have checked email before hit the send button for v10 ????. >> >> It'd be more complicated and less readable to do all the stuff without the >> cgroup-tools, esp cgexec. I checked dependency, cgroup-tools only depends >> on libc so I hope this would not cause too much inconvenience. > As per cgroup-tools, please prove this. It makes the job for more > complicated *for you* and you are making the job more complicated > to every possible person in the planet running any kernel QA. I don't see any other use of cgroup-tools in testing/selftests. I *DO* see a ton of /bin/bash use though. I wouldn't go to much trouble to make the thing ash-compatible. That said, the most important thing is to get some selftests in place. If using cgroup-tools means we get actual, runnable tests in place, that's a heck of a lot more important than making them perfect. Remember, almost nobody uses SGX. It's available on *VERY* few systems from one CPU vendor and only in very specific hardware configurations.