linux-kernel - Re: [PATCH-cgroup 3/4] cgroup/cpuset: Keep track of CPUs in isolated partitions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 25 Oct 2023 14:46:01 -0400
From:   Waiman Long <longman@...hat.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Shuah Khan <shuah@...nel.org>, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH-cgroup 3/4] cgroup/cpuset: Keep track of CPUs in isolated
 partitions


On 10/23/23 23:25, Tejun Heo wrote:
> Hello, Waiman.
>
> On Wed, Oct 18, 2023 at 02:24:00PM -0400, Waiman Long wrote:
>> If you mean saving the exclusion cpumask no matter who the caller is, we can
>> add another exclusion cpumask to save it and expose it to sysfs. This should
>> be done in the first workqueue patch, not as part of this patch. I expose
>> this isolated cpumask for testing purpose to be checked by the
>> test_cpuset_prs.sh script for correctness. As said, I can expose it without
>> cgroup_debug if you think the information is useful in general.
> I don't really care where the cpumask is in the source tree. I just want all
> the workqueue cpumasks presented to the userspace in a single place. Also, I
> think it makes sense to publish it to userspace in an easily accessible
> manner as what the eventual configuration ends up being can be confusing and
> the effect it has on the system subtle.

I have added 2 more read-only cpumask sysfs files in v2 to expose the 
information.

Cheers,
Longman