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Re: [PATCH] sched/core: Clear the root_domain cpumasks in init_rootdomain()

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH] sched/core: Clear the root_domain cpumasks in init_rootdomain()
Date 2015-12-04 09:30 +0100
Message-ID <qBTUD-dS-11@gated-at.bofh.it> (permalink)
References (3 earlier) <qBis3-19N-29@gated-at.bofh.it> <qBs81-7iq-7@gated-at.bofh.it> <qBxr4-2rt-21@gated-at.bofh.it> <qBAIi-4rp-21@gated-at.bofh.it> <qBTBf-7g-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, Dec 04, 2015 at 09:09:01AM +0100, Ingo Molnar wrote:
> and then this code:
> 
> > >         cpumask_andnot(doms_cur[0], cpu_map, cpu_isolated_map);
> 
> uses it without first clearing it.
> 
> So is this another such bug, or am I missing something?

It uses it as destination, it does a complete write of the mask.
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Thread

[PATCH] sched/core: Clear the root_domain cpumasks in init_rootdomain() Xunlei Pang <xlpang@redhat.com> - 2015-12-02 13:00 +0100
  Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Peter Zijlstra <peterz@infradead.org> - 2015-12-02 13:40 +0100
    Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Xunlei Pang <xlpang@redhat.com> - 2015-12-02 14:20 +0100
      Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Peter Zijlstra <peterz@infradead.org> - 2015-12-02 17:30 +0100
        Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Xunlei Pang <xlpang@redhat.com> - 2015-12-03 03:50 +0100
          Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Ingo Molnar <mingo@kernel.org> - 2015-12-03 09:30 +0100
            Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Xunlei Pang <xlpang@redhat.com> - 2015-12-03 13:00 +0100
              Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Ingo Molnar <mingo@kernel.org> - 2015-12-04 09:10 +0100
                Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Peter Zijlstra <peterz@infradead.org> - 2015-12-04 09:30 +0100
                Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Ingo Molnar <mingo@kernel.org> - 2015-12-04 09:40 +0100
                Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Xunlei Pang <xlpang@redhat.com> - 2015-12-04 09:30 +0100
                Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Ingo Molnar <mingo@kernel.org> - 2015-12-04 09:40 +0100
          Re: [PATCH] sched/core: Clear the root_domain cpumasks in  init_rootdomain() Peter Zijlstra <peterz@infradead.org> - 2015-12-03 10:40 +0100
  [tip:locking/core] sched/core:   Clear the root_domain cpumasks in init_rootdomain() tip-bot for Xunlei Pang <tipbot@zytor.com> - 2015-12-04 13:00 +0100

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