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Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number of running thread

From Andy Lutomirski <luto@amacapital.net>
Newsgroups linux.kernel
Subject Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number of running thread
Date 2016-04-07 18:50 +0200
Message-ID <rlli2-6NG-5@gated-at.bofh.it> (permalink)
References (7 earlier) <rle6R-1ww-1@gated-at.bofh.it> <rlfvY-2qa-1@gated-at.bofh.it> <rlfvY-2qa-15@gated-at.bofh.it> <rlgin-34z-19@gated-at.bofh.it> <rll8l-6JT-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Thu, Apr 7, 2016 at 9:39 AM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> Can anybody give a *coherent* and actual *real* reason why the kernel
> would ever care about anything else?

The rseq data structure, which is still being designed.

OTOH, that thing could be registered separately by userspace.

--Andy

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[RFC PATCH v6 0/5] Thread-local ABI system call (CPU number cache) Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 19:10 +0200
  [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 19:10 +0200
    Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-04-04 19:20 +0200
      Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 21:50 +0200
        Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 22:50 +0200
          Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-05 18:10 +0200
            Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-04-05 18:50 +0200
              Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-07 11:10 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-04-07 12:40 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-07 12:40 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-04-07 13:30 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-07 14:10 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-04-07 14:30 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-07 14:40 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-07 18:00 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-07 14:40 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-07 18:40 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Andy Lutomirski <luto@amacapital.net> - 2016-04-07 18:50 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-07 19:00 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-07 19:00 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Linus Torvalds <torvalds@linux-foundation.org> - 2016-04-07 19:00 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-07 20:50 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Andi Kleen <andi@firstfloor.org> - 2016-04-07 22:30 +0200
                Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU  number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-07 23:00 +0200
    Re: [RFC PATCH v6 1/5] Thread-local ABI system call: cache CPU number  of running thread Florian Weimer <fweimer@redhat.com> - 2016-04-07 12:50 +0200
  [RFC PATCH v6 5/5] Thread-local ABI: wire up x86 32/64 system call Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 19:10 +0200
  [RFC PATCH v6 3/5] Thread-local ABI: wire up ARM system call Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 19:10 +0200
  [RFC PATCH v6 4/5] Thread-local ABI cpu_id: x86 32/64 resume notifier Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-04-04 19:10 +0200

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