Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t
Date	2016-03-31 11:30 +0200
Message-ID	<riH5p-2PS-33@gated-at.bofh.it> (permalink)
References	(4 earlier) <ri0Wu-69T-5@gated-at.bofh.it> <ri1zc-6Hc-17@gated-at.bofh.it> <ri1zc-6Hc-19@gated-at.bofh.it> <ri1zc-6Hc-15@gated-at.bofh.it> <riEKf-Xu-39@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Mar 31, 2016 at 08:54:19AM +0200, Ingo Molnar wrote:
> Sounds good to me! I also volunteer the x86 architecture to be the guinea pig to 
> convert thread_info::flags to atomic_t ;-) [*]

So I'm not sure we can do this one arch at a time; all the TIF
manipulators live in include/linux/thread_info.h and are shared across
all archs.

Another thing to look out for is that set_bit() uses LOCK BTS when the
bit is not a compile time constant, we do not have an atomic_*() version
of that. Now I'm not sure if this matters, we might never end up
triggering that code path for TIF flags.

Thread

[PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Frederic Weisbecker <fweisbec@gmail.com> - 2016-03-24 15:40 +0100
  [PATCH 1/3] atomic: Introduce atomic_fetch_or Frederic Weisbecker <fweisbec@gmail.com> - 2016-03-24 15:50 +0100
    [tip:core/urgent] locking/atomic: Introduce atomic_fetch_or() tip-bot for Frederic Weisbecker <tipbot@zytor.com> - 2016-03-29 12:40 +0200
  Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-25 09:50 +0100
    Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Frederic Weisbecker <fweisbec@gmail.com> - 2016-03-25 14:20 +0100
      Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-29 11:50 +0200
        Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Linus Torvalds <torvalds@linux-foundation.org> - 2016-03-29 14:30 +0200
          Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Frederic Weisbecker <fweisbec@gmail.com> - 2016-03-29 15:10 +0200
            Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-31 09:00 +0200
              Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Peter Zijlstra <peterz@infradead.org> - 2016-03-31 11:30 +0200
                Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-31 15:20 +0200
          Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-29 15:10 +0200
            Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-29 15:10 +0200
              Re: [PATCH 0/3] nohz: Convert tick dependency mask to atomic_t Ingo Molnar <mingo@kernel.org> - 2016-03-29 15:20 +0200

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