Messages in this thread | | | Date | Wed, 1 Jul 2020 17:05:12 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 00/22] add support for Clang LTO |
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On Wed, Jul 01, 2020 at 07:06:54AM -0700, Paul E. McKenney wrote:
> The current state in the C++ committee is that marking variables > carrying dependencies is the way forward. This is of course not what > the Linux kernel community does, but it should not be hard to have a > -fall-variables-dependent or some such that causes all variables to be > treated as if they were marked. Though I was hoping for only pointers. > Are they -sure- that they -absolutely- need to carry dependencies > through integers???
What's 'need'? :-)
I'm thinking __ktime_get_fast_ns() is better off with a dependent load than it is with an extra smp_rmb().
Yes we can stick an smp_rmb() in there, but I don't like it. Like I wrote earlier, if I wanted a control dependency, I'd have written one.
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