Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures

On Thu, 16 Aug 2007, Paul Mackerras wrote:

> Herbert Xu writes:
> 
> > It doesn't matter.  The memory pressure flag is an *advisory*
> > flag.  If we get it wrong the worst that'll happen is that we'd
> > waste some time doing work that'll be thrown away.
> 
> Ah, so it's the "racy but I don't care because it's only an
> optimization" case.  That's fine.  Somehow I find it hard to believe
> that all the racy uses of atomic_read in the kernel are like that,
> though. :)

My use of atomic_read in SLUB is like that. Volatile does not magically 
sync up reads somehow.

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---

• References:
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: "Paul E. McKenney" <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Christoph Lameter <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Satyam Sharma <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Herbert Xu <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Christoph Lameter <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Paul Mackerras <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Herbert Xu <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Paul Mackerras <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Herbert Xu <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Paul Mackerras <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Herbert Xu <[email protected]>
  • Re: [PATCH 0/24] make atomic_read() behave consistently across all architectures
    • From: Paul Mackerras <[email protected]>

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