Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead

From: Christoph Lameter <[email protected]>
Date: Thu, 1 Nov 2007 06:01:14 -0700 (PDT)

> On Thu, 1 Nov 2007, David Miller wrote:
> 
> > IA64 seems to use it universally for every __get_cpu_var()
> > access, so maybe it works out somehow :-)))
> 
> IA64 does not do that. It addds the local cpu offset
> 
> #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, 
> __ia64_per_cpu_var(local_per_cpu_offset)))
> #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, 
> __ia64_per_cpu_var(local_per_cpu_offset)))

Oh I see, it's the offset itself which is accessed at the fixed
virtual address slot.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
    • From: Eric Dumazet <[email protected]>
  • Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
    • From: David Miller <[email protected]>
  • Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
    • From: Christoph Lameter <[email protected]>

• Prev by Date: Re: [PATCH/RFC] x86: unify Kconfig files
• Next by Date: Re: irq 21: nobody cared 2.6.24-rc1
• Previous by thread: Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
• Next by thread: Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]