Re: [PATCH] Fix RCU race in access of nohz_cpu_mask

Andrew Morton writes:

> So foo_mb() in preemptible code is potentially buggy.
> 
> I guess we assume that a context switch accidentally did enough of the
> right types of barriers for things to work OK.

The context switch code on powerpc includes an mb() for exactly this
reason.

Paul.
-
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] Fix RCU race in access of nohz_cpu_mask
    • From: Oleg Nesterov <[email protected]>
  • Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
    • From: Srivatsa Vaddagiri <[email protected]>
  • Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
    • From: Oleg Nesterov <[email protected]>
  • Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
    • From: Srivatsa Vaddagiri <[email protected]>
  • Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
    • From: Oleg Nesterov <[email protected]>
  • Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
    • From: "Paul E. McKenney" <[email protected]>
  • Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
    • From: Andrew Morton <[email protected]>

• Prev by Date: Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
• Next by Date: Re: [RFC 1/6] Framework
• Previous by thread: Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
• Next by thread: Re: [PATCH] Fix RCU race in access of nohz_cpu_mask
• 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]