Re: [PATCH] raise tsc clocksource rating

* Jeremy Fitzhardinge <[email protected]> wrote:

> > if it's inaccurate why are you exposing it to the guest then? Native 
> > only uses the TSC if it's safe and accurate to do so.
> 
> It is used as part of the Xen clocksource as a short term 
> extrapolator, with correction parameters supplied by the hypervisor.  
> It should never be used directly.

that's totally broken then. You cannot create an SMP-safe monotonic 
clocksource via interpolation - native does not do it either. Good thing 
this problem got exposed, it needs to be fixed.

	Ingo
-
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/

---

• Follow-Ups:
  • Re: [PATCH] raise tsc clocksource rating
    • From: Jeremy Fitzhardinge <[email protected]>

• References:
  • [PATCH] raise tsc clocksource rating
    • From: Glauber de Oliveira Costa <[email protected]>
  • Re: [PATCH] raise tsc clocksource rating
    • From: Zachary Amsden <[email protected]>
  • Re: [PATCH] raise tsc clocksource rating
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH] raise tsc clocksource rating
    • From: Jeremy Fitzhardinge <[email protected]>

• Prev by Date: Re: [RFC] Create instrumentation directory (git repository)
• Next by Date: Re: [PATCH] INPUT: fix hidinput_connect ignoring retval from input_register_device
• Previous by thread: Re: [PATCH] raise tsc clocksource rating
• Next by thread: Re: [PATCH] raise tsc clocksource rating
• 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]