Re: Dynamic tick for 2.6.14 - what's the plan?

From: Arjan van de Ven (arjan_at_infradead.org)
Date: 08/31/05

  • Next message: djani22_at_dynamicweb.hu: "2.6.13: do_vfs_lock: VFS is out of sync with lock manager!" 
    To: Tony Lindgren <tony@atomide.com>
Date:	Wed, 31 Aug 2005 10:39:26 +0200

    On Wed, 2005-08-31 at 10:44 +0300, Tony Lindgren wrote:
    > * Alistair John Strachan <s0348365@sms.ed.ac.uk> [050830 18:57]:
    > > On Tuesday 30 August 2005 13:31, Tony Lindgren wrote:
    > > [snip]
    > > > >
    > > > > Same issue, it's waiting on dynticks before being reworked.
    > > >
    > > > Also one more minor issue; Dyntick can cause slow boots with dyntick
    > > > enabled from boot because the there's not much in the timer queue
    > > > until init.
    > > >
    > > > This probably does not show up much on x86 though because of the
    > > > short hardware timers.
    > >
    > > You could disable it until jiffies >= 0; this covers the boot criteria and
    > > still allows for moderate savings post boot (though maybe on embedded systems
    > > the delay is too long?).
    >
    > Yeah, that's true. Or just enable it from an init script via sysfs.

    ehh
    why does it cause slow boots?
    if that kind of behavior changes... isn't that a sign there is a
    fundamental bug still ?

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

  • Next message: djani22_at_dynamicweb.hu: "2.6.13: do_vfs_lock: VFS is out of sync with lock manager!"

    Relevant Pages

    • Re: [patch, 2.6.10-rc2] sched: fix ->nr_uninterruptible handling bugs
      ... > I presume that you mean adjust rather than transfer. ... > changes CPU while in the UNINTERRUPTIBLE state. ... Yeah this won't actually work of course, because a task can set itself ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: Kernel SCM saga..
      ... > DL> just wanted to point out that recent news shows that sha1 isn't as ... It's possible to generate another object with the same hash, ... > yeah, yeah, I know about the current theoretical case, and I don't ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: Mem: and Swap: lines in /proc/meminfo
      ... Yeah. ... > ready to be used but just needs some flags updated? ... > possibly useful data, ... To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ ...
      (Linux-Kernel)
    • Re: GFP_ATOMIC vs GFP_KERNEL in netfilter module
      ... hooks, since they are run in interrupt context (when the packet is ... > being called after the delay. ... in the fact that your allocations are atomic versus not. ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)
    • Re: select() for delay.
      ... > three sets empty, n zero, and a non-null timeout as a fairly portable ... > This patch improves the sys_selectexecution when used for delay. ... send the line "unsubscribe linux-kernel" in ...
      (Linux-Kernel)