PROBLEM: tickless scheduling
in [Kernel]
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From: john stultz on 10 May 2010 21:00 On Mon, May 10, 2010 at 5:18 PM, Donald Allen <donaldcallen(a)gmail.com> wrote: > 1. Network file transfers and fscks stop on Toshiba netbook unless > system receives external events Can you provide /proc/timer_list output? I assume booting with nohz=off from grub resolves the issue? Sounds similar to https://bugzilla.kernel.org/show_bug.cgi?id=12118 thanks -john -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Donald Allen on 10 May 2010 21:10 On Mon, May 10, 2010 at 8:54 PM, john stultz <johnstul(a)us.ibm.com> wrote: > On Mon, May 10, 2010 at 5:18 PM, Donald Allen <donaldcallen(a)gmail.com> wrote: >> 1. Network file transfers and fscks stop on Toshiba netbook unless >> system receives external events > > Can you provide /proc/timer_list output? Attached, but again, this is from the system running with tickless disabled. > > I assume booting with nohz=off from grub resolves the issue? Didn't know about the boot-time option (thanks for pointing it out), but I wanted to build a custom kernel anyway, so i did so and disabled tickless. > > Sounds similar to https://bugzilla.kernel.org/show_bug.cgi?id=12118 Sure does. /Don > > thanks > -john >
From: john stultz on 10 May 2010 21:20 On Mon, 2010-05-10 at 20:59 -0400, Donald Allen wrote: > On Mon, May 10, 2010 at 8:54 PM, john stultz <johnstul(a)us.ibm.com> wrote: > > On Mon, May 10, 2010 at 5:18 PM, Donald Allen <donaldcallen(a)gmail.com> wrote: > >> 1. Network file transfers and fscks stop on Toshiba netbook unless > >> system receives external events > > > > Can you provide /proc/timer_list output? > > Attached, but again, this is from the system running with tickless disabled. Is it possible to boot with the kernel showing the issue and provide the details? > > I assume booting with nohz=off from grub resolves the issue? > > Didn't know about the boot-time option (thanks for pointing it out), > but I wanted to build a custom kernel anyway, so i did so and disabled > tickless. Ok. It may still be of value to know booting with nohz=off does avoid the problem. thanks -john -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Donald Allen on 10 May 2010 22:00 On Mon, May 10, 2010 at 9:12 PM, john stultz <johnstul(a)us.ibm.com> wrote: > On Mon, 2010-05-10 at 20:59 -0400, Donald Allen wrote: >> On Mon, May 10, 2010 at 8:54 PM, john stultz <johnstul(a)us.ibm.com> wrote: >> > On Mon, May 10, 2010 at 5:18 PM, Donald Allen <donaldcallen(a)gmail.com> wrote: >> >> 1. Network file transfers and fscks stop on Toshiba netbook unless >> >> system receives external events >> > >> > Can you provide /proc/timer_list output? >> >> Attached, but again, this is from the system running with tickless disabled. > > Is it possible to boot with the kernel showing the issue and provide the > details? It's a minor pain, but I'll do it. > > >> > I assume booting with nohz=off from grub resolves the issue? >> >> Didn't know about the boot-time option (thanks for pointing it out), >> but I wanted to build a custom kernel anyway, so i did so and disabled >> tickless. > > Ok. It may still be of value to know booting with nohz=off does avoid > the problem. Ok. When I've got the original kernel installed and bootable, I'll try it. I won't be able to get to this for a day or so. /Don > > > thanks > -john > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Donald Allen on 12 May 2010 16:00
Before doing what you asked, I ran my home-brew backup script, which tars up the whole machine, save my home directory, to a big sata drive in a usb shoebox. I did so by booting the most recent Arch Linux install/live CD (while I use Slackware, the Slackware install CDs are not suitable for this sort of thing, having very old versions of things like tar). While doing so, I observed exactly the same symptoms I did with the Slackware 13.1 install, which I described in the bug report. So rather than messing with the hard-won custom kernel that I now have installed on the netbook, I am attaching the various things from /proc gathered with the Arch kernel running. Yes, it's a somewhat older kernel (2.6.30), but I'm hoping that things haven't changed much in tickless land. If that's not the case, then I will attempt to reproduce this with the newer kernel on the Slackware 13.1 install DVD. Let me know if you need me to do this. The attached tar file is bzip2-compressed, so you want xjf to extract. /Don On Mon, May 10, 2010 at 9:52 PM, Donald Allen <donaldcallen(a)gmail.com> wrote: > On Mon, May 10, 2010 at 9:12 PM, john stultz <johnstul(a)us.ibm.com> wrote: >> On Mon, 2010-05-10 at 20:59 -0400, Donald Allen wrote: >>> On Mon, May 10, 2010 at 8:54 PM, john stultz <johnstul(a)us.ibm.com> wrote: >>> > On Mon, May 10, 2010 at 5:18 PM, Donald Allen <donaldcallen(a)gmail.com> wrote: >>> >> 1. Network file transfers and fscks stop on Toshiba netbook unless >>> >> system receives external events >>> > >>> > Can you provide /proc/timer_list output? >>> >>> Attached, but again, this is from the system running with tickless disabled. >> >> Is it possible to boot with the kernel showing the issue and provide the >> details? > > It's a minor pain, but I'll do it. > >> >> >>> > I assume booting with nohz=off from grub resolves the issue? >>> >>> Didn't know about the boot-time option (thanks for pointing it out), >>> but I wanted to build a custom kernel anyway, so i did so and disabled >>> tickless. >> >> Ok. It may still be of value to know booting with nohz=off does avoid >> the problem. > > Ok. When I've got the original kernel installed and bootable, I'll try > it. I won't be able to get to this for a day or so. > > /Don > >> >> >> thanks >> -john >> >> > |