Messages in this thread |  | | | Date | Tue, 2 Oct 2007 11:45:59 +0200 | | From | Pavel Machek <> | | Subject | Re: cpu hotplug support broken in 2.6.23-rc3 |
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Hi!
> > > Venki sent me an initial patch, but it has issues with the notify > > > ordering. Find below my "cache the broadcast flags" version for testing. > > > > Hmmpf, the flag is still cleared when the cpu goes offline. Need to take > > a closer look. > > I finally tracked it down. There were several ways to turn the box into > a brick. Sigh ! > > Can you please test the combo patch below ?
Sorry, I was on holidays. I assume this is in -rc9 or so, already? Yes, seems so.
Unfortunately, cpu hotplug seems to be still behaving strangely in -rc9. I can echo 0 > online (and cpu will go down). I do echo 0 > online, again, and I get -EBUSY. Good. But I try to do echo 1 > online, and get -EBUSY, too... and that's bad :-(. root@amd:/sys/devices/system/cpu/cpu1# echo 0 > online root@amd:/sys/devices/system/cpu/cpu1# echo 0 > online -bash: echo: write error: Device or resource busy root@amd:/sys/devices/system/cpu/cpu1# echo 1 > online -bash: echo: write error: Device or resource busy root@amd:/sys/devices/system/cpu/cpu1# uname -a Linux amd 2.6.23-rc9 #507 SMP Tue Oct 2 09:58:40 CEST 2007 i686 GNU/Linux Kernel says:
Oct 2 11:42:12 amd log1n[1436]: ROOT LOGIN on `tty1' Oct 2 11:42:56 amd kernel: CPU 1 is now offline Oct 2 11:42:56 amd kernel: SMP alternatives: switching to UP code
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/
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