Messages in this thread | | | Date | Mon, 27 Aug 2007 23:58:23 +0200 | From | Pavel Machek <> | Subject | Re: cpu hotplug support broken in 2.6.23-rc3 |
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On Mon 2007-08-27 23:59:31, Rafael J. Wysocki wrote: > On Monday, 27 August 2007 23:32, Pavel Machek wrote: > > On Mon 2007-08-27 22:36:57, Jeff Chua wrote: > > > On 8/27/07, Pavel Machek <pavel@ucw.cz> wrote: > > > > On Mon 2007-08-27 12:43:50, Pavel Machek wrote: > > > > > Hi! > > > > > > > > > > Trying to do few onlines/offlines reliably hangs my machine (thinkpad > > > > > x60, i386 architecture). > > > > > > I just 3 cycles of on-line/off-line on 2.6.23-rc3 on ThinkPad x60s, > > > and my system still survives. > > > > Can you try 20-or-so tests? Mine hangs randomly, so it survived 4 or > > so cycles at one point. > > > > ...or maybe difference is in the .config, or maybe I broken something > > in my kernel sources.... > > Well, something seems to be wrong with the CPU hotplug, but it's insanely > difficult to reproduce on my boxes. > > I bet on one of the notifiers blocking while waiting on a frozen task.
It happens reliably for me, with this script... and randomly, when I just echo 0/1 > online from commandline... so it should not be anything with the frozen tasks.
echo test > /sys/power/disk echo disk > /sys/power/state
reliably hangs on resume in the attached script. It works ok with nosmp.
Pavel
#!/bin/bash killall klogd
echo -n "testing refrigerator (testproc)..." echo testproc > /sys/power/disk echo disk > /sys/power/state echo "okay"
sleep 2 echo -n "testing drivers (test)..." echo test > /sys/power/disk echo disk > /sys/power/state echo "okay"
sleep 2 echo -n "testing swsusp (reboot)..." echo reboot > /sys/power/disk echo disk > /sys/power/state echo "okay"
sleep 2 echo -n "testing s2ram..." s2ram echo "okay"
sleep 2 echo -n "testing swsusp (shutdown)..." echo shutdown > /sys/power/disk echo disk > /sys/power/state echo "okay"
sleep 2 echo -n "testing swsusp (platform)..." echo platform > /sys/power/disk echo disk > /sys/power/state echo "okay"
sleep 2 echo -n "testing s2ram..." s2ram echo "okay"
-- (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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