Messages in this thread | | | Date | Thu, 30 Nov 2006 10:03:48 +0100 | From | Jens Axboe <> | Subject | CPU hotplug broken with 2GB VMSPLIT |
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Hi,
Just got a new notebook (Lenovo X60), setup a custom kernel and then I noticed that suspend to ram doesn't work anymore. The machine suspends just fine, on resume it brings back the text display but reboots after it has stalled for a few seconds. On the suggestion of Pavel, I tried testing CPU hotplug, and indeed he was right: I can offline 1 of the cores fine, bringing it back online freezes the machine for 3-4 seconds and then reboots.
carl:/sys/devices/system/cpu/cpu1 # echo 0 > online carl:/sys/devices/system/cpu/cpu1 # dmesg Breaking affinity for irq 219 CPU 1 is now offline SMP alternatives: switching to UP code carl:/sys/devices/system/cpu/cpu1 # echo 1 > online Read from remote host carl: Connection reset by peer
Booting with maxcpus=1 and resume works fine. Does this ring a bell with anyone? With highmem enabled and the standard vmsplit, cpu hotplug works fine for me.
-- Jens Axboe
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