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Message-ID: <20061130090348.GK5400@kernel.dk> Date: Thu, 30 Nov 2006 10:03:48 +0100 From: Jens Axboe <jens.axboe@...cle.com> To: linux-kernel@...r.kernel.org Cc: akpm@...l.org Subject: CPU hotplug broken with 2GB VMSPLIT 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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