[Bug 281276] Re: Upgrade linux-rt to 2.6.27

Thomas E Jenkins thomas.jenkins at gmail.com
Tue Oct 28 20:47:06 GMT 2008

I hope I'm not stepping on toes reopening this. I wasn't able to find
guidelines about already closed reports.

Using the linux-rt 2.6.27-3.8 released yesterday I still have at least
some of the issues listed in the above comment by Luke Yelavich

Only one CPU is used and shutdown/restart do not work. Perhaps of note
is that the rt variant does not set CONFIG_NR_CPU which is set to 64 in
2.6.27-7-generic and 8 in the old 2.6.24-21-rt and also does not set
CONFIG_SMP which set to y on the others.

After booting 2.6.27-3-rt dmesg contains this line:

[    0.000000] WARNING: NR_CPUS limit of 1 reached. Processor ignored.

Compared to booting the non-rt 2.6.27-7-generic:

[    0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs
[    0.000000] PERCPU: Allocating 64928 bytes of per cpu data
[    0.000000] NR_CPUS: 64, nr_cpu_ids: 2, nr_node_ids 1

** Changed in: linux-rt (Ubuntu)
       Status: Fix Released => Confirmed

Upgrade linux-rt to 2.6.27
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