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xen-users
RE: [Xen-users] kernel-xen can not recognize more than 32 cores
We saw the same thing with our Dell R815 servers. I believe this limit is not due to the kernel, but to the hypervisor. Most 3.x releases of Xen had harcoded NR_CPUS to 32. Run "xm dmesg" and see how many cores the hypervisor recognizes. From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of mohammad mohammadi
Sent: Friday, March 04, 2011 8:14 AM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] kernel-xen can not recognize more than 32 cores Hi
I've installed xen hypervisor 3.0.3 on CentOS 5.5 from CentOS repository.
The hardware I use is a Tyan server with 48 cores( 4*12-cores processors ).
The original CentOS kernel 2.6.18.194 can recognize 48 cores perfectly, but when I switch to another kernel to use xen, the kernel recognize only 32 cores!
I tried to recompile the kernel by changing the maximum number of cpu in .config file, but nothing changed!
Can anyone help me?
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