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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9b5) Gecko/2008042803 Red Hat/3.0b5-0.beta5.6.el5 Firefox/3.0b5 Description of problem: I try to run Fedora 9 x86_64 paravirtualized on RedHat EL 5 x86_64 on Dell 2950. CPU: Intel Quadcore, RAM: 8GB, Disk: RAID5 While installation and running Fedora detects only one CPU although more than one VCPU is set in the according xen-config file. "cat /proc/cpuinfo" shows only one CPU in guest system. xen-config (/etc/xen/fedora) on host system: name = "fedora" uuid = "02a35f2f-8f4f-c8d2-c8f5-1fea42ae0132" maxmem = 512 memory = 512 vcpus = 4 bootloader = "/usr/bin/pygrub" on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ "type=vnc,vncunused=1,keymap=de" ] disk = [ "phy:/dev/sda7,xvda,w" ] vif = [ "mac=00:16:3e:11:f8:d3,bridge=xenbr0" ] Fedora 8 x8_64 detects 4 CPUs with the same configuration. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Install RedHat EL 5 x86_64 as host 2. Config paravirtualized guest machine via virtual machine manager, with 4 VCPUs 3. Install Fedora 9 x86_64 from network source 4. Within installation switch to console and type in "cat /proc/cpuinfo" or 5. Install Fedora and after that type in "cat /proc/cpuinfo" Actual Results: - Only 1 CPU is detected by Fedora - The CPU settings for this guest is automatically reset to 1 CPU in "Virtual machine manager" when Fedora guest starts - Paravirtualized Fedora 8 detects 4 CPUs as expected Expected Results: According to xen-config file more than one CPU has to be detected by Fedora Additional info:
Yep, x86_64 xen DomU doesn't currently have SMP support - see also bug #437947
Okay, with kernel-xen-2.6.27-0.2.rc0.git6.fc10.x86_64 we have SMP support again $> uname -r 2.6.27-0.2.rc0.git6.fc10.x86_64.xen.x86_64 $> cat /proc/cpuinfo | grep processor processor : 0 processor : 1
*** Bug 460292 has been marked as a duplicate of this bug. ***