Description of problem: Version-Release number of selected component (if applicable): xen-3.0.3-25.0.3.el5 kernel-xen-2.6.18-8.1.6.el5 How reproducible: I have installed RHEL 5 with virtualization and creates a virtual machine with 2GB RAM and one VCPU in virt-manager that runs RHEL 4.5. The installation goes fine but then when i shutdown the virtual machine and start it again, i get a kernel panic. The problem is that i doesnt get the error everytime i boot the machine, it looks like it reproduces when i have several virtual machines and take them up and down. I also had a virtual machine that got kernel panic everytime, when i changed the amount of memory to 1GB it booted, so it looks like memory problems. I have only used paravirtualizated machines and tested both with partition and image file. I have run memtest on the host machine and found no errors. hardware: HP DL380 with 2CPU:s and 12GB RAM Steps to Reproduce: 1.Create a paravirtualizated host with virt-manager with 2GB RAM and 1 cpu 2.Install RHEL 4.5 3. boot the virtual machine 4. shutdown the virtual machine 5. change memory settings in the configurationfile to 4GB 6. boot the virtual machine Actual results: kernel panic ------------[ cut here ]------------ kernel BUG at arch/i386/mm/pgtable-xen.c:306! invalid operand: 0000 [#1] SMP Modules linked in: dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod xenblk sd_mod scsi_mod CPU: 0 EIP: 0061:[<c011163a>] Not tainted VLI EFLAGS: 00010282 (2.6.9-55.ELxenU) EIP is at pgd_ctor+0x1d/0x26 eax: fffffff4 ebx: 00000000 ecx: f5392000 edx: 00000000 esi: c21a2d80 edi: ed6778e0 ebp: 00000001 esp: ec8b6de4 ds: 007b es: 007b ss: 0068 Process hotplug (pid: 340, threadinfo=ec8b6000 task=ec8b05c0) Stack: c0141ad5 ec8d3000 c21a2d80 00000001 ec8d3000 ed6778e0 c21a2d80 c21a2e40 c0141c57 c21a2d80 ed6778e0 00000001 c21a2d80 ed6778e0 ec8d3000 00000010 00000001 000000d0 c21c9080 0000000c c21a2e08 c21a2d80 c0141e46 c21a2d80 Call Trace: [<c0141ad5>] cache_init_objs+0x35/0x56 [<c0141c57>] cache_grow+0xfb/0x187 [<c0141e46>] cache_alloc_refill+0x163/0x19c [<c0142061>] kmem_cache_alloc+0x67/0x97 [<c0111671>] pgd_alloc+0x17/0x336 [<c01199d4>] mm_init+0xd7/0x116 [<c01199e4>] mm_init+0xe7/0x116 [<c0119a3d>] mm_alloc+0x2a/0x31 [<c0162b55>] do_execve+0x82/0x210 [<c0105d79>] sys_execve+0x2c/0x8e [<c010737f>] syscall_call+0x7/0xb Code: 74 02 66 a5 a8 01 74 01 a4 5e 5b 5e 5f c3 80 3d 04 f7 2e c0 00 75 1c 6a 20 6a 00 ff 74 24 0c e8 ce 37 00 00 83 c4 0c 85 c0 74 08 <0f> 0b 32 01 2f 2b 27 c0 c3 80 3d 04 f7 2e c0 00 75 0d c7 44 24 <0>Fatal exception: panic in 5 seconds see more in attachment Expected results: the machine boots Additional info: The second time you boot the machine with more memory, the machine works.
Created attachment 158501 [details] whole kernel panic
This is against the wrong component; the problem here is really that the RHEL-4 PV guest kernel was crashing. However, that bug was solved in 4.6 by BZ 233543. Closing as a dup; if you continue to experience problems, please re-open. Thanks, Chris Lalancette *** This bug has been marked as a duplicate of 233543 ***