I have bee using Xen for a few months now on different systems. Kernel 2.6.15 with xen-3.0.1-4 has been stable for me on a few test machines and a Dell Power Edge server. Today I installed FC5+xen on one of our beefier machines the Proliant G3 DL380, dual Xeon 3ghz with 2GB ram. I keep having kernel crashes with the following error below... any tips or advice would be greatly apretiated. I tried kernel 2.6.20xxx and had kernel crashes with that version as well. This machine has been running fine on CentOS 4.3 for severval months. Installed versions: xen-3.0.1-4 kernel-xenU-2.6.15-1.2054_FC5 kernel-xen0-2.6.15-1.2054_FC5 Thanks! ------------[ cut here ]------------ kernel BUG at mm/mmap.c:2050! invalid opcode: 0000 [#1] SMP Modules linked in: bridge nls_utf8 ipv6 ppdev autofs4 hidp rfcomm l2cap bluetooth sunrpc sr_mod sg ip_conntrack_netbios_ns ipt_REJECT xt_state ip_conntrack nfnetlink xt_tcpudp iptable_filter ip_tables x_tables video button battery ac lp parport_pc parport nvram usb_storage ehci_hcd uhci_hcd tg3 hw_random e752x_edac edac_mc dm_snapshot dm_zero dm_mirror dm_mod ext3 jbd cciss sd_mod scsi_mod CPU: 0 EIP: 0061:[<c014b790>] Not tainted VLI EFLAGS: 00210202 (2.6.15-1.2054_FC5xen0 #1) EIP is at exit_mmap+0xe0/0xee eax: 00000000 ebx: c1eef260 ecx: f3ff3b80 edx: fbc16000 esi: 00000000 edi: f2146dc0 ebp: f2432430 esp: f2459e4c ds: 007b es: 007b ss: 0069 Process xenstored (pid: 2414, threadinfo=f2458000 task=f2432430) Stack: <0>0000006f c1eef260 f2146dc0 f2146dc0 f2146df8 c011a514 f2146dc0 f24328f8 f2146dc0 c011de70 f2146dc0 f2432430 f2432430 0000000b f2459eac c011f579 0000000b 00000001 ffffffff ffffffff 00000001 f2458000 c0ef60c0 0000000b Call Trace: [<c011a514>] mmput+0x1e/0x93 [<c011de70>] exit_mm+0x112/0x118 [<c011f579>] do_exit+0x1a5/0x6f4 [<c011fb51>] sys_exit_group+0x0/0x11 [<c03c764c>] inflate_dynamic+0x20/0x53d [<c0127813>] get_signal_to_deliver+0x467/0x490 [<c03c7a84>] inflate_dynamic+0x458/0x53d [<c011323d>] do_page_fault+0x0/0x6a8 [<c01042c7>] do_notify_resume+0x8b/0x623 [<c0168e97>] do_ioctl+0x4f/0x5f [<c0113384>] do_page_fault+0x147/0x6a8 [<c01137da>] do_page_fault+0x59d/0x6a8 [<c016914c>] sys_ioctl+0x48/0x64 [<c011323d>] do_page_fault+0x0/0x6a8 [<c0104bfb>] work_notifysig+0x13/0x18 Code: 47 00 00 c7 43 04 00 00 00 00 58 5a 57 e8 6a 73 fb ff 58 eb 09 89 f0 e8 e1 fe ff ff 89 c6 85 f6 75 f3 83 bf 98 00 00 00 00 74 08 <0f> 0b 02 08 40 05 31 c0 5b 5e 5b 5e 5f c3 55 57 56 53 83 ec 0c <1>Fixing recursive fault but reboot is needed! -- Alex Barger WebXtreme, Inc