Hi Avi, unfortunately I'm unable to reproduce this on any of my testing machine and I don't have access to problematic machine ATM. I'll report when I get chance to try again (and bisect if possible) n.
On Tue, Nov 09, 2010 at 11:57:11AM +0200, Avi Kivity wrote: > On 11/08/2010 09:41 PM, Nikola Ciprich wrote: >> Hi, >> after booting 2.6.36 on one of my testing machines, modprobe kvm-intel >> produces: >> >> [ 1349.991299] general protection fault: 0000 [#1] PREEMPT SMP >> [ 1349.997199] last sysfs file: /sys/module/drbd/parameters/cn_idx >> [ 1350.003201] CPU 2 >> [ 1350.005081] Modules linked in: kvm(+) ocfs2 ocfs2_nodemanager >> ocfs2_stack_user ocfs2_stackglue dlm configfs drbd lru_cache cn ipmi_si >> ipmi_devintf ipmi_msghandler autofs4 ipv6 lockd sunrpc ext3 jbd video >> backlight output sbs sbshc fan container battery ac parport_pc lp parport >> nvram sg joydev thermal usbhid e1000e processor button thermal_sys tpm_tis >> tpm tpm_bios i2c_i801 i2c_core pcspkr iTCO_wdt shpchp pci_hotplug sd_mod >> crc_t10dif raid1 dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod >> ext4 jbd2 crc32 crc16 uhci_hcd ohci_hcd ehci_hcd ahci libahci libata >> scsi_mod [last unloaded: ocfs2_nodemanager] >> [ 1350.063230] >> [ 1350.064817] Pid: 9066, comm: modprobe Not tainted 2.6.36lb.00_01_PRE11 #1 >> X8SIL/X8SIL >> [ 1350.072837] RIP: 0010:[<ffffffff8110801c>] [<ffffffff8110801c>] >> __kmalloc_track_caller+0x7c/0x210 >> [ 1350.081993] RSP: 0018:ffff880130471d38 EFLAGS: 00010002 >> [ 1350.087398] RAX: 0000000000000000 RBX: ffffffff81652640 RCX: >> 0000000000000000 >> [ 1350.094623] RDX: ffff880001a8fae0 RSI: 00000000000006a5 RDI: >> ffffffff81530d06 >> [ 1350.101847] RBP: ffff880130471d78 R08: ffffc90010c6e000 R09: >> 0000000000000000 >> [ 1350.109070] R10: 0000000000000000 R11: 0000000000000001 R12: >> 0000000000000202 >> [ 1350.116303] R13: 6574737973627573 R14: 00000000000000d0 R15: >> 00000000000000d0 >> [ 1350.123528] FS: 00007f46d8c426e0(0000) GS:ffff880001a80000(0000) >> knlGS:0000000000000000 >> [ 1350.131758] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b >> [ 1350.137595] CR2: 00007f46d8bd200f CR3: 00000001304ce000 CR4: >> 00000000000006e0 >> [ 1350.144819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: >> 0000000000000000 >> [ 1350.152044] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: >> 0000000000000400 >> [ 1350.159277] Process modprobe (pid: 9066, threadinfo ffff880130470000, >> task ffff88013ae6dcc0) >> [ 1350.167851] Stack: >> [ 1350.170008] 2222222222222222 ffffffff8107ff1f 000000000000000a >> 0000000000000000 >> [ 1350.178715]<0> ffffc90010ce0adb 000000000000000a 00000000000000d0 >> ffff88013021f820 >> [ 1350.186787]<0> ffff880130471da8 ffffffff810df9f0 0000000000000019 >> ffff88013021f3c8 >> [ 1350.195128] Call Trace: >> [ 1350.197668] [<ffffffff8107ff1f>] ? mod_sysfs_setup+0x38f/0x620 >> [ 1350.203680] [<ffffffff810df9f0>] kstrdup+0x40/0x100 >> [ 1350.208730] [<ffffffff8107ff1f>] mod_sysfs_setup+0x38f/0x620 >> [ 1350.214569] [<ffffffff8108199c>] sys_init_module+0x104c/0x11a0 >> [ 1350.220581] [<ffffffff81114440>] ? sys_read+0x50/0x90 >> [ 1350.225811] [<ffffffff8100242b>] system_call_fastpath+0x16/0x1b >> [ 1350.231909] Code: 59 00 41 f6 c6 10 75 67 9c 41 5c fa 65 48 8b 14 25 18 >> d4 00 00 48 8b 03 48 01 c2 4c 8b 2a 4d 85 ed 0f 84 6b 01 00 00 48 63 43 >> 18<4a> 8b 04 28 48 89 02 41 54 9d 66 45 85 f6 0f 88 37 01 00 00 8b >> [ 1350.254300] RIP [<ffffffff8110801c>] __kmalloc_track_caller+0x7c/0x210 >> [ 1350.261065] RSP<ffff880130471d38> >> [ 1350.264643] ---[ end trace 858b0a13120fab50 ]--- >> >> there's certainly something wrong... >> n. >> > > Looks like kvm_init() corrupts memory. > > Things to try: > > - add printk()s (or perf probe + trace-cmd record) to see if kvm_init() > terminates with an error, and if so, which label it jumps to > - comment out lines from kvm_init(), starting from the end and working > towards the beginning, to see which line introduces the error. You will > have to reboot after each try. Note you can do this in a VM since it is > before the check for hardware support. > - bisect > > -- > error compiling committee.c: too many arguments to function > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: ser...@linuxbox.cz ------------------------------------- -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
