On Sun, 2009-06-28 at 17:11 +0300, Avi Kivity wrote: > > 1) I get the $subject warning a lot, when starting kvm: > > [85763.262707] BUG: using smp_processor_id() in preemptible [00000000] code: kvm/13877 > > [85763.262719] caller is kvm_write_guest_time+0x40/0x220 [kvm] > > [85763.262722] Pid: 13877, comm: kvm Not tainted 2.6.30-wl-26837-g0ee651a-dirty #54 > > [85763.262725] Call Trace: > > [85763.262729] [<ffffffff8041d482>] debug_smp_processor_id+0xf2/0x100 > > [85763.262741] [<ffffffffa0331390>] kvm_write_guest_time+0x40/0x220 [kvm] > > [85763.262753] [<ffffffffa0331890>] vcpu_enter_guest+0x320/0x580 [kvm] > > [85763.262780] [<ffffffffa03347f4>] __vcpu_run+0x74/0x2f0 [kvm] > > [85763.262792] [<ffffffffa033571f>] kvm_arch_vcpu_ioctl_run+0x8f/0x200 [kvm] > > [85763.262804] [<ffffffffa0329b48>] kvm_vcpu_ioctl+0x4b8/0x900 [kvm] > > [85763.262816] [<ffffffff802f5216>] vfs_ioctl+0x36/0xb0 > > [85763.262819] [<ffffffff802f55f9>] do_vfs_ioctl+0x89/0x320 > > [85763.262826] [<ffffffff802f58df>] sys_ioctl+0x4f/0x80 > > [85763.262830] [<ffffffff8020b6fb>] system_call_fastpath+0x16/0x1b > > > > > > ISTR this was fixed... > > > That kernel version is wireless-testing, which is currently based on > > v2.6.30, and the -dirty is for some wireless patches I did. > > > > Please post the output of 'git merge-base wireless-testing > origin/master' so I can know what tree to look at. ITYM $ git merge-base wireless-testing/master linux-2.6/master 07a2039b8eb0af4ff464efd3dfd95de5c02648c6 $ git describe 07a2039b8eb0af4ff464efd3dfd95de5c02648c6 v2.6.30 since my personal 'origin' branch is something completely different. > > 2) The second problem is that it doesn't actually work. I use this > > command line: > > kvm -kernel arch/x86_64/boot/bzImage \ > > -hda ../uml/Ubuntu-IntrepidIbex-amd64-root_fs \ > > -append "root=/dev/hda console=ttyS0" -curses > > > > and the system hangs after > > Plex86/Bochs VGABios (PCI) current-cvs 12 Jun 2009 > > This VGA/VBE Bios is released under the GNU LGPL > > > > Please visit : > > . http://bochs.sourceforge.net > > . http://www.nongnu.org/vgabios > > > > cirrus-compatible VGA is detected > > > > QEMU BIOS - build: 06/12/09 > > $Revision: 1.182 $ $Date: 2007/08/01 17:09:51 $ > > Options: apmbios pcibios eltorito rombios32 > > > > ata0 master: QEMU HARDDISK ATA-7 Hard-Disk (1024 MBytes) > > ata1 master: QEMU DVD-ROM ATAPI-4 CD-Rom/DVD-Rom > > > > Press F12 for boot menu. > > > > > > Decompressing Linux... Parsing ELF... done. > > Booting the kernel. > > > > Does it hang or switch to some graphics mode? What happens if you drop > curses? Same, I just used curses to copy/paste the messages I get. > You can see where it hangs using the monitor 'info registers' and 'x/30i > $eip' commands. not much luck since it doesn't hang at a specific instruction: (qemu) info registers RAX=0000000000000001 RBX=0000000000000000 RCX=0000000001062560 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffffffff80a6dd98 RSP=ffffffff80a6dd98 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=000000011544e510 R13=0000000000000010 R14=0000000000000b8e R15=ffff8800001fee00 RIP=ffffffff803d5360 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0018 0000000000000000 ffffffff 00c09300 CS =0010 0000000000000000 ffffffff 00a09b00 SS =0018 0000000000000000 ffffffff 00c09300 DS =0018 0000000000000000 ffffffff 00c09300 FS =0000 0000000000000000 ffffffff 00000000 GS =0000 ffff880006200000 ffffffff 00000000 LDT=0000 0000000000000000 ffffffff 00000000 TR =0040 ffff8800063d0a40 00002087 00008b00 GDT= ffff880006204000 0000007f IDT= ffffffff80ca5000 00000fff CR0=8005003b CR2=0000000000000000 CR3=0000000000201000 CR4=000006a0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00000000 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 (qemu) x/30i $eip 0xffffffff8028fc60: push %rbp 0xffffffff8028fc61: mov $0x1cebe8,%rax 0xffffffff8028fc68: mov %rsp,%rbp 0xffffffff8028fc6b: mov %gs:0xc8a0,%rdx 0xffffffff8028fc74: movq $0x0,(%rax,%rdx,1) 0xffffffff8028fc7c: leaveq 0xffffffff8028fc7d: retq 0xffffffff8028fc7e: xchg %ax,%ax 0xffffffff8028fc80: push %rbp 0xffffffff8028fc81: mov %rsp,%rbp 0xffffffff8028fc84: sub $0x10,%rsp 0xffffffff8028fc88: mov %rbx,(%rsp) 0xffffffff8028fc8c: mov %r12,0x8(%rsp) 0xffffffff8028fc91: mov $0x1cebe8,%rbx 0xffffffff8028fc98: mov %gs:0xc8a0,%r12 0xffffffff8028fca1: mov %gs:0xc8a8,%edi 0xffffffff8028fca9: callq 0xffffffff80268ef0 0xffffffff8028fcae: shr $0x1e,%rax 0xffffffff8028fcb2: mov %rax,(%r12,%rbx,1) 0xffffffff8028fcb6: mov (%rsp),%rbx 0xffffffff8028fcba: mov 0x8(%rsp),%r12 0xffffffff8028fcbf: leaveq 0xffffffff8028fcc0: retq 0xffffffff8028fcc1: nopw %cs:0x0(%rax,%rax,1) 0xffffffff8028fcd0: push %rbp 0xffffffff8028fcd1: mov $0x1,%esi 0xffffffff8028fcd6: mov %rsp,%rbp 0xffffffff8028fcd9: push %rbx 0xffffffff8028fcda: lea -0x20(%rbp),%rdx 0xffffffff8028fcde: sub $0x18,%rsp (qemu) info registers RAX=ffffffffffffffff RBX=0000000000000000 RCX=0000000001062560 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffffffff80a6de98 RSP=ffffffff80a6ddb8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000125ac5486 R13=0000000000000010 R14=0000000000000b8e R15=ffff8800001fee00 RIP=ffffffff805da6be RFL=00000296 [--S-AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0018 0000000000000000 ffffffff 00c09300 CS =0010 0000000000000000 ffffffff 00a09b00 SS =0018 0000000000000000 ffffffff 00c09300 DS =0018 0000000000000000 ffffffff 00c09300 FS =0000 0000000000000000 ffffffff 00000000 GS =0000 ffff880006200000 ffffffff 00000000 LDT=0000 0000000000000000 ffffffff 00000000 TR =0040 ffff8800063d0a40 00002087 00008b00 GDT= ffff880006204000 0000007f IDT= ffffffff80ca5000 00000fff CR0=8005003b CR2=0000000000000000 CR3=0000000000201000 CR4=000006a0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00000000 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 (qemu) x/30i $eip 0xffffffff80249ce6: leaveq 0xffffffff80249ce7: retq 0xffffffff80249ce8: nopl 0x0(%rax,%rax,1) 0xffffffff80249cf0: push %rbp 0xffffffff80249cf1: mov 0xa93668(%rip),%rax # 0xffffffff80cdd360 0xffffffff80249cf8: mov %rsp,%rbp 0xffffffff80249cfb: leaveq 0xffffffff80249cfc: retq 0xffffffff80249cfd: nopl (%rax) 0xffffffff80249d00: push %rbp 0xffffffff80249d01: xor %eax,%eax 0xffffffff80249d03: mov %rsp,%rbp 0xffffffff80249d06: cmpl $0x0,0xa9365f(%rip) # 0xffffffff80cdd36c 0xffffffff80249d0d: leaveq 0xffffffff80249d0e: sete %al 0xffffffff80249d11: retq 0xffffffff80249d12: nopw %cs:0x0(%rax,%rax,1) 0xffffffff80249d20: push %rbp 0xffffffff80249d21: mov 0xa93648(%rip),%rax # 0xffffffff80cdd370 0xffffffff80249d28: mov %rsp,%rbp 0xffffffff80249d2b: test %rax,%rax 0xffffffff80249d2e: je 0xffffffff80249d40 0xffffffff80249d30: inc %rax 0xffffffff80249d33: mov %rax,0xa93636(%rip) # 0xffffffff80cdd370 0xffffffff80249d3a: xor %eax,%eax 0xffffffff80249d3c: leaveq 0xffffffff80249d3d: retq 0xffffffff80249d3e: xchg %ax,%ax 0xffffffff80249d40: mov $0x8,%esi 0xffffffff80249d45: mov $0xffffffff80cdd370,%rdi (qemu) info registers RAX=0000000000000000 RBX=0000000000000000 RCX=0000000001062560 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000418958 RBP=ffffffff80a6dda8 RSP=ffffffff80a6dda8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=000000013473bc5c R13=0000000000000010 R14=0000000000000b8e R15=ffff8800001fee00 RIP=ffffffff803d53da RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0018 0000000000000000 ffffffff 00c09300 CS =0010 0000000000000000 ffffffff 00a09b00 SS =0018 0000000000000000 ffffffff 00c09300 DS =0018 0000000000000000 ffffffff 00c09300 FS =0000 0000000000000000 ffffffff 00000000 GS =0000 ffff880006200000 ffffffff 00000000 LDT=0000 0000000000000000 ffffffff 00000000 TR =0040 ffff8800063d0a40 00002087 00008b00 GDT= ffff880006204000 0000007f IDT= ffffffff80ca5000 00000fff CR0=8005003b CR2=0000000000000000 CR3=0000000000201000 CR4=000006a0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00000000 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 (qemu) x/30i $eip 0xffffffff805da6be: callq 0xffffffff8028fc60 0xffffffff805da6c3: mov %r12,%rdi 0xffffffff805da6c6: callq *0x702854(%rip) # 0xffffffff80cdcf20 0xffffffff805da6cc: mov $0x418958,%edi 0xffffffff805da6d1: mov %rax,%rbx 0xffffffff805da6d4: callq 0xffffffff803d53a0 0xffffffff805da6d9: lea 0x1(%r12,%rbx,1),%r12 0xffffffff805da6de: jmp 0xffffffff805da6be 0xffffffff805da6e0: movq $0xffffffff80249ce0,0x702835(%rip) # 0xffffffff80cdcf20 0xffffffff805da6eb: jmp 0xffffffff805da6a5 0xffffffff805da6ed: xor %eax,%eax 0xffffffff805da6ef: mov $0xffffffff806d0063,%rdi 0xffffffff805da6f6: callq 0xffffffff805da747 0xffffffff805da6fb: imul $0x3e8,0x702823(%rip),%eax # 0xffffffff80cdcf28 0xffffffff805da705: test %eax,%eax 0xffffffff805da707: jle 0xffffffff805da73d 0xffffffff805da709: xor %r12d,%r12d 0xffffffff805da70c: callq 0xffffffff80227860 0xffffffff805da711: mov %r12,%rdi 0xffffffff805da714: callq *0x702806(%rip) # 0xffffffff80cdcf20 0xffffffff805da71a: mov $0x418958,%edi 0xffffffff805da71f: mov %rax,%rbx 0xffffffff805da722: callq 0xffffffff803d53a0 0xffffffff805da727: lea 0x1(%r12,%rbx,1),%r12 0xffffffff805da72c: imul $0x3e8,0x7027f2(%rip),%eax # 0xffffffff80cdcf28 0xffffffff805da736: cltq 0xffffffff805da738: cmp %r12,%rax 0xffffffff805da73b: jg 0xffffffff805da70c 0xffffffff805da73d: callq 0xffffffff8025cd30 0xffffffff805da742: jmpq 0xffffffff805da6af > > The guest kernel is the same as the host, but with somewhat different > > config options. > > > > The strange thing here is that the exact same command line, with > > qemu-system-x86_64 instead of kvm works perfectly. > > > > That's probably a qemu without kvm support. Yes, I know that, I just used that to verify the guest kernel is ok. johannes
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