On Tue, Jun 04, 2013 at 11:36:23PM +0000, KY Srinivasan wrote: > > > > -----Original Message----- > > From: Greg KH [mailto:greg@xxxxxxxxx] > > Sent: Tuesday, June 04, 2013 6:44 PM > > To: Fengguang Wu > > Cc: KY Srinivasan; devel@xxxxxxxxxxxxxxxxxxxxxx; Greg Kroah-Hartman; linux- > > kernel@xxxxxxxxxxxxxxx > > Subject: Re: [hv] BUG: kernel freezes after [ 13.356381] PCI: CLS 0 bytes, default > > 64 > > > > On Tue, Jun 04, 2013 at 10:15:36PM +0800, Fengguang Wu wrote: > > > Greetings, > > > > > > I got the below dmesg (kernel freezes at the end of it) and the first bad commit > > is > > > > > > commit cf6a2eacbcb2593b5b91d0817915c4f0464bb534 > > > Author: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > > > Date: Thu Dec 1 09:59:34 2011 -0800 > > > > > > drivers: hv: Don't OOPS when you cannot init vmbus > > > > > > The hv vmbus driver was causing an OOPS since it was trying to register > > drivers > > > on top of the bus even if initialization of the bus has failed for some > > > reason (such as the odd chance someone would run a hv enabled kernel in a > > > non-hv environment). > > > > > > Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx> > > > Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > > > Cc: stable <stable@xxxxxxxxxxxxxxx> > > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> > > > > > > [ 13.356381] PCI: CLS 0 bytes, default 64 > > > > Ick, not good. K.Y., any reason why I shouldn't just revert this? > > I have asked Wu for details. Examining the relevant VMBUS code, I cannot see > how this patch could be responsible for the freeze. For what it is worth looking at dmesg, it appears that > we are not running on a Hypervisor. Oops sorry - it's found to be a wrong bisect: the parent commit will panic and reboot (dmesg 1). The "first bad" commit fixes this which reveals the one kernel freeze bug we are talking about (dmesg 2 and 3). I'll teach the bisect script to double check for any bad dmesgs in the parent commit, too. Sorry for the noises! dmesg 1) [ 46.712057] Initializing Realtek PCIE storage driver... [ 46.718895] hv_vmbus: registering driver storvsc [ 46.721199] ------------[ cut here ]------------ [ 46.725102] kernel BUG at /c/wfg/linux-mmotm/drivers/base/driver.c:227! [ 46.725102] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC [ 46.725102] CPU 0 [ 46.725102] Modules linked in: [ 46.725102] [ 46.725102] Pid: 1, comm: swapper Not tainted 3.2.0-rc1-00032-gd2554f5 #5 Bochs Bochs [ 46.725102] RIP: 0010:[<ffffffff819479b9>] [<ffffffff819479b9>] driver_register+0x24/0x116 [ 46.725102] RSP: 0018:ffff88001e3d7e60 EFLAGS: 00010246 [ 46.725102] RAX: ffffffff8412bb40 RBX: ffffffff84118440 RCX: 0000000021c921c8 [ 46.725102] RDX: 0000000000000000 RSI: ffffffff82d50b77 RDI: ffffffff84118440 [ 46.725102] RBP: ffff88001e3d7ea0 R08: 0000000000000002 R09: ffffffff84f219b0 [ 46.725102] R10: ffff88001e3d7fd8 R11: 0000000012250d00 R12: 0000000000000000 [ 46.725102] R13: ffffffff83ad69d3 R14: 0000000000000000 R15: 0000000000000000 [ 46.725102] FS: 0000000000000000(0000) GS:ffff88001f200000(0000) knlGS:0000000000000000 [ 46.725102] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 46.725102] CR2: 00000000ffffffff CR3: 0000000003e0e000 CR4: 00000000000006f0 [ 46.725102] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.725102] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 46.725102] Process swapper (pid: 1, threadinfo ffff88001e3d6000, task ffff88001e3d8040) [ 46.725102] Stack: [ 46.725102] ffff88001e3d7eb0 ffff88001e3d7e70 ffff88001e3d7e80 ffffffff84118420 [ 46.725102] 0000000000000000 ffffffff83ad69d3 0000000000000000 0000000000000000 [ 46.725102] ffff88001e3d7ed0 ffffffff8279ff08 ffffffff83e69268 ffffffff845ca850 [ 46.725102] Call Trace: [ 46.725102] [<ffffffff8279ff08>] __vmbus_driver_register+0x4a/0x5c [ 46.725102] [<ffffffff844571fd>] ? rtsx_init+0x29/0x29 [ 46.725102] [<ffffffff84457232>] storvsc_drv_init+0x35/0x3f [ 46.725102] [<ffffffff81002099>] do_one_initcall+0x7f/0x13a [ 46.725102] [<ffffffff843dec92>] kernel_init+0xce/0x148 [ 46.725102] [<ffffffff82d59a44>] kernel_thread_helper+0x4/0x10 [ 46.725102] [<ffffffff82d50fb4>] ? retint_restore_args+0x13/0x13 [ 46.725102] [<ffffffff843debc4>] ? start_kernel+0x3fa/0x3fa [ 46.725102] [<ffffffff82d59a40>] ? gs_change+0x13/0x13 [ 46.725102] Code: 5c 41 5d 41 5e 5d c3 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 66 66 66 66 90 48 8b 47 08 48 89 fb 4 8 83 78 68 00 75 02 <0f> 0b 48 83 78 30 00 74 07 48 83 7f 30 00 75 1c 48 83 78 38 00 [ 46.725102] RIP [<ffffffff819479b9>] driver_register+0x24/0x116 [ 46.725102] RSP <ffff88001e3d7e60> [ 46.966780] ---[ end trace 3dd4b4c5cfb57f3a ]--- [ 46.973158] swapper used greatest stack depth: 3688 bytes left [ 47.005973] Kernel panic - not syncing: Attempted to kill init! [ 47.008702] Pid: 1, comm: swapper Tainted: G D 3.2.0-rc1-00032-gd2554f5 #5 [ 47.014326] Call Trace: [ 47.015625] [<ffffffff82d0218c>] panic+0xa0/0x1b3 [ 47.022083] [<ffffffff82d503b2>] ? _raw_write_unlock_irq+0x2e/0x47 [ 47.026970] [<ffffffff810a0e69>] do_exit+0x9b/0x797 [ 47.041007] [<ffffffff8109f124>] ? kmsg_dump+0x86/0x12e [ 47.043343] [<ffffffff82d51c53>] oops_end+0xaf/0xb8 [ 47.056684] [<ffffffff81048eb4>] die+0x5a/0x66 [ 47.063927] [<ffffffff82d51781>] do_trap+0x11a/0x129 [ 47.148336] [<ffffffff81046b52>] do_invalid_op+0x98/0xa1 [ 47.150775] [<ffffffff819479b9>] ? driver_register+0x24/0x116 [ 47.171468] [<ffffffff810cc02b>] ? trace_hardirqs_off_caller+0x3f/0x9e [ 47.186517] [<ffffffff81671f6d>] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 47.197010] [<ffffffff82d50fe4>] ? restore_args+0x30/0x30 [ 47.199568] [<ffffffff82d598bb>] invalid_op+0x1b/0x20 [ 47.220202] [<ffffffff82d50b77>] ? _raw_spin_unlock_irqrestore+0x3e/0x61 [ 47.223015] [<ffffffff819479b9>] ? driver_register+0x24/0x116 [ 47.238554] [<ffffffff8279ff08>] __vmbus_driver_register+0x4a/0x5c [ 47.252987] [<ffffffff844571fd>] ? rtsx_init+0x29/0x29 [ 47.255383] [<ffffffff84457232>] storvsc_drv_init+0x35/0x3f [ 47.284949] [<ffffffff81002099>] do_one_initcall+0x7f/0x13a [ 47.293599] [<ffffffff843dec92>] kernel_init+0xce/0x148 [ 47.295865] [<ffffffff82d59a44>] kernel_thread_helper+0x4/0x10 [ 47.308746] [<ffffffff82d50fb4>] ? retint_restore_args+0x13/0x13 [ 47.322365] [<ffffffff843debc4>] ? start_kernel+0x3fa/0x3fa [ 47.324743] [<ffffffff82d59a40>] ? gs_change+0x13/0x13 [ 47.341145] Rebooting in 10 seconds.. dmesg 2) [ 102.384974] VFS: Mounted root (nfs filesystem) on device 0:16. [ 102.386750] debug: unmapping init memory ffffffff84208000..ffffffff845ee000 [ 102.390166] Write protecting the kernel read-only data: 47104k [ 102.398549] debug: unmapping init memory ffff880002d65000..ffff880002e00000 [ 102.400722] debug: unmapping init memory ffff880003c15000..ffff880003e00000 [ 103.108549] modprobe used greatest stack depth: 3352 bytes left [ 105.511184] S02mountkernfs. used greatest stack depth: 3264 bytes left [ 110.928107] eth0: no IPv6 routers present [ 111.393157] cdrom_id used greatest stack depth: 2944 bytes left BUG: kernel freezed dmesg 3) [ 108.880449] VFS: Mounted root (nfs filesystem) on device 0:16. [ 108.883544] debug: unmapping init memory ffffffff84208000..ffffffff845ee000 [ 108.902348] Write protecting the kernel read-only data: 47104k [ 108.912389] debug: unmapping init memory ffff880002d65000..ffff880002e00000 [ 108.926343] debug: unmapping init memory ffff880003c15000..ffff880003e00000 [ 109.872198] modprobe used greatest stack depth: 3352 bytes left [ 113.101880] create_static_n used greatest stack depth: 3312 bytes left [ 116.634463] scsi_id used greatest stack depth: 2912 bytes left [ 116.955018] eth0: no IPv6 routers present [ 8538.332146] hrtimer: interrupt took 13301848 ns BUG: kernel freezed Thanks, Fengguang _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
