Hi!
> > > > Somehow, startup_32_smp() is on the stack twice. The stack unwind led > > > > to the startup_32_smp() frame at 0xf50cdf9c rather than the one at > > > > 0xf50cdfa8 (which is where it should normally be). So the question is > > > > how startup_32_smp() got executed the second time, with the wrong stack > > > > offset. > > > > > > Not much idea... but this is stack dump, right? Just because some > > > value is on the stack does not mean it is a return address, no? > > > > Right, but the one at 0xf50cdfa8 is where the startup_32_smp() is > > *supposed* to be. If the unwinder had unwinded to that one, it wouldn't > > have complained. So it looks to me like the CPU somehow booted twice: > > the first time at the right stack address, and the second time it > > somehow ended up with a different stack address. > > > > > And .... startup_32_smp is kind of "interesting" function. Take a > > > look... > > > > Yes, it's used in bringing up the CPU. > > Can you share your .config? Here you go... Meanwhile, another machine, same kernel: [ 0.359606] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 0.359681] pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff] [ 0.392020] WARNING: kernel stack frame pointer at f4ca9f98 in swapper/1:0 has bad value (null) [ 0.392023] unwind stack type:0 next_sp: (null) mask:a graph_idx:0 [ 0.392026] f4ca9ee0: 00000000f4ca9ee8 (0xf4ca9ee8) [ 0.392031] f4ca9ee4: 00000000c40489b7 (irq_exit+0x87/0xa0) [ 0.392032] f4ca9ee8: 00000000f4ca9ef4 (0xf4ca9ef4) [ 0.392036] f4ca9eec: 00000000c402f6d3 (smp_apic_timer_interrupt+0x33/0x40) [ 0.392037] f4ca9ef0: 0000000000000000 ... [ 0.392038] f4ca9ef4: 00000000f4ca9efd (0xf4ca9efd) [ 0.392042] f4ca9ef8: 00000000c4b7ac8e (apic_timer_interrupt+0x36/0x3c) [ 0.392042] f4ca9efc: 0000000000000000 ... [ 0.392044] f4ca9f0c: 00000000f4c82000 (0xf4c82000) [ 0.392045] f4ca9f10: 00000000f4ca9f38 (0xf4ca9f38) [ 0.392046] f4ca9f14: 0000000000000000 ... [ 0.392047] f4ca9f18: 0000000016e3007b (0x16e3007b) [ 0.392048] f4ca9f1c: 000000000000007b (0x7b) [ 0.392050] f4ca9f20: 00000000000000d8 (0xd8) [ 0.392051] f4ca9f24: 00000000175d00e0 (0x175d00e0) [ 0.392052] f4ca9f28: 00000000ffffff10 (0xffffff10) [ 0.392054] f4ca9f2c: 00000000c4b79883 (mwait_idle+0x43/0x70) [ 0.392055] f4ca9f30: 0000000000000060 (0x60) [ 0.392057] f4ca9f34: 0000000000200246 (0x200246) [ 0.392058] f4ca9f38: 00000000f4ca9f40 (0xf4ca9f40) [ 0.392061] f4ca9f3c: 00000000c401ed09 (arch_cpu_idle+0x9/0x10) [ 0.392062] f4ca9f40: 00000000f4ca9f48 (0xf4ca9f48) [ 0.392064] f4ca9f44: 00000000c4b799cf (default_idle_call+0x1f/0x30) [ 0.392065] f4ca9f48: 00000000f4ca9f60 (0xf4ca9f60) [ 0.392069] f4ca9f4c: 00000000c4083345 (do_idle+0x155/0x1d0) [ 0.392071] f4ca9f50: 00000000f4c82000 (0xf4c82000) [ 0.392072] f4ca9f54: 00000000fa696c2c (0xfa696c2c) [ 0.392073] f4ca9f58: 0000000000000087 (0x87) [ 0.392074] f4ca9f5c: 00000000cdcd762c (0xcdcd762c) [ 0.392075] f4ca9f60: 00000000f4ca9f78 (0xf4ca9f78) [ 0.392078] f4ca9f64: 00000000c408361d (cpu_startup_entry+0x5d/0x60) [ 0.392079] f4ca9f68: 000000001dc1ce68 (0x1dc1ce68) [ 0.392080] f4ca9f6c: 00000000fc816a87 (0xfc816a87) [ 0.392081] f4ca9f70: 0000000001020800 (0x1020800) [ 0.392083] f4ca9f74: 000000003e54bb16 (0x3e54bb16) [ 0.392084] f4ca9f78: 00000000f4ca9f98 (0xf4ca9f98) [ 0.392086] f4ca9f7c: 00000000c402d216 (start_secondary+0x176/0x1c0) [ 0.392088] f4ca9f80: 000000003e54bb16 (0x3e54bb16) [ 0.392089] f4ca9f84: 00000000cfe53ead (0xcfe53ead) [ 0.392090] f4ca9f88: 000000000a810020 (0xa810020) [ 0.392091] f4ca9f8c: 0000000000046210 (0x46210) [ 0.392092] f4ca9f90: 0000000000000000 ... [ 0.392094] f4ca9f94: 00000000f4ca9fac (0xf4ca9fac) [ 0.392095] f4ca9f98: 0000000000000000 ... [ 0.392097] f4ca9f9c: 00000000c4000237 (startup_32_smp+0x16b/0x16d) [ 0.392098] f4ca9fa0: 0000000000200002 (0x200002) [ 0.392099] f4ca9fa4: 0000000000000000 ... [ 0.392101] f4ca9fa8: 00000000c4000237 (startup_32_smp+0x16b/0x16d) [ 0.392102] f4ca9fac: 0000000000000000 ... [ 0.392103] f4ca9ff4: 0000000002008070 (0x2008070) [ 0.392104] f4ca9ff8: 0000000000200000 (0x200000) [ 0.392106] f4ca9ffc: 000000004398000c (0x4398000c) [ 2.368034] pci 0000:00:1d.7: EHCI: BIOS handoff failed (BIOS bug?) 01010001 [ 2.368388] PCI: CLS 64 bytes, default 64 [ 2.370561] workingset: timestamp_bits=30 max_order=20 bucket_order=0 [ 2.371741] Installing knfsd (copyright (C) 1996 o...@monad.swb.de). [ 2.372041] ntfs: driver 2.1.32 [Flags: R/W]. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
.config.gz
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signature.asc
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