On Wed, 2010-12-22 at 02:27 -0800, Kevin D. Kissell wrote: > > Sorry I misunderstood file. git blame shows that "andi" is around for > quite > > some time. > > I've never used git blame, so I don't know how far it can be trusted, > but if that change was made in 2006, that would predate the major > breakage by several > years. So my suggestion from yesterday is a reasonable one: That change is present in booting 2.6.32 kernel.Corresponding patch can be found in gitweb . http://git.linux-mips.org/?p=linux.git;a=commitdiff;h=41c594ab65fc89573af296d192aa5235d09717ab#patch39 > > > I think that if you were to tweak mips-mt.c at line 103 to change > > the > > > > tcstatval = flags; /* And pre-dump TCStatus is flags */ > > > > to something more like > > > > /* Pre-dump TCStatus Interrupt Inhibit bit is in flags variable */ > > tcstatval = (read_c0_tcstatus() & ~0x400) | flags; > > > > should fix the dump. > > With that patch, if you re-run the experiment of hang-breakout-dump, we > might be able to deduce something. Here is the dump with the patch. [ 0.000000] Calibrating delay loop... === MIPS MT State Dump === [ 0.000000] -- Global State -- [ 0.000000] MVPControl Passed: 00000000 [ 0.000000] MVPControl Read: 00000000 [ 0.000000] MVPConf0 : a8008406 [ 0.000000] -- per-VPE State -- [ 0.000000] VPE 0 [ 0.000000] VPEControl : 00000000 [ 0.000000] VPEConf0 : 800f0003 [ 0.000000] VPE0.Status : 11004001 [ 0.000000] VPE0.EPC : 80100000 _stext+0x0/0x10 [ 0.000000] VPE0.Cause : e080407c [ 0.000000] VPE0.Config7 : 00010000 [ 0.000000] VPE 1 [ 0.000000] VPEControl : 00030000 [ 0.000000] VPEConf0 : 800f0000 [ 0.000000] VPE1.Status : 00407904 [ 0.000000] VPE1.EPC : fffdffff 0xfffdffff [ 0.000000] VPE1.Cause : 4000027c [ 0.000000] VPE1.Config7 : 00010000 [ 0.000000] -- per-TC State -- [ 0.000000] TC 0 (current TC with VPE EPC above) [ 0.000000] TCStatus : 11004001 [ 0.000000] TCBind : 00000000 [ 0.000000] TCRestart : 803fc408 printk+0x10/0x30 [ 0.000000] TCHalt : 00000000 [ 0.000000] TCContext : 00000000 [ 0.000000] TC 1 [ 0.000000] TCStatus : 00000000 [ 0.000000] TCBind : 00200001 [ 0.000000] TCRestart : 3ffffffe 0x3ffffffe [ 0.000000] TCHalt : 00000001 [ 0.000000] TCContext : efffffff [ 0.000000] TC 2 [ 0.000000] TCStatus : 00000000 [ 0.000000] TCBind : 00400001 [ 0.000000] TCRestart : ffffffee 0xffffffee [ 0.000000] TCHalt : 00000001 [ 0.000000] TCContext : efffffbf [ 0.000000] TC 3 [ 0.000000] TCStatus : 00000000 [ 0.000000] TCBind : 00600001 [ 0.000000] TCRestart : ffe00200 0xffe00200 [ 0.000000] TCHalt : 00000001 [ 0.000000] TCContext : 7fffb77f [ 0.000000] TC 4 [ 0.000000] TCStatus : 00000000 [ 0.000000] TCBind : 00800001 [ 0.000000] TCRestart : ffe00200 0xffe00200 [ 0.000000] TCHalt : 00000001 [ 0.000000] TCContext : 7ffdf736 [ 0.000000] TC 5 [ 0.000000] TCStatus : 00000000 [ 0.000000] TCBind : 00a00001 [ 0.000000] TCRestart : ffe00200 0xffe00200 [ 0.000000] TCHalt : 00000001 [ 0.000000] TCContext : ee5ffff7 [ 0.000000] TC 6 [ 0.000000] TCStatus : 00000000 [ 0.000000] TCBind : 00c00001 [ 0.000000] TCRestart : f7ff7ffe 0xf7ff7ffe [ 0.000000] TCHalt : 00000001 [ 0.000000] TCContext : e6fffffb [ 0.000000] Counter Interrupts taken per CPU (TC) [ 0.000000] 0: 0 [ 0.000000] 1: 0 [ 0.000000] Self-IPI invocations: [ 0.000000] 0: 0 [ 0.000000] 1: 0 [ 0.000000] IPIQ[0]: head = 0x0, tail = 0x0, depth = 0 [ 0.000000] IPIQ[1]: head = 0x0, tail = 0x0, depth = 0 [ 0.000000] 0 Recoveries of "stolen" FPU [ 0.000000] =========================== [ 0.010000] === MIPS MT State Dump === [ 0.010000] -- Global State -- [ 0.010000] MVPControl Passed: 00000000 [ 0.010000] MVPControl Read: 00000000 [ 0.010000] MVPConf0 : a8008406 [ 0.010000] -- per-VPE State -- [ 0.010000] VPE 0 [ 0.010000] VPEControl : 00000000 [ 0.010000] VPEConf0 : 800f0003 [ 0.010000] VPE0.Status : 18004000 [ 0.010000] VPE0.EPC : 8010c9b4 mips_mt_regdump+0x3a4/0x3d4 [ 0.010000] VPE0.Cause : 50804000 [ 0.010000] VPE0.Config7 : 00010000 [ 0.010000] VPE 1 [ 0.010000] VPEControl : 00030000 [ 0.010000] VPEConf0 : 800f0000 [ 0.010000] VPE1.Status : 00407904 [ 0.010000] VPE1.EPC : fffdffff 0xfffdffff [ 0.010000] VPE1.Cause : 4000027c [ 0.010000] VPE1.Config7 : 00010000 [ 0.010000] -- per-TC State -- [ 0.010000] TC 0 (current TC with VPE EPC above) [ 0.010000] TCStatus : 18004000 [ 0.010000] TCBind : 00000000 [ 0.010000] TCRestart : 803fc408 printk+0x10/0x30 [ 0.010000] TCHalt : 00000000 [ 0.010000] TCContext : 00000000 [ 0.010000] TC 1 [ 0.010000] TCStatus : 00000000 [ 0.010000] TCBind : 00200001 [ 0.010000] TCRestart : 3ffffffe 0x3ffffffe [ 0.010000] TCHalt : 00000001 [ 0.010000] TCContext : efffffff [ 0.010000] TC 2 [ 0.010000] TCStatus : 00000000 [ 0.010000] TCBind : 00400001 [ 0.010000] TCRestart : ffffffee 0xffffffee [ 0.010000] TCHalt : 00000001 [ 0.010000] TCContext : efffffbf [ 0.010000] TC 3 [ 0.010000] TCStatus : 00000000 [ 0.010000] TCBind : 00600001 [ 0.010000] TCRestart : ffe00200 0xffe00200 [ 0.010000] TCHalt : 00000001 [ 0.010000] TCContext : 7fffb77f [ 0.010000] TC 4 [ 0.010000] TCStatus : 00000000 [ 0.010000] TCBind : 00800001 [ 0.010000] TCRestart : ffe00200 0xffe00200 [ 0.010000] TCHalt : 00000001 [ 0.010000] TCContext : 7ffdf736 [ 0.010000] TC 5 [ 0.010000] TCStatus : 00000000 [ 0.010000] TCBind : 00a00001 [ 0.010000] TCRestart : ffe00200 0xffe00200 [ 0.010000] TCHalt : 00000001 [ 0.010000] TCContext : ee5ffff7 [ 0.010000] TC 6 [ 0.010000] TCStatus : 00000000 [ 0.010000] TCBind : 00c00001 [ 0.010000] TCRestart : f7ff7ffe 0xf7ff7ffe [ 0.010000] TCHalt : 00000001 [ 0.010000] TCContext : e6fffffb [ 0.010000] Counter Interrupts taken per CPU (TC) [ 0.010000] 0: 0 [ 0.010000] 1: 0 [ 0.010000] Self-IPI invocations: [ 0.010000] 0: 0 [ 0.010000] 1: 0 [ 0.010000] IPIQ[0]: head = 0x0, tail = 0x0, depth = 0 [ 0.010000] IPIQ[1]: head = 0x0, tail = 0x0, depth = 0 [ 0.010000] 0 Recoveries of "stolen" FPU [ 0.010000] ===========================
