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SB1 broken on lmo tip

To: linux-mips@linux-mips.org
Subject: SB1 broken on lmo tip
From: "Mark E Mason" <mark.e.mason@broadcom.com>
Date: Wed, 8 Feb 2006 16:49:57 -0800
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
Thread-index: AcYtEr/bSiRQd6srR76aPQRB4ka0cw==
Thread-topic: SB1 broken on lmo tip
Hello,
 
It looks like the following merge broke the SB1 ports in linux-mips.org:
 
        Merge with e3f749c4af69c4344d89f11e2293e3790eb4eaca from Linus.
 
Specifically:
    d166b5a220813a08a79312fc384d11e1c57e9072    works, and it's child
    a7900c9bdb64c11688719bef9f6373fbc4c276ab    does not.

Unfortunately, the diffs between the two are about 19,000 lines...
And they're neighbors, so 'git bisect' will do no good.

The failure mode is the following exceptions on boot (using the
bigsur_defconfig):

294667.532000] Detected 3 available secondary CPU(s)
[4294667.534000] CPU revision is: 03041100
[4294667.534000] FPU revision is: 000f0103
[4294667.534000] Primary instruction cache 32kB, 4-way, linesize 32
bytes.
[4294667.534000] Primary data cache 32kB, 4-way, linesize 32 bytes.
[4294667.534000] Synthesized TLB refill handler (35 instructions).
[4294667.554000] CPU 0 Unable to handle kernel paging request at virtual
address 0000000000000028, epc == ffffffff80129740, 0[4294667.554000]
Oops[#1]:
[4294667.554000] Cpu 0
[4294667.554000] $ 0   : 0000000000000000 ffffffff804552e0
0000000000000020 0000000000000000
[4294667.554000] $ 4   : a8000000043da048 0000000000000000
0000000000000000 0000000000000001
[4294667.554000] $ 8   : ffffffff8045b790 ffffffff8feef420
ffffffff80424108 0000000000000000
[4294667.554000] $12   : ffffffffffffffff ffffffff8026be28
a8000000004ac630 ffffffffffffffff
[4294667.554000] $16   : 0000000000000000 a8000000043da048
a800000003da1300 0000000000000000
[4294667.554000] $20   : 0000000000000000 a800000003da1300
0000000000000001 ffffffff804552e0
[4294667.554000] $24   : 0000000000000000 ffffffff8fe94dc8
[4294667.554000] $28   : a8000000043dc000 a8000000043dfe20
a8000000043dfe30 ffffffff80129bc0
[4294667.554000] Hi    : 0000000000005a99
[4294667.554000] Lo    : 9999999998bf9800
[4294667.554000] epc   : ffffffff80129740 enqueue_task+0x18/0x88     Not
tainted
[4294667.554000] ra    : ffffffff80129bc0 activate_task+0xe0/0x158
[4294667.554000] Status: 14001fe2    KX SX UX KERNEL EXL
[4294667.554000] Cause : 00808008
[4294667.554000] BadVA : 0000000000000028
[4294667.554000] PrId  : 01041100
[4294667.554000] Modules linked in:
[4294667.554000] Process swapper (pid: 1, threadinfo=a8000000043dc000,
task=a8000000043db8a8)
[4294667.554000] Stack : a8000000043dfe30 ffffffff8045aca0
a800000003da1300 ffffffff804552e0
[4294667.554000]         a8000000043da048 0000000000000001
a8000000043dfe60 ffffffff8012ad70
[4294667.554000]         0000000014001fe1 0000000000000000
0000000000000000 0000000000000000
[4294667.554000]         ffffffffffffffff 000000000000000f
0000000000000000 ffffffffffffffff
[4294667.554000]         ffffffff80451b38 0000000000000001
0000000000000001 ffffffff8045b758
[4294667.554000]         0000000000000000 0000000000000000
0000000000000000 0000000000000000
[4294667.554000]         a8000000043dfef0 ffffffff80130bd8
a8000000043f4000 a8000000043f7fe0
[4294667.554000]         ffffffff80451b38 0000000000000001
0000000000000002 ffffffff8045b758
[4294667.554000]         0000000000000000 0000000000000000
0000000000000000 0000000000000000
[4294667.554000]         0000000000000000 ffffffff8014c308
0000000000000001 0000000000000001
[4294667.554000]         ...
[4294667.554000] Call Trace:
[4294667.554000]  [<ffffffff8012ad70>] try_to_wake_up+0x530/0x600
[4294667.554000]  [<ffffffff80130bd8>] migration_call+0x210/0x228
[4294667.554000]  [<ffffffff8014c308>] notifier_call_chain+0x38/0x78
[4294667.554000]  [<ffffffff80435e6c>] cpu_up+0x13c/0x1c8
[4294667.554000]  [<ffffffff80100e90>] init+0x9b0/0xb20
[4294667.554000]  [<ffffffff80100570>] init+0x90/0xb20
[4294667.554000]  [<ffffffff80104fc0>] kernel_thread_helper+0x10/0x18
[4294667.554000]  [<ffffffff80104fb0>] kernel_thread_helper+0x0/0x18
[4294667.554000]
[4294667.554000]
[4294667.554000] Code: 00021138  0045102d  64420020 <dc470008> 64830040
fc430008  fc820040  fc670008  fce30000
[4294667.555000] Kernel panic - not syncing: Attempted to kill init!
[4294667.556000]  <0>Rebooting in 5 seconds..Passing control back to
CFE...

I'm going to start looking into it, but any & all suggestions on where
to look are most welcome.

Cheers,
Mark


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