Re: [PULL]: please pull changes for tip/cpus4096

[Ingo Molnar]

* Mike Travis <travis@xxxxxxx> wrote:

> Hi Ingo,
> 
> This is the same as the previous pull request except that I added 
> Yinghai's vast improvement to probing for nr_irqs.  Big difference in 
> runtime memory allocated.

before moving on, we first need to fix all pending regressions. Such as 
some MAXSMP fallout from the cpufreq changes:

[   32.937027] calling  acpi_cpufreq_init+0x0/0x100 @ 1
[   32.942203] BUG: unable to handle kernel NULL pointer dereference at (null)
[   32.946003] IP: [<ffffffff80222521>] get_cur_val+0xcc/0x106
[   32.946003] PGD 0 
[   32.946003] Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
[   32.946003] last sysfs file: 
[   32.946003] CPU 1 
[   32.946003] Pid: 1, comm: swapper Tainted: G        W  2.6.29-rc1-00190-g37a76bd #10
[   32.946003] RIP: 0010:[<ffffffff80222521>]  [<ffffffff80222521>] get_cur_val+0xcc/0x106
[   32.946003] RSP: 0018:ffff88003f977b80  EFLAGS: 00010202
[   32.946003] RAX: 0000000000000001 RBX: ffff8800029c8c80 RCX: 0000000000000008
[   32.946003] RDX: 0000000000000000 RSI: ffffffff80ce0100 RDI: 0000000000000000
[   32.946003] RBP: ffff88003f977bd0 R08: 0000000000000004 R09: 0000000000000040
[   32.946003] R10: 0000000000000060 R11: 0000000081363fa8 R12: ffffffff81c4f0e0
[   32.946003] R13: ffffffff80ce0100 R14: ffff88003c888a00 R15: 0000000000000000
[   32.946003] FS:  0000000000000000(0000) GS:ffff88003f802c00(0000) knlGS:0000000000000000
[   32.946003] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[   32.946003] CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0
[   32.946003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   32.946003] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[   32.946003] Process swapper (pid: 1, threadinfo ffff88003f976000, task ffff88003f978000)
[   32.946003] Stack:
[   32.946003]  0000000000000202 0000000000000002 0000000000000001 0000000000000000
[   32.946003]  0000000000000198 0000000000000002 0000000000000000 00000000002ca5b0
[   32.946003]  0000000000000000 ffff88003e5533e0 ffff88003f977c00 ffffffff802225e3
[   32.946003] Call Trace:
[   32.946003]  [<ffffffff802225e3>] get_cur_freq_on_cpu+0x88/0xd9
[   32.946003]  [<ffffffff80222ea9>] acpi_cpufreq_cpu_init+0x3ed/0x530
[   32.946003]  [<ffffffff80ac2d41>] cpufreq_add_dev+0x1bb/0x6dd
[   32.946003]  [<ffffffff8026fd0e>] ? trace_hardirqs_on+0xd/0xf
[   32.946003]  [<ffffffff8026fbcd>] ? trace_hardirqs_on_caller+0x1f/0x153
[   32.946003]  [<ffffffff8026fd0e>] ? trace_hardirqs_on+0xd/0xf
[   32.946003]  [<ffffffff80ccbc77>] ? mutex_lock_nested+0x2b0/0x2d3
[   32.946003]  [<ffffffff8026fbcd>] ? trace_hardirqs_on_caller+0x1f/0x153
[   32.946003]  [<ffffffff80ccbc8b>] ? mutex_lock_nested+0x2c4/0x2d3
[   32.946003]  [<ffffffff805fd81d>] ? sysdev_driver_register+0x7c/0x11a
[   32.946003]  [<ffffffff805fd81d>] ? sysdev_driver_register+0x7c/0x11a

which triggers with latest -git with the attached config, and fixed by the 
commit below..

	Ingo

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