Re: [BUG] Strange 1-second pauses during Resume-from-RAM

Ingo Molnar
2007-12-01T20:55:35Z

* J??rn Engel <joern@logfs.org> wrote:

> Almost. "-serial stdio" was missing. Much better now.
>
> stopped custom tracer.
> BUG: spinlock recursion on CPU#0, sh/953
> lock: c030f280, .magic: dead4ead, .owner: sh/953, .owner_cpu: 0
> Pid: 953, comm: sh Not tainted 2.6.24-rc3-ge1cca7e8-dirty #2
> [<c0103a04>] show_trace_log_lvl+0x35/0x54
> [<c010450a>] show_trace+0x2c/0x2e
> [<c0104e6d>] dump_stack+0x84/0x8a
> [<c01ded7c>] spin_bug+0xa7/0xae
> [<c01def14>] _raw_spin_lock+0x45/0xfa
> [<c02a02b1>] _spin_lock_irqsave+0x68/0x7a
> [<c01087e7>] pit_read+0x14/0x99
> [<c0130ee9>] get_monotonic_cycles+0xf/0x2d

ah. You should mark pit_read() function as notrace. PIT clocksource is
rare. (add the 'notrace' word to the function prototype)

Ingo