Re: [Jackit-devel] Re: [patch] voluntary-preempt-2.6.8-rc3-O5

Lee Revell
2004-08-13T01:16:40Z

On Thu, 2004-08-12 at 20:55, Florian Schmidt wrote:
> I think many of the jackd xruns are really jacks business. But maybe i
> misinterpret the symptom.
>

I also get this one with apt-get dist-upgrade:

(dpkg/11902): 444us [0 jiffy] non-preemptible critical section violated
300 us preempt threshold starting at copy_mm+0x31b/0x3f0 and ending at
copy_page_range+0x144/0x290
[<c0106497>] dump_stack+0x17/0x20
[<c0113dc2>] touch_preempt_timing+0x32/0x40
[<c013b7b4>] copy_page_range+0x144/0x290
[<c0114922>] copy_mm+0x362/0x3f0
[<c0115243>] copy_process+0x3d3/0xb60
[<c0115a11>] do_fork+0x41/0x1b3
[<c01049b9>] sys_clone+0x29/0x30
[<c0105e57>] syscall_call+0x7/0xb

Shouldn't fork()'ing a dpkg process be a lot faster than that, with
copy-on-write etc?

Lee