Messages in this thread | | | Subject | Re: preempt-timing-2.6.8-rc1 | From | Lee Revell <> | Date | Mon, 26 Jul 2004 04:29:34 -0400 |
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On Mon, 2004-07-26 at 04:23, Ingo Molnar wrote: > * Lee Revell <rlrevell@joe-job.com> wrote: > > > Here is another one: > > > > Jul 25 18:46:18 mindpipe kernel: 11ms non-preemptible critical section violated 1 ms preempt threshold starting at kmap_atomic+0x10/0x60 and ending at kunmap_atomic+0x8/0x20 > > > Jul 25 18:46:18 mindpipe kernel: [do_no_page+78/784] do_no_page+0x4e/0x310 > > Jul 25 18:46:18 mindpipe kernel: [handle_mm_fault+193/368] handle_mm_fault+0xc1/0x170 > > Jul 25 18:46:18 mindpipe kernel: [get_user_pages+288/944] get_user_pages+0x120/0x3b0 > > Jul 25 18:46:18 mindpipe kernel: [make_pages_present+104/144] make_pages_present+0x68/0x90 > > Jul 25 18:46:18 mindpipe kernel: [do_mmap_pgoff+998/1568] do_mmap_pgoff+0x3e6/0x620 > > Jul 25 18:46:18 mindpipe kernel: [sys_mmap2+118/176] sys_mmap2+0x76/0xb0 > > Jul 25 18:46:18 mindpipe kernel: [syscall_call+7/11] syscall_call+0x7/0xb > > is this an mmap(MAP_LOCKED) instance [or a process doing an mmap() after > having done an mlockall()]? I'll take a look. >
Yes, jackd does exactly this, mlockall then opens the ALSA driver with mmap.
Lee
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