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SubjectRe: [patch] voluntary-preempt-2.6.8-rc3-O4
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On Mon, 2004-08-09 at 22:06, Lee Revell wrote:

> Same results here, the mlockall problem is not fixed by -O4:

Correction, those traces did not involve mlockall at all, but
kmap_atomic and get_user_pages.

Here is another one I got starting jackd. Never seen it before today.

(jackd/778): 14583us non-preemptible critical section violated 1100 us preempt threshold starting at schedule+0x55/0x5a0 and ending at schedule+0x2ed/0x5a0
[<c0106717>] dump_stack+0x17/0x20
[<c0113eec>] dec_preempt_count+0x3c/0x50
[<c0264d4d>] schedule+0x2ed/0x5a0
[<c026554e>] schedule_timeout+0x9e/0xa0
[<c0121dcf>] sys_rt_sigtimedwait+0x1df/0x2e0
[<c01060b7>] syscall_call+0x7/0xb
ALSA /home/rlrevell/cvs/alsa/alsa-driver/alsa-kernel/core/pcm_lib.c:139: XRUN: pcmC0D2c
[<c0106717>] dump_stack+0x17/0x20
[<de93664b>] snd_pcm_period_elapsed+0x27b/0x3e0 [snd_pcm]
[<de9571d1>] snd_emu10k1_interrupt+0xd1/0x3c0 [snd_emu10k1]
[<c011a7d3>] generic_handle_IRQ_event+0x33/0x60
[<c01079c2>] do_IRQ+0xb2/0x180
[<c01062d8>] common_interrupt+0x18/0x20

Lee

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