Date: Tue, 17 Jun 2003 13:03:52 +0200 From: Wiktor Niesiobedzki <w@evip.pl> To: Jeff Roberson <jroberson@chesapeake.net> Cc: current@freebsd.org Subject: Re: ULE nice bugs are fixed. Message-ID: <20030617110352.GB395@mail.evip.pl> In-Reply-To: <20030617025136.X36168-100000@mail.chesapeake.net> References: <20030616215340.GA395@mail.evip.pl> <20030617025136.X36168-100000@mail.chesapeake.net>
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On Tue, Jun 17, 2003 at 02:53:36AM -0400, Jeff Roberson wrote:
> > I'm seeing quite similar panic, when I do renice to lower (negative) value:
> > ("Negative nice count.")
> >
> > (kgdb) bt
> > #0 doadump () at ../../../kern/kern_shutdown.c:240
> > #1 0xc018b374 in boot (howto=260) at ../../../kern/kern_shutdown.c:372
> > #2 0xc018b6aa in panic () at ../../../kern/kern_shutdown.c:545
> > #3 0xc01926a3 in mi_switch () at ../../../kern/kern_synch.c:481
> > #4 0xc018b022 in boot (howto=256) at ../../../kern/kern_shutdown.c:312
> > #5 0xc018b6aa in panic () at ../../../kern/kern_shutdown.c:545
> > #6 0xc019dbe8 in kseq_nice_rem (kseq=0xc0312be0, nice=-10) at ../../../kern/sched_ule.c:324
> > #7 0xc019e2b5 in sched_nice (kg=0xfffffff6, nice=-20) at ../../../kern/sched_ule.c:809
> > #8 0xc0188eac in donice (td=0xc25fc850, p=0xc26c0790, n=-20) at ../../../kern/kern_resource.c:296
> > #9 0xc0188b43 in setpriority (td=0xc25fc850, uap=0xcdd65d14) at ../../../kern/kern_resource.c:205
> > #10 0xc0298b11 in syscall (frame=
> > {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 87, tf_esi = -10, tf_ebp = -1077937064, tf_isp = -841589388, tf_ebx = -20, tf_edx = 0, tf_ecx = -1077937080, tf_eax = 96, tf_trapno = 12, tf_err = 2, tf_eip = 671874691, tf_cs = 31, tf_eflags = 659, tf_esp = -1077937108, tf_ss = 47}) at ../../../i386/i386/trap.c:1023
> > #11 0xc0288d9d in Xint0x80_syscall () at {standard input}:138
> > ---Can't read userspace from dump, or kernel process---
> >
> > The sources are from today. I also noticed, that 5.1-BETA (build around 9th of
> > May) is working correctly.
> >
> > Also: I've noticed a strange behaviour - if I do nice -n -15 some_prog, it
> > will get a nice of -10, and similiar with any other nice values (it +5 from
> > what it suposed to be).
> >
>
> I shouldn't have spoke so soon. I am not able to reproduce this. Is it
> on SMP or UP? Are you using either libthr or libkse? If you're not sure
> what I'm talking about, you're using neither of them.
Machine is UP (Athlon XP 1600). Currently, I use libc_r.
>
> Is there anything unusual about your environment? What are you using to
> read the nice values?
My simple test, is to do following:
boot into single mode
nice -n -15 sleep 300 &
I use ps -l to get nice level.
renice -n -20 [pid of the sleep process] cause the panic.
Previously I was using CPUTYPE=athlon-xp to build the kernel, but after
switching to i686 the panic persists.
I'm attaching the full backtrace and result of call kseq_print(0).
Cheers,
Wiktor Niesiobedzki
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