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Date: Thu, 19 Jan 2006 22:01:05 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Julian Elischer <julian@elischer.org>
Message-ID: <20060120030105.GA5286@xor.obsecurity.org>
References: <43D05151.5070409@elischer.org>
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Cc: current@freebsd.org
Subject: Re: kernel thread as real threads..
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On Thu, Jan 19, 2006 at 06:56:17PM -0800, Julian Elischer wrote:
>=20
> some progrsss..
> as the first few lines show, it's not quite perfect yet but it's most of=
=20
> the way there..
> (Like proc 1 isn't init)
>=20
> SMP: AP CPU #1 Launched!
> SMP: AP CPU #2 Launched!
> SMP: AP CPU #3 Launched!
> panic: blockable sleep lock (sleep mutex) buffer daemon lock @=20
> /usr/src/sys/kern/vfs_bio.c:2048
> cpuid =3D 2
> KDB: enter: panic
> [thread pid 0 tid 100051 ]
> Stopped at      kdb_enter+0x2b: nop   =20
> db> ps
>  pid   proc     uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
>    1 c7cb1000    0     0     0 0000200 [SLPQ g_waitidle=20
> 0xc07239ec][SLP] swapper
>    0 c0723c40    0     0     0 0000288 (threaded)  swapper
>   thread 0xc7d6a340 ksegrp 0xc7cb0960 [RUNQ] schedcpu
>   thread 0xc7d6a4e0 ksegrp 0xc7cb09c0 [RUNQ] nfsiod 3

What about that threads don't show CPU usage or accumulate CPU time?
This is annoying enough for user threads but would be a pretty serious
usability limitation if it happened for kernel threads too.

Kris

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