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Date:      Wed, 16 May 2001 15:19:38 -0700 (PDT)
From:      John Baldwin <jhb@FreeBSD.org>
To:        Matthew Jacob <mjacob@feral.com>
Cc:        current@FreeBSD.org, Bob Bishop <rb@gid.co.uk>
Subject:   RE: panic: sleeping process owns a mutex
Message-ID:  <XFMail.010516151938.jhb@FreeBSD.org>
In-Reply-To: <Pine.BSF.4.21.0105160955120.8660-100000@beppo.feral.com>

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On 16-May-01 Matthew Jacob wrote:
> 
> Oh, I'd like you to think twice about this. Massive amounts of driver
> rototilling should be avoided at this point.

Well, it's causing panics in some cases.  Those are bad.  Basically I would be
reverting earlier changes.

> On Wed, 16 May 2001, John Baldwin wrote:
> 
>> 
>> On 16-May-01 Bob Bishop wrote:
>> > Hi,
>> > 
>> > This while building world, with a kernel cvsup at Fri Apr 27 04:06:40 BST
>> > 2001
>> > 
>> > kern/kern_synch.c:386 sleeping with "vr0" locked from pci/if_vr.c:1315
>> > 
>> > abridged backtrace:
>> > 
>> > panic()
>> > propagate_priority()
>> > _mtx_lock_sleep()
>> > vr_intr()
>> > ithread_loop()
>> > fork_exit()
>> > fork_trampoline()
>> 
>> Well, I think the best thing to do for now will be to back out all the
>> ethernet
>> driver locking until we figure out how we are actually going to lock them.
>> The original locks that went in starting with fxp many months ago weren't
>> quite
>> right but have been mostly harmless up to this point.   There are some cases
>> where we sleep with locks however, which can lead to problems.
>> 
>> -- 
>> 
>> John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
>> PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
>> "Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/
>> 
>> To Unsubscribe: send mail to majordomo@FreeBSD.org
>> with "unsubscribe freebsd-current" in the body of the message
>> 
> 

-- 

John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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