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Date:      Tue, 09 Apr 2002 22:07:53 -0400 (EDT)
From:      John Baldwin <jhb@FreeBSD.org>
To:        Brian Somers <brian@freebsd-services.com>
Cc:        cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org, Brian Somers <brian@FreeBSD.org>
Subject:   Re: cvs commit: src/sys/kern kern_linker.c
Message-ID:  <XFMail.20020409220753.jhb@FreeBSD.org>
In-Reply-To: <200204100116.g3A1GZOF004892@hak.lan.Awfulhak.org>

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On 10-Apr-2002 Brian Somers wrote:
>> brian       2002/04/09 18:14:45 PDT
>> 
>>   Modified files:
>>     sys/kern             kern_linker.c 
>>   Log:
>>   In linker_load_module(), check that rootdev != NODEV before calling
>>   linker_search_module().
>>   
>>   Without this, modules loaded from loader.conf that then try to load
>>   in additional modules (such as digi.ko loading a card's BIOS) die
>>   badly in the vn_open() called from linker_search_module().
>>   
>>   It may be worth checking (KASSERTing?) that rootdev != NODEV in
>>   vn_open() too.
>>   
>>   Revision  Changes    Path
>>   1.88      +5 -3      src/sys/kern/kern_linker.c
> 
> After these changes, it's possible for digi to find it's BIOS/FEPOS
> from one of the digi_* modules at boot time - as long as that
> digi_* module is already available (either built into the kernel or
> ``loaded'' at boot time).  However, digi fails to initialise the
> card - I think due to tsleep failing... but I'm not sure yet. 

tsleep/wakeup don't work during the boot device probe.  More
specifically, interrupt handlers don't run, so you will never get woken
up.  Also, since timeouts aren't working yet the tsleep() won't timeout
either.  Thus, if you try to tsleep() during this time period, tsleep()
will return immediately.

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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