Date: Sun, 04 Mar 2001 15:20:37 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: The Hermit Hacker <scrappy@hub.org> Cc: current@FreeBSD.org, Alex Zepeda <jazepeda@pacbell.net> Subject: Re: More on system hangs ... IRQ related? Message-ID: <XFMail.010304152037.jhb@FreeBSD.org> In-Reply-To: <Pine.BSF.4.33.0103041909510.33622-100000@mobile.hub.org>
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On 04-Mar-01 The Hermit Hacker wrote:
> On Sun, 4 Mar 2001, Alex Zepeda wrote:
>
>> On Sun, Mar 04, 2001 at 03:18:39PM -0400, The Hermit Hacker wrote:
>>
>> > My sound card overlaps with fxp0, and fxp1 overlaps with the
>> > HighPoint controller ...
>> >
>> > Grasping at straws here ...
>>
>> Ditch the HPT366, it's crap and will cause system instabilities with
>> "fast" hard drives. I'm not sure what you have attached to it, but I've
>> had problems with {either,both} an IBM ATA100 HDD and a Western Digital
>> ATA66 drive attached. Apparently the ATA100 counterpart from HighPoint
>> isn't so bad.
>
> Okay, everything in my box is SCSI, so I'm not suspecting the HPT... its
> more the pcm & fxp that I'm thinking ...
>
> how does the OS handle having both devices hit simultaneously on the same
> IRQ?
The IRQ fires and is masked. We then run both handlers, one after the other,
and when they have finished re-enable the IRQ.
--
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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