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Date: Mon, 19 Sep 2005 17:56:30 -0600
From: Scott Long <scottl@samsco.org>
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To: "M. Warner Losh" <imp@bsdimp.com>
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, ru@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/dev/ed if_ed.c if_ed_pccard.c if_edvar.h
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M. Warner Losh wrote:
> In message: <432ED22E.5010005@samsco.org>
>             Scott Long <scottl@samsco.org> writes:
> : Ruslan Ermilov wrote:
> : > On Mon, Sep 19, 2005 at 08:31:11AM -0600, M. Warner Losh wrote:
> : > 
> : >>In message: <20050919054051.GB65954@ip.net.ua>
> : >>            Ruslan Ermilov <ru@freebsd.org> writes:
> : >>: About the commonality...  Usually foo_stop() (which is called first in
> : >>: foo_detach() if you were talking about the detach) disables interrupts,
> : >>: so foo_intr() doesn't usually happen.  From reading the code, I see the
> : >>: same holds true for ed(4).
> : >>
> : >>Wrong.  Foo_intr() does still happen because other devices can
> : >>generate interrupts...
> : >>
> : > 
> : > Ah, you're right, I missed this bit.  :-)
> : > 
> : 
> : Shared interrupts are only slightly less of an abomination as shared 
> : ithreads =-)
> 
> Sadly, shared interrupts are a fact of life in the x86 world.  And
> on platforms that support pci to pccard/cardbus bridges, there will
> always be sharing of interrupts due to the architecture of the YENTA
> bridges...
> 
> Warner

Luckily Express Card (or whatever they decided to call it this week) 
will make this obsolete over time.

Scott