linux-kernel - Re: [patch, -git] pcie hotplug bootup crash fix

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Message-ID: <20080526085824.GA13529@elte.hu>
Date:	Mon, 26 May 2008 10:58:24 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>, drzeus-list@...eus.cx
Subject: Re: [patch, -git] pcie hotplug bootup crash fix


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Mon, 26 May 2008 10:47:09 +0200 Ingo Molnar <mingo@...e.hu> wrote:
> 
> > 
> > * Kenji Kaneshige <kaneshige.kenji@...fujitsu.com> wrote:
> > 
> > > I updated Ingo's patch. If it's ok, I'll send it to Jess Barnes with 
> > > some other patches for the other pciehp regression problems.
> > 
> > looks good to me, thanks Kenji.
> > 
> 
> It's a bit sad to add a large workaround like this.  I'm surprised 
> that fixing it properly is considered unviable for 2.6.26.  Normally 
> these fixes are pretty simple - just request the IRQ a bit later?

hm, will that solve the problem? These irqs can be shared and there can 
be multiple of them, so making the handlers robust against 
half-constructed global state seems inevitable (the other option would 
be extra locking). But i've only looked briefly ...

	Ingo
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