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Date: Tue, 30 Jan 2007 07:54:57 +0100 From: Ingo Molnar <mingo@...e.hu> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Stephen Hemminger <shemminger@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Jeff Garzik <jeff@...zik.org> Subject: Re: Linux 2.6.20-rc6 - sky2 resume breakage * Linus Torvalds <torvalds@...ux-foundation.org> wrote: > On Mon, 29 Jan 2007, Stephen Hemminger wrote: > > > > On one and only one platform. It works fine on others. Don't blame > > the driver, stop it in PCI. > > How sure are you that it's only those Sony laptops? i'm wondering, could we go with Thomas' temporary patch that disables sky2 MSI if CONFIG_PM is enabled - we could revert that after 2.6.20. It's not like MSI is a life and death feature. On IO-APIC systems vectors are abundant and in any case we share irqs just fine. The true advantage of MSI is minimal. (MSI-X has the potential to be better by being message based, but in reality it still goes through the full IRQ layer.) MSI might be useful on really, really large systems - but i really hope those really large systems dont rely on CONFIG_PM. Meanwhile Thomas' patch maximizes the amount of working hardware (it has the chance to produce working systems in 100% of the cases) - which is a few orders of magnitude more important than IRQ management micro-costs. Am i missing anything? Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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