Re: [patch] pci: revert "PCI: remove transparent bridge sizing" | KernelTrap

Re: [patch] pci: revert "PCI: remove transparent bridge sizing"

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From: Linus Torvalds <torvalds@...>

To: Benjamin Herrenschmidt <benh@...>

Cc: Ingo Molnar <mingo@...>, Ivan Kokshaysky <ink@...>, Gary Hade <garyhade@...>, Thomas Meyer <thomas@...>, Stefan Richter <stefanr@...>, Thomas Gleixner <tglx@...>, Rafael J. Wysocki <rjw@...>, LKML <linux-kernel@...>, Adrian Bunk <bunk@...>, Andrew Morton <akpm@...>, Natalie Protasevich <protasnb@...>, <pm@...>

Subject: Re: [patch] pci: revert "PCI: remove transparent bridge sizing"

Date: Wednesday, March 26, 2008 - 6:47 pm

On Thu, 27 Mar 2008, Benjamin Herrenschmidt wrote:
quoted text> 
> I was talking about IO not memory mostly here.

Yeah, low IO is also reserved on PC's (the low 256 IO ports are 
motherboard resources and contain stuff like legacy DMA channel setup 
etc).

You could imagine having it behind a PCI bridge, but in practice it's 
always on the NB/SB (and if you want to support some of the odder things 
like the NMI reason and the i387 error ports, they pretty much have to 
be - it would be insane to make a special PCI chips on a separate bus 
that does things like that).

			Linus
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Messages in current thread:

2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Fri Mar 21, 9:59 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Linus Torvalds, (Mon Mar 31, 2:21 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Mark Lord, (Mon Mar 31, 3:29 pm)

2.6.25-rc7/8: Another resume regression, Mark Lord, (Thu Apr 3, 3:06 pm)

Re: 2.6.25-rc7/8: Another resume regression, Mark Lord, (Fri Apr 4, 10:27 pm)

Re: 2.6.25-rc7/8: Another resume regression, Rafael J. Wysocki, (Mon Apr 7, 6:51 am)

Re: 2.6.25-rc7/8: Another resume regression, Mark Lord, (Mon Apr 7, 11:51 am)

Re: 2.6.25-rc7/8: Another resume regression, Rafael J. Wysocki, (Mon Apr 7, 1:40 pm)

Re: 2.6.25-rc7/8: Another resume regression, Mark Lord, (Tue Apr 8, 11:35 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Tino Keitel, (Mon Mar 31, 5:04 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Tino Keitel, (Mon Mar 31, 5:26 pm)

ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reporte..., Stefan Richter, (Sat Mar 22, 12:34 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Sat Mar 22, 1:24 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 2:27 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 3:02 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Sat Mar 22, 5:33 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Gleixner, (Sat Mar 22, 5:58 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Sat Mar 22, 7:01 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Mon Mar 24, 3:58 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Mon Mar 24, 4:50 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Mon Mar 24, 5:24 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Mon Mar 24, 5:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 3:31 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 12:50 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 2:32 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 4:11 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 5:02 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Tue Mar 25, 4:29 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 5:08 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Tue Mar 25, 5:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Tue Mar 25, 6:02 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ivan Kokshaysky, (Wed Mar 26, 6:14 am)

[patch] pci: revert "PCI: remove transparent bridge sizing", Ingo Molnar, (Wed Mar 26, 9:54 am)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Thomas Meyer, (Wed Mar 26, 1:45 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Wed Mar 26, 2:07 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 2:33 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Wed Mar 26, 4:30 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 4:46 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Wed Mar 26, 4:58 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 5:41 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Wed Mar 26, 7:29 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 7:45 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 7:43 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Thu Mar 27, 1:12 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Thu Mar 27, 6:18 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Fri Mar 28, 3:24 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Gary Hade, (Fri Mar 28, 4:46 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ivan Kokshaysky, (Sun Mar 30, 11:44 am)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Thu Mar 27, 6:34 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 5:57 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 6:31 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Alan Cox, (Wed Mar 26, 6:47 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 7:17 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ingo Molnar, (Wed Mar 26, 6:10 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 6:29 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Linus Torvalds, (Wed Mar 26, 6:47 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 6:54 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 7:18 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ingo Molnar, (Wed Mar 26, 6:30 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Alan Cox, (Wed Mar 26, 6:07 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Benjamin Herrenschmidt, (Wed Mar 26, 6:27 pm)

Re: [patch] pci: revert "PCI: remove transparent bridge sizi..., Ingo Molnar, (Wed Mar 26, 5:29 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Wed Mar 26, 8:17 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ivan Kokshaysky, (Wed Mar 26, 7:12 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Tue Mar 25, 1:06 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 7:50 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Sun Mar 23, 2:35 am)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Mon Mar 24, 3:34 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Ingo Molnar, (Mon Mar 24, 3:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Thomas Meyer, (Mon Mar 24, 4:17 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Linus Torvalds, (Mon Mar 24, 4:47 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Tue Mar 25, 11:39 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Wed Mar 26, 7:25 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., H. Peter Anvin, (Sat Mar 22, 5:59 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Sat Mar 22, 7:28 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., H. Peter Anvin, (Sat Mar 22, 7:31 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Sat Mar 22, 10:00 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., H. Peter Anvin, (Sat Mar 22, 10:39 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Sat Mar 22, 11:30 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Stefan Richter, (Sat Mar 22, 6:27 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Tue Mar 25, 7:33 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Yinghai Lu, (Tue Mar 25, 8:03 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Benjamin Herrenschmidt, (Tue Mar 25, 8:12 pm)

Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Rep..., Rafael J. Wysocki, (Sat Mar 22, 1:58 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Jeff Garzik, (Fri Mar 21, 10:52 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ingo Molnar, (Sat Mar 22, 7:11 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ray Lee, (Wed Mar 26, 12:30 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Romano Giannetti, (Thu Mar 27, 6:18 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ray Lee, (Thu Mar 27, 10:43 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Wed Mar 26, 6:11 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Adrian Bunk, (Wed Mar 26, 1:02 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Alan Cox, (Sun Mar 23, 8:57 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Heiko Carstens, (Sat Mar 22, 12:32 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Sat Mar 22, 1:56 pm)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Andrew Morton, (Sat Mar 22, 1:33 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Ingo Molnar, (Sat Mar 22, 7:15 am)

Re: 2.6.25-rc6-git6: Reported regressions from 2.6.24, Rafael J. Wysocki, (Sat Mar 22, 1:53 pm)

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