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* [Fwd: RE: cciss patches for 2.4.21-rc1, 4 of 4]
@ 2003-04-25 14:29 Arjan van de Ven
  0 siblings, 0 replies; only message in thread
From: Arjan van de Ven @ 2003-04-25 14:29 UTC (permalink / raw)
  To: Alan Cox; +Cc: Cameron, Steve, Linux Kernel Mailing List

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-----Forwarded Message-----

> From: Alan Cox <>
> To: "Miller, Mike (OS Dev)" <>
> Cc: "Cameron, Steve" <>, Linux Kernel Mailing List <>
> Subject: RE: cciss patches for 2.4.21-rc1, 4 of 4
> Date: 25 Apr 2003 14:09:53 +0100
> On Gwe, 2003-04-25 at 14:48, Miller, Mike (OS Dev) wrote:
> > I haven't seen any issues (yet) on ia64. I'm running with 5GB RAM.
> That doesn't make it correct. This same problem occurs in other drivers
> and the usual trick is to set the pci mask to 32bit, allocate those
> command buffers ready, then flip back to 64bit. Just be sure one thread
> doesn't change it to 64bit while another is allocating commands. The
> reverse is fine since an accidental odd bounce is no big deal

except that pci_alloc_consistent is guaranteed to return a 32 bit address

what you're thinking about is the mapping interface instead.

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2003-04-25 14:29 [Fwd: RE: cciss patches for 2.4.21-rc1, 4 of 4] Arjan van de Ven

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