Messages in this thread | | | Date | Sun, 2 Sep 2001 16:15:50 +0100 | From | Russell King <> | Subject | Re: pci_alloc_consistent for small allocations? |
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On Sun, Sep 02, 2001 at 08:08:00AM -0700, Adam J. Richter wrote: > In looking at the ieee1394 OHCI driver, I noticed that it > appears to make 104 calls to pci_alloc_consistent for data structures > that are 16 or 64 bytes. Currently, on x86, pci_alloc_consistent > allocates at least one full page per call, so it looks like the > ohci1394 driver allocates 416kB per controller as a result of these > data structures.
You might want to look through the PCI stuff in drivers/pci - there's a generic method for handling this on USB already.
-- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html
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