Messages in this thread |  | | Date | Fri, 19 Oct 2001 17:37:45 -0400 | From | Jeff Garzik <> | Subject | Re: pci_alloc_consistent question |
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"MEHTA,HIREN (A-SanJose,ex1)" wrote: > so, what is the conservative number ? 1MB ?
FWIW, if you need more than 1-4MB, you can use alloc_bootmem at system boot to reserve huge amounts of contiguous memory... (not that anything but lame hardware requires that anymore)
> -----Original Message----- > On Fri, Oct 19, 2001 at 12:32:19PM -0600, MEHTA,HIREN (A-SanJose,ex1) wrote: > > > Is there any limitation on the amount of contiguous dmaable memory that > > can be allocated using a single call to pci_alloc_consistent() ? > > Entirely platform dependant. On some systems the total available DMA memory > for DMA may be as limited as 1mb, others have limits like 16mb yet other can > support the entire 32-bit address space for DMA. So in case of doubt be > conservative.
-- Jeff Garzik | Only so many songs can be sung Building 1024 | with two lips, two lungs, and one tongue. MandrakeSoft | - nomeansno - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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