Messages in this thread | | | Date | Fri, 19 Oct 2001 23:59:51 +0200 | From | Ralf Baechle <> | Subject | Re: pci_alloc_consistent question |
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On Fri, Oct 19, 2001 at 03:24:14PM -0600, MEHTA,HIREN (A-SanJose,ex1) wrote:
> so, what is the conservative number ? 1MB ?
Even far below that. Most systems will allocate that memory using get_free_pages and by allocating large pages such as 1mb you'll produce high memory pressure. Try to get away with PAGE_SIZE * 2 if you can. Large allocation are only ok if they're rare.
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