Messages in this thread |  | | Date | Mon, 08 Oct 2001 16:18:25 -0700 | From | Petko Manolov <> | Subject | Re: discontig physical memory |
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I already did that. I fixed MAX_DMA_ADDRESS and the kernel now reports:
zone(0): 1024 pages zone(1): 7168 pages /* this should be 4096 */ ...
Which is not true as we have a gap between 4 - 16MB phys memory. I also played with add_memory_region(), but the kernel still think we have 32MB ram instead of 20MB as is the case.
Also it lock solid in __get_free_pages in mem_init() Probably this is related to zone(1) wrong assumption right?
best, Petko
"David S. Miller" wrote: > > From: Petko Manolov <pmanolov@Lnxw.COM> > Date: Mon, 08 Oct 2001 15:54:30 -0700 > > Any ideas how to make lowest 4MB allocatable throu > kmalloc(size, GFP_DMA) without breaking the kernel? > > Setup ZONE_DMA correctly at boot time. > > See the code around the free_area_init() call in > arch/i386/mm/init.c for an example of how to do this. > Intel does it for the low 16MB, you would just do it > for the low 4MB. > > Franks a lot, > David S. Miller > davem@redhat.com - 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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