Re: consequences of lowering "MAX_LOW_MEM"?

From: Benjamin Herrenschmidt (benh@kernel.crashing.org)
Date: Tue Sep 03 2002 - 15:28:23 EST


>I think you'll find yourself with no virtual address space left to
>do vmalloc / fixmap / kmap type stuff. Or at least you would on i386,
>I presume it's the same for ppc. Sounds like you may have left
>yourself enough space for fixmap & kmap, but any calls to vmalloc
>will probably fail ?

Yes, same problem on PPC, you'll run out of virtual space quite
quickly for vmalloc and ioremap. Stuff a video board with lots
of VRAM or any PCI card exposing large MMIO regions into your
machines and it will probably not even boot.

Ben.

-
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/



This archive was generated by hypermail 2b29 : Sat Sep 07 2002 - 22:00:22 EST