lkml.org 
[lkml]   [2002]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: consequences of lowering "MAX_LOW_MEM"?
Date
>
>> >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.
>>
>
>Ben,
> But doesn't using Matt's suggestion and moving both MAX_LOW_MEM and
>changing KERNELBASE take care of this? It's an embedded board with no
>video, but it does have one PCI Mezzanine Card (PMC) on it.

Yes, Matt's suggestion would work, though I never tried lowering
KERNELBASE. I don't think the kernel supports lowering it below
0x80000000 btw.

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/

\
 
 \ /
  Last update: 2005-03-22 13:28    [W:0.063 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site