lkml.org 
[lkml]   [2006]   [Apr]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Flexible mem= parameter
On Fri, 14 Apr 2006 00:49:12 +0200 (MEST) Jan Engelhardt wrote:

> Hello,
>
> mem= can be used to limit the amount of physical memory Linux uses. I
> presume that when specifying mem=256M only the memory from 0x0 to
> 0x10000000 is used. Is there a way to tune mem= so that it will use
> 0x70000000 to 0x80000000? (A compile-time change would suffice.)
>
>
> Background: I am trying to track down a nondeterministic (but
> reproducible) segfault while building big projects like gcc or glibc. I do
> not think it's a memory problem since it only showed up since I changed to
> gcc 4.1.0 and tweaked it to use -mcpu=ultrasparc (rather than -mcpu=v7) by
> default. I had been building gcc4 before with gcc3 a number of times w/o
> problems. I did ran a userspace memtester for approx 20 hours (`memtest`
> from debian).

I've never tried it, but Documentation/kernel-parameters.txt
suggests using mem= along with memmap= to specify an exact memmap.

memmap=nn[KMG]@ss[KMG]
[KNL] Force usage of a specific region of memory
Region of memory to be used, from ss to ss+nn.


Is this on a sparc system or are you just building sparc tools?
I don't know if memmap= works on sparc arch.

---
~Randy
-
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: 2006-04-14 01:22    [W:0.051 / U:0.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site