lkml.org 
[lkml]   [2007]   [Sep]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: patch/option to wipe memory at boot?
David Madore wrote:
> Is there a patch or a boot option or something which wipes all
> available (physical) RAM at boot (or better, fills it with a fixed
> signature like 0xdeadbeef)? I'm getting phony ECC errors and I'd like
> to test whether they go away when the RAM is properly initialized.
> Also, I'd like to know exactly which parts of RAM are being used and
> which are untouched since boot (hence the 0xdeadbeef signature).
>
> If this patch/option doesn't exist, can anyone give me a hint as to
> where and how it would be best to add this? (I'm afraid I'm very
> ignorant as to how Linux sets up its RAM mapping.) I'm concerned
> about x86 and x86_64.
>
> PS: I'm not finicky: it's all right if a couple of megabytes at the
> bottom of RAM are not scrubbed (I'm more interested about the top
> gigabyte-or-so), especially if they're guaranteed to be used by the
> kernel.
>

Boot memtest86 for a little while before booting the kernel? And if you
haven't already run it for a while, then that would be your first step
anyway.

J
-
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: 2007-09-17 20:15    [W:0.058 / U:0.776 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site