Messages in this thread | | | Date | Mon, 17 Sep 2007 11:11:52 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: patch/option to wipe memory at boot? |
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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.
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