Re: New reliability technique

[Jesper Juhl]

On 2/25/06, Victor Porton <porton@xxxxxxxxxxx> wrote:
> A minute ago I invented a new reliability enhancing technique.
>
> In idle cycles (or periodically in expense of some performance) Linux can
> calculate MD5 or CRC sums of _unused_ (free) memory areas and compare these
> sums with previously calculated sums.
>
> Additionally it can be done for allocated memory, if it will be write
> protected before the first actual write. Moreover, all memory may be made
> write-protected if it is not written e.g. more than a second. (When it
> is written kernel would unlock it and allow to write, by a techniqie like
> to how swap works.) If write-protected memory appears to be modified by
> a check sum, this likewise indicates a bug.
>
> If a sum is inequal, it would notice a bug in kernel or in hardware.
>
> I suggest to add "Check free memory control sums" in config.
>

Implement it then and send a patch.

--
Jesper Juhl <jesper.juhl@xxxxxxxxx>
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/