On 2/25/06, Victor Porton <[email protected]> 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 <[email protected]>
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