Likely Duplicate Bugs

Brian Murray brian at
Mon Feb 8 02:25:45 UTC 2010

On Mon, Feb 01, 2010 at 11:56:00AM +0000, Colin Ian King wrote:
> Hi Brian,
> This kernel message are dups of the same BIOS corruption message, but
> occurs on a wide range of machines. I had a look at the first 15 or so
> of the dups and saw that there was a wide spread of Aspire, HP Compaqs
> and Pavilions and quite a number of unknown systems too.

Should these duplicate bug reports be consolidated into one bug or
should there be multiple bug reports for each system model?
> Specifically, the kernel fills known regions of the low 64K of memory
> with a known pattern and periodically monitors them.  Any buggy BIOS
> that writes to these regions gets detected and the warning is issued.
> BIOS corruption of these regions can occur when doing suspend/resume or
> HDMI cable unplugging.
> The error message is a warning - the system's stability is not
> compromised as the pages being monitored are already reserved for the
> purpose of being monitored for corruption in the first place.
> This check can be disabled by setting the kernel boot parameter
> memory_corruption_check=0
> Since this is intended as a BIOS corruption detection tool perhaps it
> should be disabled as a compile time option to stop getting these
> messages. However, it does have some value in showing that the BIOS may
> be dodgy. 

Perhaps the ideal solution is to keep it enabled until the final version
of the release.  This will still provide us with useful information
about buggy BIOSes but by disabling it for the final release we will
reduce the quantity of redundant bugs.

Brian Murray                                       
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