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Old 12-05-2011, 06:25 AM
Dmitry Smirnov
 
Default Bug#613321: linux-image-amd64: Please enable 'memtest' option for all linux kernels

On Monday 05 December 2011 16:53:22 Ben Hutchings wrote:
> Your request cannot be satisfied since the MEMTEST option is only
> available for x86. However, I suspect that's all you really care about.

So the feature won't be available on amd64?

Just x86 is a bit disappointing but certainly better than nothing.

I care about availability of this function and about decision making as well.
I took a very long time to make it where we are now...

> Since this feature requires almost no extra memory (the code is all
> discardable after boot) I'm prepared to enable it. However, I will
> modify it to taint the kernel if any memory fault is detected, on the
> basis that there are likely to be other undetected faults.

This appears to be a good idea.

Thank you very very much.

Dmitry.



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Old 12-05-2011, 08:00 AM
Dmitry Smirnov
 
Default Bug#613321: linux-image-amd64: Please enable 'memtest' option for all linux kernels

Sorry Ben,

I feel like I need to clarify some ambiguity of our communication.

When in reply to bug filed against linux-image-amd64 you sad "Your request
cannot be satisfied since the MEMTEST option is only available for x86",
my perception let me think that for some reason you meant the feature cannot
be enabled for amd64.

Now I realize you probably meant MEMTEST will be available only on x86 i.e. on
amd64 (aka x86_64) and on i386 (aka x86_32) but not on other platforms.

This is certainly good enough for me since like vast majority of users I have
only x86 in my possession.
I reckon many people might feel satisfied.

Thanks again for your hard work.

Regards,
Dmitry.




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Old 12-05-2011, 01:11 PM
Ben Hutchings
 
Default Bug#613321: linux-image-amd64: Please enable 'memtest' option for all linux kernels

On Mon, 2011-12-05 at 20:00 +1100, Dmitry Smirnov wrote:
> Sorry Ben,
>
> I feel like I need to clarify some ambiguity of our communication.
>
> When in reply to bug filed against linux-image-amd64 you sad "Your request
> cannot be satisfied since the MEMTEST option is only available for x86",
> my perception let me think that for some reason you meant the feature cannot
> be enabled for amd64.
>
> Now I realize you probably meant MEMTEST will be available only on x86 i.e. on
> amd64 (aka x86_64) and on i386 (aka x86_32) but not on other platforms.
[...]

That's correct. In the context of the Linux kernel, 'x86' includes
both.

Ben.

--
Ben Hutchings
Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer
 
Old 12-09-2011, 03:02 AM
Carlos Alberto Lopez Perez
 
Default Bug#613321: linux-image-amd64: Please enable 'memtest' option for all linux kernels

On 05/12/11 06:53, Ben Hutchings wrote:
> Since this feature requires almost no extra memory (the code is all
> discardable after boot) I'm prepared to enable it. However, I will
> modify it to taint the kernel if any memory fault is detected, on the
> basis that there are likely to be other undetected faults.

Indeed good idea. I think you should submit this patch upstream.


Regards!

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~
Carlos Alberto Lopez Perez http://neutrino.es
Igalia - Free Software Engineering http://www.igalia.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~



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Old 12-09-2011, 08:28 AM
Robert Moonen
 
Default Bug#613321: linux-image-amd64: Please enable 'memtest' option for all linux kernels

Hello Dimitry,

Since I am only responding to you and not to a list where others
interested in the conversation that might not have read it are
involved, I will top post as opposed to posting inline, this ensures
brevity in my response as well as not requiring you to search out my
response.

OK. since memtest has traditionally always been a separate binary, not
a part of the kernel. It would seem to me that if it is indeed now a
part of the kernel, which I doubt, then it may well be an experimental
feature requiring further testing before being released into the wild.

there we have it.

Robert G. Moonen

On 12/1/11, Dmitry Smirnov <onlyjob@member.fsf.org> wrote:
> I would like to reopen this discussion since there are some unanswered
> questions.
>
> Are we censoring certain Linux Kernel features because "they are not good
> enough"?
>
> If so,
> * How do we decide what experimental feature is OK?
> (For example we have btrfs along with many other things, long before they
> will
> become useful)
>
> * What's the decision criteria? It appears to me that particularly
> MEMTEST was refused purely because of prejudice rather than risk assessment.
>
>
> It is probably obvious to everyone that MEMTEST is harmless.
> Then why not enable it without painful discussions?
> What's our reason/excuse? (I think arguments like "it is not good enough"
> won't be qualified as reasonable answer due to availability of many other
> experimental features.)
>
> If just few requests for a feature is not enough to convince that we need
> it,
> how many people should ask, exactly, in order to make the change?
> (If I shall I start gathering signatures for petition, how many do I need?
>
>
>
> Thank you.
>
> Regards,
> Dmitry.
>



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