[PATCH] Display progress during getmemsize() so the kernel doesn't look like it hanged

Oliver Pinter oliver.pinter at hardenedbsd.org
Sat Jan 17 17:12:30 UTC 2015


On Sat, Jan 17, 2015 at 5:57 PM, Patrick Powell <papowell at astart.com> wrote:
> On 01/16/15 13:56, Ed Maste wrote:
>>
>> On 16 January 2015 at 10:02, Patrick Powell <papowell at astart.com> wrote:
>>>
>>> On 01/14/15 22:59, Allan Jude wrote:
>>>>
>>>> Glad to see this, thanks for doing the work Ravi. Also, I agree with
>>>> jhb@,
>>>> we should disable the test by default in stable/10 (i think it is off by
>>>> default only for VMs currently).
>>>
>>>
>>> Please please do not disable memory tests by default.  If you do, when
>>> trying to boot from a CD/Memory Stick
>>> image on a system with bad memory (which would be found by the tests)
>>> then
>>> it gets quite difficult to find this
>>> problem.
>>
>> The boot time "memory test" is not particularly valuable, especially
>> on contemporary amd64 hardware. While it won't have any false
>> positives, there are a huge number of failure modes it will not catch.
>> It also does not inform the user of "failure" -- it just removes that
>> memory from the kernel's map. It's really a test of memory presence,
>> not quality.
>
>
> Right.  But at least it gets you crawling...  or staggering... so you can do
> further diagnostics.
>
> Bad memory is a *((*&^( NASTY problem.
>
> Since we seem to have diverged a bit on topic,  any recommendations for
> stand-alone memory tests?

I tried memtest86+ from ports and from pkg, but when I load it from
loader via load /boot/opt/memtest86+ I got constant reboot. And fully
reproducible with real and virtual machine too.

>
> --
> Patrick Powell                 Astart Technologies
> papowell at astart.com            1530 Jamacha Rd, Suite X
> Network and System             San Diego, CA 92019
>   Consulting                   858-874-6543 FAX 858-751-2435
> Web: www.astart.com
>
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