Yum random crashes in XO4 f20 images

[Martin Abente Lahaye]

Thanks for the quick reponse,

On Tue, Sep 9, 2014 at 10:55 AM, Peter Robinson <pbrobinson at gmail.com>
wrote:

> Hi Martin,
>
> > I am have been building a Fedora 20 image for the XO4, and I am seeing
> > memory corruption problems while running yum in these images (please
> check
> > the logs [1,2]).
>
> The logs don't mean anything to me. What device are you running it on,
> how much memory, do you have swap enabled?
>

It is running on a XO4, with 999MB ram and no swap. Maybe James can explain
better what other specs are for the XO4.


>
> > To give you some context, we are using olpc-os-builder (master [3]) with
> > fc20 repositories plus a few hand-crafted packages such as the kernel,
> > systemd and xorg, taken from previous Daniel Narvaez efforts [4,5].
> >
> > These crashes happens randomly when yum is running, by calling yum
> update or
> > when olpc-os-build is installing system packages.
>
> Yum isn't the most memory friendly, and some of the post update
> scripts aren't either, you need to make sure there's enough
> memory/swap.
>

I am not so sure this is related to memory usage really, as it happens even
when I am installing just a few packages (located in FS)  via "yum update
/packages/*.rpm".

>
> > James Cameron, who spent some time researching about this issue,
> speculates
> > that this problem could be caused by: (a) using older kernel that was
> > compiled (possibly) with different options compared to f20's, or (b) a
> > faulty glibc library.
> >
> > I was wondering if this could be related to something else, something
> more
> > specific to  yum or python arm binaries (?).
>
> Unlikely, I've not seen issues elsewhere. But I need more details.
>

What kind of details would you need? I can try reproducing and send what
you need.


>
> > I would sincerely appreciate any guidance you can provide to start
> > discarding possibilities and try to debug this issue.
> >
> > Thanks in advance for any help you can provide!
>
> What version of OOB are you using, and what config files? I can try
> and recreate the problem here on other devices.
>

This problem occurs in all f20 images for the XO4 that we or others have
created.

The latest images were created using:

* OLPC's OOB masterbranch: git://dev.laptop.org/projects/olpc-os-builder
* OLPC's .ini file:
http://dev.laptop.org/git/projects/olpc-os-builder/tree/examples/olpc-os-14.1.0-xo4.ini

In case you have a XO4 with you, and have the time to try this out, you can
download an image from
http://system.one-education.org/au2a/images/testing/40002au4/


> Peter
>
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