[Arm-dev] Kernel ?

[Robert Moskowitz]

On 08/31/2017 07:50 PM, Jacco Ligthart wrote:
> On 09/01/17 00:30, Robert Moskowitz wrote:
>>
>> On 08/31/2017 10:09 AM, Fabian Arrotin wrote:
>>> On 31/08/17 14:34, Robert Moskowitz wrote:
>>>> On 08/22/2017 03:36 PM, Michael Schumacher wrote:
>>>>>     Nicolas,
>>>>>
>>>>>> Does someone use a bananapi on centos ?
>>>>>> I'm using it for a long time, and I'm still on 4.2 kernel.
>>>>>> Every time I try to install a newer I got a lot of errors during
>>>>>> install, or yum get stuck on "cleaning..".
>>>>>> The last time I success to install it, it's not very stable...
>>>>> looks like you ran into the problem with a too small /boot partition.
>>>>> I had that problem too. Increasing the size of the /boot partition to
>>>>> about 10G solves the problem. This is a problem of the Centos
>>>>> installation image. I believe Robert had the same issue.
>>>> Catching up.  Was off on another project, writing a guide to build an
>>>> ECDSA PKI....
>>>>
>>>> Yes, I hit the out of space.
>>>>
>>>> What we need is for someone to fix the update-boot script to rip out
>>>> old
>>>> kernels.  We are use to this with the mainline platforms.  We should
>>>> get
>>>> it here.  Also Fedora-arm has it...
>>>>
>>>> Bob
>>>>
>>> Welcome to OSS ! "submit patch" [TM] :-)
>> To do that I would have to:
>>
>> Know what files are related to a kernel
>> Know how to identify the oldest kernel, or rather which kernels are
>> the older of N kernels.
>> Know how to, in a script, parameterize the selection of a kernel and
>> all its files
>>
>> And I come up empty on all the above.  I can write simple scripts, and
>> Professor Goggle is good at giving me short lessons to, at times,
>> expand my horizons.
>>
>> But this is not something I am going to tackle.  I will just put up
>> with things as they are.
> I guess it is a bit easier than that, we have a package manager for this!
>
> find the installed kernel packages and remove the ones you don't want
> any more. If you always want only x kernels installed, have a look at
> "installonly_limit" in yum.conf

I just checked and it is set to 5 for the Cubieboard image.  And this is 
too high for that 500MB boot partition, it seems.

I would recommend everyone turn it down to 3, as Fabian has been doing 
well with kernels.... :)

>
> Not sure which kernel we're talking about, but if this is the raspberry
> rpm, there used to be a 'post' script in the rpm what makes a initrd
> file after install. these initrd things are not used during boot (on a
> raspberry at least). Removing those will also save you ~ 25M per kernel
> version.
> better yet, adjust the spec file to not make them :)
>
> Jacco
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