Re: [PATCH 1/1] image.bbclass: default USE_DEVFS to '1'

[ChenQi <Qi.Chen@windriver.com>]

On 12/09/2013 09:52 PM, Andrea Adami wrote:
> On Mon, Dec 9, 2013 at 12:52 PM, Otavio Salvador
> <otavio@ossystems.com.br> wrote:
>> Hello,
>>
>> I agree with the commit but ...
>>
>> On Mon, Dec 9, 2013 at 1:17 AM,  <Qi.Chen@windriver.com> wrote:
>>> From: Chen Qi <Qi.Chen@windriver.com>
>>>
>>> Default USE_DEVFS to "1" so that the `makedevs' command is not run
>>> at rootfs time by default. There are mainly two reasons to do so.
>>> 1. This will fix a build failure with initramfs-kexecboot-klibc-image.
>> Can you elaborate this error? is it something we can/should fix?
>>
>>> 2. Most of our images use a filesystem over /dev. Most of the time, it's
>>>     just devtmpfs. So we actually are using a filesystem over /dev.
>>>
>>> Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
>>> ---
>>>   meta/classes/image.bbclass |    2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
>>> index cc65e35..b8bd462 100644
>>> --- a/meta/classes/image.bbclass
>>> +++ b/meta/classes/image.bbclass
>>> @@ -77,7 +77,7 @@ PACKAGE_INSTALL_ATTEMPTONLY ?= "${FEATURE_INSTALL_OPTIONAL}"
>>>   # Images are generally built explicitly, do not need to be part of world.
>>>   EXCLUDE_FROM_WORLD = "1"
>>>
>>> -USE_DEVFS ?= "0"
>>> +USE_DEVFS ?= "1"
>>>
>>>   PID = "${@os.getpid()}"
>>>
>>> --
>>> 1.7.9.5
>>>
>>> _______________________________________________
>>> Openembedded-core mailing list
>>> Openembedded-core@lists.openembedded.org
>>> http://lists.openembedded.org/mailman/listinfo/openembedded-core
>>
>>
>> --
>> Otavio Salvador                             O.S. Systems
>> http://www.ossystems.com.br        http://code.ossystems.com.br
>> Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750
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>
> The underlying issue here is the extra pass of makedevs  " makedevs:
> No entry for root in search list "
>
> At first I could not understand why that was *not* happening on my
> builds then I realized we set
> IMAGE_DEVICE_TABLES = "" in our machine.conf because we use devtmpfs
> for all images.
>
> qemux86 does instead inherit the default setting of image.bbclass so
> it uses "files/device_table-minimal.txt"
>
>
> Cheers
>
> Andrea
>
>

Thanks for you extra information.

Best Regards,
Chen Qi