[linux-yocto] [PATCH 1/2] preempt-rt.cfg/standard.cfg: enable OVERLAY_FS

[Robert Yang]

On 03/30/2016 09:08 AM, Robert Yang wrote:
>
>
> On 03/29/2016 08:40 PM, Bruce Ashfield wrote:
>> On 2016-03-29 3:23 AM, Robert Yang wrote:
>>> Otherwise the live iso will be readonly.
>>
>> Not true .. overlayfs is one way to have a read/write ISO, but
>> not the only.
>>
>> This isn't something we bury in the middle of the ktypes. aufs
>> has always been a standalone configuration option, and one that
>> is enabled via KERNEL_FEATURES.
>>
>> This is an alternative to the exiting aufs use case, and should
>> be treated a similar way (with a generic feature, an enable and
>> a disable). See the aufs fragments as a template to follow.
>
> Sounds good, I will send a V2.

Hi Bruce,

After more investigations, linux-yocto 4.4 does have features/aufs/aufs.scc,
but I can't find any source of aufs in kernel-source, I'm afraid that
linux-yocto doesn't merge aufs' patch. And when I added features/aufs/aufs.scc
to KERNEL_FEATURES, I got this in merge_log.txt:

Value requested for CONFIG_AUFS_FS not in final .config
Requested value:  CONFIG_AUFS_FS=y
Actual value:

Since overlayfs has been merged by mainline, maybe we can drop aufs support ?

// Robert

>
> // Robert
>
>>
>> Bruce
>>
>>>
>>> Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
>>> ---
>>>   ktypes/preempt-rt/preempt-rt.cfg | 2 ++
>>>   ktypes/standard/standard.cfg     | 2 ++
>>>   2 files changed, 4 insertions(+)
>>>
>>> diff --git a/ktypes/preempt-rt/preempt-rt.cfg b/ktypes/preempt-rt/preempt-rt.cfg
>>> index 4c62804..c4a5617 100644
>>> --- a/ktypes/preempt-rt/preempt-rt.cfg
>>> +++ b/ktypes/preempt-rt/preempt-rt.cfg
>>> @@ -1116,3 +1116,5 @@ CONFIG_CRYPTO_TEST=m
>>>   #
>>>   CONFIG_LIBCRC32C=m
>>>   CONFIG_ZLIB_DEFLATE=m
>>> +
>>> +CONFIG_OVERLAY_FS=y
>>> diff --git a/ktypes/standard/standard.cfg b/ktypes/standard/standard.cfg
>>> index b3dbde5..4099fda 100644
>>> --- a/ktypes/standard/standard.cfg
>>> +++ b/ktypes/standard/standard.cfg
>>> @@ -1108,3 +1108,5 @@ CONFIG_LIBCRC32C=m
>>>   CONFIG_ZLIB_DEFLATE=m
>>>
>>>   CONFIG_SHMEM=y
>>> +
>>> +CONFIG_OVERLAY_FS=y
>>>
>>
>>