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

[Robert Yang]

On 03/30/2016 11:19 AM, Bruce Ashfield wrote:
> On 2016-03-29 9:51 PM, Robert Yang wrote:
>>
>>
>> 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
>
> aufs simply comes along later in the cycle. Since I do the
> merges, I'd know if it was missed or not :)

Thanks, would you please ping me after merged so that I can check
whether live image + aufs works well or not.

// Robert

>
>> 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 ?
>
> Nope .. aufs is still supported, since it has different features
> than overlayfs. There is not "one union filesystem to rule them
> all".
>
> Bruce
>
>>
>> // 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
>>>>>
>>>>
>>>>
>
>