[OE-core] [PATCH 1/3] systemd: fix formatting IDE storage does not trigger "change" uevents

[Hongxu Jia]

On 2017年11月21日 10:00, Andre McCurdy wrote:
> On Mon, Nov 20, 2017 at 5:21 PM, Hongxu Jia <hongxu.jia at windriver.com> wrote:
>> On 2017年11月20日 19:07, Burton, Ross wrote:
>> On 17 November 2017 at 06:08, Hongxu Jia <hongxu.jia at windriver.com> wrote:
>>> +qemu by default emulates IDE and the linux-yocto kernel(s) use
>>> +CONFIG_IDE instead of the more modern libsata, so disks appear as
>>> +/dev/hd*. A similar patch rejected by upstream because CONFIG_IDE
>>> +is deprecated.
>> Can we fix our kernel and/or qemu configuration too?
>>
>> For qemu, RP have replace it with virtio, but it have the
>> similar issue on virtualbox with IDE controller.
> VirtualBox gives you the choice about whether to connect the HDD image
> to a virtual IDE or SATA port.
>
> ie VirtualBox isn't a reason to have our rootfs images continue to try
> to support IDE.

For IDE, the mainstream distribution (ubuntu/fedora) do not support it.

Ubuntu 17.10, kernel 4.13.0-16
vim /boot/config-4.13.0-16-generic
...
# CONFIG_IDE is not set
CONFIG_ATA_PIIX=y
...

Fedora 27, kernel 4.13.5
vi /boot/config-4.13.5-300.fc27.x86_64
...
# CONFIG_IDE is not set
CONFIG_ATA_PIIX=y
...

The IDE seems not stable, and I have fixed two issue on it.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=79d73346ac05bc31f2e96f899c4e9aaaa616a8d4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8dc7a31fbce5e2dbbacd83d910da37105181b054

If enable both of IDE and ATA and the IDE still have a higher priority.
We should explicitly not set CONFIG_IDE.

Here is the discussion on upstream mailing list.
https://www.mail-archive.com/linux-block@vger.kernel.org/msg15114.html

//Hongxu

>> ...
>> commit f59e729f98ef9b506b0cfdc415567e03ec87f2a9
>> Author: Richard Purdie <richard.purdie at linuxfoundation.org>
>> Date:   Tue Aug 22 22:58:02 2017 +0100
>>
>>      runqemu: Use virtio to mount cdrom drives
>>
>>      The IDE driver in the kernel is fragile and in 4.12 is causing
>> backtraces.
>>      To unblock 4.12 kernel merging use the virtio CD driver instead to mount
>>      iso images which should be faster and more stable.
>> ...
>>
>> //Hongxu
>>
>> Ross
>>
>> --
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