why a patch in upstream stable patchset are not added in ubuntu

David Lee saynice111 at gmail.com
Thu Aug 20 05:03:18 UTC 2020


Hi Kleber,

Thanks for your reply. It helps me understand the process of importing
patches from upstream to Ubuntu.

For such queries, please send an email to our mailing-list
kernel-team at lists.ubuntu.com
as it has a greater chance of getting a quicker reply and the information
might be
useful for other people as well.

I cc'ed this reply to kernel-team at lists.ubuntu.com.

Which was released with Ubuntu-4.15.0-87.87 on 2020-01-31.

According to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1857158,
the task of porting patches from v4.14.159, v4.19.89 and v4.19.90 is
created on 2019-12-20 and finished on 2020-02-17. Why it takes three
months? To port from LTS branch, what ubuntu  maintainers needs to do?
>From my current understanding, ubuntu maintainers will port all commits
from v4.14.159, v4.19.89 and v4.19.90 to ubuntu. Only importing does not
take such long time. Is it because there are a lot of conflicts when
applying these patches? Ubuntu maintainers must spend time and energy to
deal with such energy?

Thanks

On Tue, Aug 18, 2020 at 2:18 AM Kleber Souza <kleber.souza at canonical.com>
wrote:

> Hi David,
>
> For such queries, please send an email to our mailing-list
> kernel-team at lists.ubuntu.com
> as it has a greater chance of getting a quicker reply and the information
> might be
> useful for other people as well.
>
> On 14.08.20 07:35, David Lee wrote:
> > Hi Kleber,
> >
> > I just found a patch in
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1857158, "rtc:
> disable uie before setting time and enable after"--7e7c005b4b1f1f169bcc.
> It's in v4.19.89. But it's not patched in Ubuntu-4.15.0-76.86,which is
> issued at Jan 17 2020.
>
> The commit sha1 in the Ubuntu Bionic tree for this fix is
> be2063280b82447253c4b91d20b57c25f0a26579:
>
>
> https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/bionic/commit/?id=be2063280b82447253c4b91d20b57c25f0a26579
>
> Which was released with Ubuntu-4.15.0-87.87 on 2020-01-31.
>
> > Ubuntu-4.15.0-76.86 contains the commit in the "Fixes:"
> in 7e7c005b4b1f1f169bcc, which means that ubuntu introduces the bug. It's
> necessary to be patched. And the patch is also in the list of
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1857158. I thought
> all the patches
> > in that website are to be added in ubuntu. Why is not it added in
> ubuntu? Is there any other rules?
>
> Ubuntu-4.15.0-76.86 really had the problematic commit (6610e0893b8b RTC:
> Rework RTC
> code to use timerqueue for events) which was in linux upstream since
> v2.6.38-rc1,
> however it has been fixed on Ubuntu-4.15.0-87.87 as I mentioned above.
>
> When a fix is mentioned in a bug report like #1857158 you need to look at
> its status
> to check whether the fix has been already released. In this case the
> status for the
> task in Bionic is set to 'Fix Released', meaning that the fix has already
> been
> released to the -updates pocket.
>
> >
> > Thanks
>
>
> Regards,
> Kleber
>
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