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SubjectRe: [Ksummit-discuss] bug-introducing patches
On Fri, May 04, 2018 at 02:38:01PM -0700, James Bottomley wrote:
>On Fri, 2018-05-04 at 17:13 -0400, Theodore Y. Ts'o wrote:
>> If it's not necessary, fine.  But we should still delete what is
>> currently documented in stable_kernel_rules and was introduced in
>> 8e9b9362266d, because it doesn't describe current practice.
>It definitely doesn't seem to describe current practice. It looks like
>it got applied because the commit description bears a somewhat strange
>relation to the actual text that was added: The commit talks about the
> original script that used to forward to stable (although it got me and
>hpa confused) which seems to refer to a tiny deletion and the rest is
>adding an Ingo one off proposal for dependencies.

The usage for something like this is only if a commit that we didn't
previously think would go to stable now has to because it's a dependency
of a new -stable commit, so the expected usage will be pretty small

I don't have an objection to moving this to it's own tag. It will make
my scripts somewhat simpler for sure.

>For the record: Greg runs his own script now and I'm not involved.
>Current process (at least from the SCSI centric view) is that if we
>screw up and forward a commit with missing dependencies to stable via a
>cc: tag, it won't apply and Greg tells us to fix it, which we do. That
>seems to be an adequately functional process for the odd times we run
>into this.

Assuming a commit won't apply/fail to build because of dependencies is
really not a safe approach, which I keep getting reminded of quite

See for example this patch:

It will apply and build, but will fail to boot on a particular flavor
of ARMv7, and this is just the obvious failure modes of approaches like

So again, I don't have a an objection to changing the docs or the way
it's being done now, but the new way should make it very easy for folks
to list dependency chains if they want to.
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