Re: [for-next][PATCH 08/18] parisc: function_graph: Simplify with function_graph_entry()
HI Sasha,
On 23.11.18 08:30, Sasha Levin wrote:
My suggestion, although I didn't looked too much on it: Apply it to v4.9 and higher only. I think I started fixing trace functionality on parisc around 4.6, which is probably why applying it fails on v4.4 and v3.x
Helge
On Fri, 23 Nov 2018 10:06:05 +0100 Helge Deller deller@gmx.de wrote:
The problem is, if you backport the generic patches, it will completely break any arch that isn't updated. This also includes the archs that are no longer supported upstream, as they were not changed to handle the generic updates either.
-- Steve
On Fri, Nov 23, 2018 at 12:12:53PM -0500, Steven Rostedt wrote:
Does this mean that someone (Steve) will send a backport of this to all relevant stable trees? Right now it looks like the series will randomly apply on a mix of trees, which can't be good.
-- Thanks, Sasha
On Fri, 23 Nov 2018 13:34:15 -0500 Sasha Levin sashal@kernel.org wrote:
Nope. I stated that in my 0 patch.
-- Steve
On Fri, Nov 23, 2018 at 02:26:17PM -0500, Steven Rostedt wrote:
That's not good though, if you don't intend for them to be automagically backported to stable trees by Greg, then they shouldn't be tagged at all and if someone is interested then he can provide a backport.
What will happen with these is that once Greg's scripts process Linus's tree he'll end up with this patch series inconsistently backported to stable trees, which is not what you want here.
Sure, we can wait for the "added to the xyz stable tree" mails and object then, but why risk breaking the trees?
-- Thanks. Sasha
On Fri, 23 Nov 2018 15:00:11 -0500 Sasha Levin sashal@kernel.org wrote:
For the most part they will be fine going back a few releases. But how far back is questionable before they start getting into issues. I talked a bit about this to Greg on IRC and he seemed fine with me adding the stable tag.
If they don't port back properly, it wont be a silent failure. They will either build or they wont. I'm suspect that you build all supported archs for your stable trees, right? If the patch fails to build, then either have someone that cares for that arch back port it, or don't back port the series. Simple as that.
It's not like it won't work and then start to work again. Once they start failing in older versions, they will probably fail in all versions before that.
Sure, we can wait for the "added to the xyz stable tree" mails and object then, but why risk breaking the trees?
Again, it's not much different than other stable patches that need to be fixed for older trees. If they build, they are fine, if they don't then they need to be fixed. You'll know right at build time.
-- Steve
On Sat, Nov 24, 2018 at 01:46:34PM -0500, Steven Rostedt wrote:
So the only tree it applied and built was 4.19, all older trees failed on at least one arch.
I'm going to remove any parts of this series from all other trees.
-- Thanks, Sasha
linux-stable-mirror@lists.linaro.org
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Helge Deller -
Sasha Levin -
Steven Rostedt