|From:||Steven Rostedt <rostedt-AT-goodmis.org>|
|To:||Linus Torvalds <torvalds-AT-linux-foundation.org>|
|Subject:||Re: [RFC][PATCH] tracing: Remove useless 4 bytes of padding from every event|
|Date:||Wed, 16 May 2012 16:00:04 -0400|
|Cc:||LKML <linux-kernel-AT-vger.kernel.org>, Arjan van de Ven <arjan-AT-linux.intel.com>, Ingo Molnar <mingo-AT-elte.hu>, Frederic Weisbecker <fweisbec-AT-gmail.com>, David Sharp <dhsharp-AT-google.com>, Vaibhav Nagarnaik <vnagarnaik-AT-google.com>, Peter Zijlstra <peterz-AT-infradead.org>, Andrew Morton <akpm-AT-linux-foundation.org>|
On Wed, 2012-05-16 at 12:33 -0700, Linus Torvalds wrote: > F16 and F17 seem to have powertop-1.98, which I assume is the new > world order already. But maybe I assume incorrectly. Seriously though. What's your take on changing the kernel that will break an older distro. Obviously, this change is too early to apply. But because an old distro has one app that will break if we make a change in the kernel, is that enough to keep that change out? Lets say we are at F23, and F18+ have the new powertop tools. Lets even go to say that F16 and F17 have updated their powertop to powertop v2. Because someone may be running a F17 without updates, which has powertop that will break if they update their kernel, rational to keeping that change out? I want to know if this change will ever go in. Otherwise, I have to make workarounds for it. I have no problem with that, as I will be adding workarounds anyway, but this will continue to punish the tools that use the non-workaround methods even though they don't break with the change. Now if you say that it's OK to break and old distro if the affected tools in the new distros work. What's the timeframe of that? One year? -- Steve
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