Re: Forward port of latest RT patch (2.6.21.5-rt20) to 2.6.22 available
From: Ingo Molnar <hidden>
Date: 2007-07-12 16:35:40
Also in:
lkml
* Gregory Haskins [off-list ref] wrote:
quoted hunk ↗ jump to hunk
For the most part, it seems you guys have resolved most of the issues that we ran into as well (e.g. early-flush-tlb, relocated die-notifier, etc, come to mind). I found one patch that was missing that allows debug configurations to build properly. Heres that patch:--- linux-2.6.21.orig/kernel/latency_trace.c +++ linux-2.6.21/kernel/latency_trace.c@@ -24,6 +24,7 @@ #include <linux/utsrelease.h> #include <asm/uaccess.h> #include <asm/unistd.h> +#include <asm/asm-offsets.h>
i think this breaks PPC (which has no asm-offsets.h file). In any case i saw this build breakage too and the fix is in -rt2.
We did find a regression. I was mistaken earlier when I mentioned our T60p laptops couldn't boot. It turns out that issue was resolved somewhere along the way and our published patches based on 21.5-rt19 do allow the laptop to boot event with acpi=on. With 22.1-rt1 the laptop crashes unless acpi=off. Now that we have your queue we will bisect this and post that fix as well.
ok. Make sure you check rt2 as well - and note that it's not fully bisectable with PREEMPT_RT enabled (but should probably be fully bisectable with PREEMPT_RT disabled). So check out first whether the problem still persists with PREEMPT_RT disabled. Ingo