On Mon, 4 Feb 2013 15:58:26 +0100 (CET) Thomas Gleixner <t...@linutronix.de> wrote:
> Dear RT Folks, > > I'm pleased to announce the 3.6.11-rt26 release. > > Changes since 3.6.11-rt25: > > 1) Fix the RT highmem implementation on x86 > > 2) Support highmem + RT on ARM > > 3) Fix an one off error in the generic highmem code (upstream fix > did not make it into 3.6.stable) > > 4) Upstream SLUB fixes (Christoph Lameter) > > 5) Fix a few RT issues in mmc and amba drivers > > 6) Initialize local locks in mm/swap.c early > > 7) Use simple wait queues for completions. This is a performance > improvement. > > Completions do not have complex callbacks and the wakeup path is > disabling interrupts anyway. So using simple wait locks with the > raw spinlock is not a latency problem, but the "sleeping lock" > in the normal waitqueue is a source for lock bouncing: > > T1 T2 > lock(WQ) > wakeup(T2) > ---> preemption > lock(WQ) > pi_boost(T1) > wait_for_lock(WQ) > unlock(WQ) > deboost(T1) > ---> preemption > .... > > The simple waitqueue reduces this to: > > T1 T2 > raw_lock(WQ) > wakeup(T2) > raw_unlock(WQ) > ---> preemption > raw_lock(WQ) > .... > > @Steven: Sorry, I forgot the stable tags on: > drivers-tty-pl011-irq-disable-madness.patch > mmci-remove-bogus-irq-save.patch > idle-state.patch > might-sleep-check-for-idle.patch > mm-swap-fix-initialization.patch > > I'm still digging through my mail backlog, so I have not yet decided > whether this is the last RT release for 3.6. > > > The delta patch against 3.6.11-rt25 is appended below and can be found > here: > > > http://www.kernel.org/pub/linux/kernel/projects/rt/3.6/incr/patch-3.6.11-rt25-rt26.patch.xz > > The RT patch against 3.6.11 can be found here: > > > http://www.kernel.org/pub/linux/kernel/projects/rt/3.6/patch-3.6.11-rt26.patch.xz > > The split quilt queue is available at: > > > http://www.kernel.org/pub/linux/kernel/projects/rt/3.6/patches-3.6.11-rt26.tar.xz > > Enjoy, > > tglx > Thomas, I needed this change to build: diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index efe4b33..3d5231f 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -26,6 +26,7 @@ #include <linux/errno.h> #include <linux/rbtree.h> +#include <linux/wait.h> struct vm_area_struct; struct mm_struct; Clark
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