i have released the 2.6.13-rt6 tree, which can be downloaded from the
usual place:
http://redhat.com/~mingo/realtime-preempt/
there are lots of small updates all across and there's a big feature as
well in this release: a complete rework of the high-resolution timers
framework, from Thomas Gleixner, called 'ktimers'.
under the ktimer framework the HR (and posix) timers live in a separate
domain, have their own (per-CPU) rbtree to stay scalable and
deterministic even with a high number of timers. Another positive effect
of the introduction of separate ktimers is that kernel/timer.c is now
using preemptible locks again, removing the cascade() worst-case
latency. The cleanup factor is high as well: the ktimer framework
slashes 1300+ lines off the HRT code. See kernel/ktimer.c for details.
the end-effect of ktimers is a much more deterministic HRT engine. The
original merging of HR timers into the stock timer wheel was a Bad Idea
(tm). We intend to push the ktimer subsystem upstream as well.
Changes since 2.6.13-rt1:
- new ktimer subsystem to cleanly implement High Resolution Timers
(Thomas Gleixner)
- BKL fix for the new pi-lock code (Steven Rostedt)
- SMP fix for the new pi-lock code (Steven Rostedt)
- ALL_TASKS_PI updates (Daniel Walker, Steven Rostedt)
- trace-irqs fix (Daniel Walker)
- add raw_irqs_disabled() into the might_sleep() check (Daniel Walker)
- turned off ALL_TASKS_PI
- ide_lock updates
- ioapic build fix
- HRT build fixes
to build a 2.6.13-rt6 tree, the following patches should be applied:
http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.13.tar.bz2
http://redhat.com/~mingo/realtime-preempt/patch-2.6.13-rt6
Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |