litmus-rt.git, branch archive/unc-master-3.0 The LITMUS^RT kernel. P-FP: fix BUG_ON releated to priority inheritance 2013-02-04T14:24:58+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-01-11T13:10:43+00:00 c7cd5432b98df518b05bc8978d34382797fd9a05 In some cases, the PCP priority inheritance code triggered a (defensive) BUG_ON() in fp_common.c. This shuffles the order of operations a bit to be compliant with the restriction that tasks are never compared against themselves. 
In some cases, the PCP priority inheritance code triggered a
(defensive) BUG_ON() in fp_common.c. This shuffles the order of
operations a bit to be compliant with the restriction that tasks are
never compared against themselves.
FDSO: fail to build if some ops are missing 2013-02-04T14:24:58+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-01-10T11:47:01+00:00 4bd4eacab5070ac3003925b50a3d03069ae15e4a Prevents out-of-bounds lookups. 
Prevents out-of-bounds lookups.
TRACE_TASK(): accept NULL pointers 2013-02-04T14:24:57+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-01-20T17:25:51+00:00 44b2be2bd7b1985345bf855bc74dfc303c7c79cb Allow tracing of NULL tasks. Makes debugging a bit easier. 
Allow tracing of NULL tasks. Makes debugging a bit easier.
Reimplement plugin switching using stop_machine() 2013-01-10T15:43:23+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-01-10T15:41:34+00:00 a9a4887bc8dc24b0cf9665f59dc363c126628b25 stop_machine() does exactly what we want (avoid all concurrent scheduling activity) and much simpler than rolling our own (buggy) implementation. 
stop_machine() does exactly what we want (avoid all concurrent
scheduling activity) and much simpler than rolling our own (buggy)
implementation.
Avoid race in do_release_ts() 2013-01-10T15:43:17+00:00 Bjoern Brandenburg bbb@mpi-sws.org 2013-01-10T15:39:19+00:00 b60b41eb47d4746d16c2c1365521bbcb94d6cd2e The list is concurrently being modified by the waking processes. This requires the use of the list_for_each_safe() iterator. Reported by Glenn Elliott. 
The list is concurrently being modified by the waking processes.  This
requires the use of the list_for_each_safe() iterator.

Reported by Glenn Elliott.
Protect SCHED_LITMUS tasks from reschedules triggered by SCHED_FIFO enqueues. 2012-12-21T12:37:14+00:00 Jonathan Herman hermanjl@cs.unc.edu 2012-12-01T19:44:37+00:00 c158b5fbe42dacd34393082b6b8f9f6573ab8c5c (BB: edited to include <litmus/litmus.h> to resolve compile error.) 
(BB: edited to include <litmus/litmus.h> to resolve compile error.)
Config: PREEMPT_STATE_TRACE depends on DEBUG_KERNEL. 2012-12-11T16:39:04+00:00 Christopher Kenna cjk@cs.unc.edu 2012-12-11T16:39:04+00:00 31477ed8ca65bb0a3ed3de4cb6df841e6a785471 This patch makes CONFIG_PREEMPT_STATE_TRACE depend on CONFIG_DEBUG_KERNEL. Prior to this patch, selecting PREEMPT_STATE_TRACE resulted in linker errors (see below), because sched_state_name is not built unless DEBUG_KERNEL is selected. kernel/built-in.o: In function `schedule': (.sched.text+0x3d2): undefined reference to `sched_state_name' 
This patch makes CONFIG_PREEMPT_STATE_TRACE depend on
CONFIG_DEBUG_KERNEL. Prior to this patch, selecting PREEMPT_STATE_TRACE
resulted in linker errors (see below), because sched_state_name is not
built unless DEBUG_KERNEL is selected.

kernel/built-in.o: In function `schedule':
(.sched.text+0x3d2): undefined reference to `sched_state_name'
Send reboot notifications to Litmus 2012-12-07T19:39:40+00:00 Glenn Elliott gelliott@cs.unc.edu 2012-12-07T19:31:07+00:00 e5e0247f927753dc0f22c84773aa48a0beb0d8f9 This patch causes reboot notifications to be send to Litmus. With this patch, Litmus attempts to switch back to the Linux-plugin before the reboot proceeds. Any failures to switch back are reported via printk() (the reboot is not halted). 
This patch causes reboot notifications to be send
to Litmus.  With this patch, Litmus attempts to
switch back to the Linux-plugin before the reboot
proceeds.  Any failures to switch back are reported
via printk() (the reboot is not halted).
litmus: get rid of unused RT_F_EXIT_SEM flag 2012-11-27T18:50:17+00:00 Manohar Vanga mvanga@mpi-sws.org 2012-10-03T23:06:01+00:00 63537c738e7eb0ad6bc064b5e47c88092897c1cb This patch removes the RT_F_EXIT_SEM flag. All code paths depending on it being true are assumed to be unreachable and removed. The 'flags' field in struct rt_params is left as-is for use by specific schedulers. For example, sched_pfair defines a custom flag RT_F_REQUEUE within the 'flags' field. Signed-off-by: Manohar Vanga <mvanga@mpi-sws.org> 
This patch removes the RT_F_EXIT_SEM flag. All code paths
depending on it being true are assumed to be unreachable
and removed.

The 'flags' field in struct rt_params is left as-is for
use by specific schedulers. For example, sched_pfair
defines a custom flag RT_F_REQUEUE within the 'flags'
field.

Signed-off-by: Manohar Vanga <mvanga@mpi-sws.org>
litmus: use is_present() instead of using rt_param->present 2012-11-27T18:50:17+00:00 Manohar Vanga mvanga@mpi-sws.org 2012-10-03T22:35:53+00:00 e2c4a5f574548f7b2b1d55adab3b02fb2d068ea3 Signed-off-by: Manohar Vanga <mvanga@mpi-sws.org> 
Signed-off-by: Manohar Vanga <mvanga@mpi-sws.org>