a0e1af2614
SMP: Fix yet another potential deadlock
2016-11-25 23:04:27 -06:00
7bec4ffeec
Update some comments
2016-11-23 17:40:01 -06:00
f90525a5d1
SMP: Update some comments; trivial improvement by inlining static function.
2016-11-22 16:48:57 -06:00
bac7153609
SMP: Add logic to avoid a deadlock condition when CPU1 is hung waiting for g_cpu_irqlock and CPU0 is waitin for g_cpu_paused
2016-11-22 11:34:16 -06:00
69e9f8638d
Most interrupt handling logic interacts with tasks via standard mechanism such as sem_post, sigqueue, mq_send, etc. This all call enter_critical_section and are assumed to be safe in the SMP case.
...
But certain logic interacts with tasks in different ways. The only one that comes to mind are wdogs. There is a tasking interface that to manipulate wdogs, and a different interface in the timer interrupt handling logic to manage wdog expirations.
In the normal case, this is fine. Since the tasking level code calls enter_critical_section, interrupts are disabled an no conflicts can occur. But that may not be the case in the SMP case. Most architectures do not permit disabling interrupts on other CPUs so enter_critical_section must work differently: Locks are required to protect code.
So this change adds locking (via enter_critical section) to wdog expiration logic for the the case if the SMP configuration.
2016-11-18 13:57:30 -06:00
78fd358023
Update some comments.
2016-11-18 08:20:52 -06:00
8602e8a8a9
SMP: irq_csection() has a bad assumption. It assumed that the state of certain variables. That was true on entry into the interrupt handler, but might change to the execution of logic within the interrupt handler.
2016-11-18 07:38:16 -06:00
8e029f019b
Update comments
2016-11-17 17:30:12 -06:00
47b52a2633
Fix an error in manually bringing in Sebastien's changes; Update some comments.
2016-11-17 16:15:06 -06:00
9acd57c819
Fix up some naming and update some comments.
2016-11-17 15:50:39 -06:00
558f4049d4
sched/irq/irq_csection: Fix a bad DEBUG assertion when SMP is enabled.
2016-11-17 15:36:27 -06:00
2c314464a8
Fix a typo in a comment
2016-11-17 08:03:45 -06:00
ccdc11d8ff
Fix typo in variable naming. g_cpu_irqset should be g_cpu_irqlock.
2016-11-17 06:37:24 -06:00
1c1564f0c1
Add logic to handled nested calls to enter_critical_section() from interrupts handlers (with SMP).
2016-11-16 22:45:08 -06:00
0c3207e86e
Fix backward logic in an assertion.
2016-11-16 21:48:27 -06:00
16f0b8fa96
Fix typos in DEBUASSERT statements
2016-11-16 19:58:51 -06:00
f1e4951a8d
Fix some comments
2016-11-16 19:11:31 -06:00
4ca653a1cc
Add some experimental changes to enter/leave_critical_section to deal with the case where interrupts are disabled only on the local CPU
2016-11-16 18:28:35 -06:00
5ce3b399d5
Correct some typos in comments
2016-11-15 16:48:40 -06:00
40d7216a22
Back out 65ab12 and parts of 21f92b
2016-11-15 15:44:43 -06:00
6683f01444
Trivial change to comment
2016-11-15 13:38:43 -06:00
21f92ba601
Review some SMP logic; update comments; refresh configuration.
2016-11-15 09:24:00 -06:00
65ab12fbb9
If SMP is enabled, if any interrupt handler calls enter_critical_section(), it should take the spinlock.
2016-11-15 08:37:58 -06:00
b53866c872
sched/irq: Change order for SMP case in enter_critical_section: Disble local interrupts BEFORE taking spinlock.
2016-11-15 07:54:18 -06:00
9fa1024eef
vector table should have dimension NR_IRQS, not NR_IRQS+1
2016-09-22 07:56:12 -06:00
2a751068e6
Without lowsyslog() *llerr() is not useful. Eliminate and replace with *err().
2016-06-20 12:44:38 -06:00
0c8c7fecf0
Add _ to the beginning of all debug macros to avoid name collisions
2016-06-16 12:33:32 -06:00
13cac3b592
sched/: Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.
2016-06-11 16:42:42 -06:00
e99301d7c2
Rename *lldbg to *llerr
2016-06-11 14:55:27 -06:00
07acd5327a
SMP: Clean CPU0 D-Cache before starting new CPU; Invalidate D-Cache when new CPU started.
2016-05-20 12:39:02 -06:00
32838fcc2c
enter/leave_critical_section: In SMP configuration, may attempt to access the task lists before they have been initialized
2016-05-18 09:17:01 -06:00
d20db82fcb
Scheduler instrumentation: Fix some associated with monitoring critical sections
2016-03-21 17:08:07 -06:00
7f19631338
sched/: Add option to buffer scheduler instrumentation data in memory.
2016-03-17 09:49:43 -06:00
320b70ebad
Update submodules
2016-03-12 13:24:38 -06:00
0fb035f76b
Standardize some naming in code section comments
2016-02-21 18:09:04 -06:00
72d3920295
Rename cpuset_t to cpu_set_t which is the type used in some non-standard Linux/GNU interfaces. Move definitions of cpu_set_t to include/sys/types.h. Add prototypes for sched_setaffinity(), sched_getaffinity(), pthread_attr_setaffinity_np(), pthread_attr_getaffinity_np(), pthread_setaffinity_np(), and pthread_getaffinity_np(). No implementation is yet in place.
2016-02-19 15:57:07 -06:00
b50325bb38
SMP: Add funtions to perform atomic bit set/clear operations; fix two errors in SMP macros
2016-02-17 13:20:01 -06:00
8ac12839c3
leave_critical_section: Fix text of whether spinlock should be released or not
2016-02-17 10:55:18 -06:00
384e51cb05
Add some additional schedule instrumentation
2016-02-16 15:21:45 -06:00
fccef49305
Cosmetic changes to comments
2016-02-15 13:48:08 -06:00
8399938138
SMP: I think we have to spinlock before we are possibly suspended
2016-02-15 10:15:07 -06:00
3c46fa3f9f
Fix a contention problem in the previous critical section design
2016-02-15 08:50:20 -06:00
c7df82147f
SMP: First cut integration of enter/leave_critical_section and the scheduler. There are some issues.
2016-02-15 08:06:17 -06:00
9cb2a6b1f9
Rename irqsave() and irqrestore() to up_irq_save() and up_irq_restore()
2016-02-14 16:19:15 -06:00
6e3107650d
nuttx/sched: Replace irqsave() with enter_critical_section(); replace irqrestore() with leave_critical_section()
2016-02-14 08:17:46 -06:00
d017e3eb2e
SMP: Forgot to add a file before the last commit
2016-02-13 10:25:36 -06:00
97cbd7112f
SMP: Implement enter/leave_critical_section
2016-02-13 10:23:16 -06:00
5b51a9fcdd
Standardize the width of all comment boxes in C files
2015-10-02 17:43:18 -06:00
cb9e27c3b0
Standardize naming used for public data and function groupings
2015-10-02 16:30:35 -06:00
b4423c1eed
Make some file section headers more consistent with standard
2015-04-08 06:47:36 -06:00
322f9f401c
Simplify how C source files are selected in the build
2014-10-07 07:42:36 -06:00
e1769b22f1
Remove os_internal.h it has been replace by several new header files under sched/. There have been some sneak inclusion paths via os_internal.h, so expect a few compilation errors for some architectures
2014-08-08 18:39:28 -06:00
85e8117062
Move interrupt dispatch logic from sched/ to sched/irq
2014-08-08 14:31:15 -06:00
Gregory Nutt