Changeset 235d31d in mainline for kernel/generic/src/proc/the.c

Timestamp:

2014-12-22T17:47:40Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8c7d5ad

Parents:

eae91e0 (diff), 759ea0d (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge the CHT pre-integration branch

This branch contains:

• the merge of lp:~adam-hraska+lp/helenos/rcu, which brings:

• a new preemptible kernel RCU variant called A-RCU,
• a preemptible variant of Podzimek's non-preemptible kernel RCU and
• a new variant of usersace RCU,
• a new concurrent hash table (CHT) implementation based on RCU,
• a deployment of CHT in kernel futex handling,
• a deployment of the userspace RCU in the implementation of upgradable futexes,

all described in Adam Hraska's master thesis named Read-Copy-Update
for HelenOS, defended in 2013 at MFF UK; furthemore, the branch
fixes two synchronization bugs in condvars and waitq, respectively:

• revid:adam.hraska+hos@gmail.com-20121116144921-3to9u1tn1sg07rg7
• revid:adam.hraska+hos@gmail.com-20121116173623-km7gwtqixwudpe66

• build fixes required to pass make check
• overhaul of ia64 and sparc64 trap handling, to allow exc_dispatch() to be used now when the kernel is more picky about CPU state accounting
• an important fix of the sparc64/sun4v preemptible trap handler
• various other fixes of issues discovered on non-x86 architectures

File:

• kernel/generic/src/proc/the.c (modified) (3 diffs)

kernel/generic/src/proc/the.c

@@ -43 +43 @@
 
 #include <arch.h>
+#include <debug.h>
 
 /** Initialize THE structure
@@ -53 +54 @@
 void the_initialize(the_t *the)
 {
-        the->preemption_disabled = 0;
+        the->preemption = 0;
         the->cpu = NULL;
         the->thread = NULL;
@@ -59 +60 @@
         the->as = NULL;
         the->magic = MAGIC;
+#ifdef RCU_PREEMPT_A    
+        the->rcu_nesting = 0;
+#endif
 }