Changeset 4f5e1c7c in mainline

Timestamp:

2012-11-15T23:58:55Z (11 years ago)

Author:

Adam Hraska <adam.hraska+hos@…>

Branches:

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

Children:

497bd656

Parents:

991d2d8

Message:

Commented assert in smp_call.

File:

• kernel/generic/src/smp/smp_call.c (modified) (1 diff)

kernel/generic/src/smp/smp_call.c

@@ -107 +107 @@
         smp_call_t *call_info)
 {
-        /* todo: doc deadlock */
+        /* 
+         * Interrupts must not be disabled or you run the risk of a deadlock 
+         * if both the destination and source cpus try to send an IPI to each
+         * other with interrupts disabled. Because the interrupts are disabled 
+         * the IPIs cannot be delivered and both cpus will forever busy wait 
+         * for an acknowledgment of the IPI from the other cpu.
+         */
         ASSERT(!interrupts_disabled());
         ASSERT(call_info != NULL);