Changeset 54293 in vbox

Timestamp:

Feb 19, 2015 1:00:11 PM (10 years ago)

Author:

vboxsync

Message:

doc update.

File:

• trunk/include/iprt/mp.h (modified) (1 diff)

trunk/include/iprt/mp.h

@@ -344 +344 @@
  * Notification callback.
  *
- * The context this is called in differs a bit from platform to
- * platform, so be careful while in here.
+ * The context this is called in differs a bit from platform to platform, so be
+ * careful while in here.
+ *
+ * On Windows we're running with IRQL=PASSIVE_LEVEL according to the
+ * KeRegisterProcessorChangeCallback documentation - unrestricted API access.
+ * Probably not being called on the onlined/offlined CPU...
+ *
+ * On Solaris we're holding the cpu_lock, IPL/SPL/PIL is not yet known.  Looks
+ * like we're being called on the CPU that's being onlined/offlined.
+ *
+ * On Linux it looks like we're called on the CPU in question.  Interrupts may
+ * be disabled, it seems.
+ *
+ * There is no callbacks for darwin at the moment, due to lack of suitable KPI.
  *
  * @param   idCpu       The CPU this applies to.