Add interrupt-related terms to glossary.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/glossary.tex b/glossary.tex
index e8edc623..dd1967b2 100644
--- a/glossary.tex
+++ b/glossary.tex
@@ -187,6 +187,15 @@
 	If necessary, the item is removed from the other CPUs' caches
 	via ``invalidation'' messages from the writing CPUs to any
 	CPUs having a copy in their caches.
+\item[IPI:]
+	Inter-processor interrupt, which is an
+	interrupt sent from one CPU to another.
+	IPIs are used heavily in the Linux kernel, for example, within
+	the scheduler to alert CPUs that a high-priority process is now
+	runnable.
+\item[IRQ:]
+	Interrupt request, often used as an abbreviation for ``interrupt''
+	within the Linux kernel community, as in ``irq handler''.
 \item[Linearizable:]
 	A sequence of operations is ``linearizable'' if there is at
 	least one global ordering of the sequence that is consistent
@@ -233,6 +242,13 @@
 \item[Mutual-Exclusion Mechanism:]
 	A software abstraction that regulates threads' access to
 	``critical sections'' and corresponding data.
+\item[NMI:]
+	Non-maskable interrupt.
+	As the name indicates, this is an extremely high-priority
+	interrupt that cannot be masked.
+	These are used for hardware-specific purposes such as profiling.
+	The advantage of using NMIs for profiling is that it allows you
+	to profile code that runs with interrupts disabled.
 \item[NUCA:]
 	Non-uniform cache architecture, where groups of CPUs share
 	caches.