PERFORCE change 96020 for review
John Birrell
jb at FreeBSD.org
Mon Apr 24 22:17:10 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=96020
Change 96020 by jb at jb_freebsd2 on 2006/04/24 22:16:20
Check if the cpu is present to avoid allocating a buffer when it
isn't required.
Fix the upper bound on the cpu number.
I don't have any multi-cpu machines to test this on.
Affected files ...
.. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_buffer.c#5 edit
Differences ...
==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_buffer.c#5 (text+ko) ====
@@ -148,9 +148,12 @@
int i;
ASSERT(MUTEX_HELD(&dtrace_lock));
- for (i = 0; i < mp_maxid; i++) {
+ for (i = 0; i <= mp_maxid; i++) {
buf = &bufs[i];
+ if (CPU_ABSENT(i))
+ continue;
+
/*
* If there is already a buffer allocated for this CPU, it
* is only possible that this is a DR event. In this case,
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