[LTP] [PATCH] ltp: handle missing online file

[Dave Kleikamp <dave.kleikamp@oracle.com>]

gather_node_cpus() fails if the /sys/devices/system/node/nodeX/cpuX/online
file is missing for any cpu other than cpu0. The absence of the online file
should not be treated as a failure, but as an indication that the cpu is
not hot-pluggable and cannot be taken offline.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>

diff --git a/testcases/kernel/mem/lib/mem.c b/testcases/kernel/mem/lib/mem.c
index 9bc926e..99243a6 100644
--- a/testcases/kernel/mem/lib/mem.c
+++ b/testcases/kernel/mem/lib/mem.c
@@ -786,16 +786,14 @@ static void gather_node_cpus(char *cpus, long nd)
 		if (path_exist(path, nd, i)) {
 			snprintf(path1, BUFSIZ, "%s/online", path);
 			/*
-			 * No cpu0/online knob, as it can't support to
-			 * on/offline cpu0, so if the 'nd' node contains
-			 * cpu0, it should skip to check cpu0/online's value.
+			 * if there is no online knob, then the cpu cannot
+			 * be taken offline
 			 */
-			if (i == 0)
-				goto next;
-			SAFE_FILE_SCANF(cleanup, path1, "%ld", &online);
-			if (online == 0)
-				continue;
-next:
+			if (path_exist(path1)) {
+				SAFE_FILE_SCANF(cleanup, path1, "%ld", &online);
+				if (online == 0)
+					continue;
+			}
 			sprintf(buf, "%d,", i);
 			strcat(cpus, buf);
 		}

------------------------------------------------------------------------------
Introducing Performance Central, a new site from SourceForge and 
AppDynamics. Performance Central is your source for news, insights, 
analysis and resources for efficient Application Performance Management. 
Visit us today!
http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk
_______________________________________________
Ltp-list mailing list
Ltp-list@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/ltp-list