libs: libltpnuma: Fix free memory estimate
On long running systems most of the memory would be consumed by a
file page cache which is reclaimable. Because of that the numa test will
be skipped even if the system has plenty of memory. To fix this this
patch adds 90% of the memory used by the page cache to the free memory
estimate.
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Reviewed-by: Li Wang <liwang@redhat.com>
diff --git a/libs/libltpnuma/tst_numa.c b/libs/libltpnuma/tst_numa.c
index 417d98c..ef4c8e8 100644
--- a/libs/libltpnuma/tst_numa.c
+++ b/libs/libltpnuma/tst_numa.c
@@ -129,6 +129,8 @@
char buf[1024];
long mem_total = 0;
long mem_used = 0;
+ long file_pages = 0;
+ long mem_avail;
/* Make sure there is some space for kernel upkeeping as well */
min_kb += 4096;
@@ -152,6 +154,9 @@
if (sscanf(buf, "%*s %*i MemUsed: %li", &val) == 1)
mem_used = val;
+
+ if (sscanf(buf, "%*s %*i FilePages: %li", &val) == 1)
+ file_pages = val;
}
fclose(fp);
@@ -161,10 +166,12 @@
return 0;
}
- if (mem_total - mem_used < (long)min_kb) {
+ mem_avail = mem_total - mem_used + (9 * file_pages)/10;
+
+ if (mem_avail < (long)min_kb) {
tst_res(TINFO,
"Not enough free RAM on node %i, have %likB needs %zukB",
- node, mem_total - mem_used, min_kb);
+ node, mem_avail, min_kb);
return 0;
}
