The mlock and stack_grow_into_huge testcases require very large
amounts of locked memory and stack space respectively - larger than
the default ulimits set by some distros.
Originally, I avoided having the testcases or the wrapper script set
the ulimits for these tests so that the whole test script could be run
without root. However, these days the testsuite does require root and
uses it to set some other system limits (e.g. the shm segment size
limits). So, it's silly not to set the stack and locked memory limits
for these tests as well.
Therefore, this patch adds code to temporarily adjust the relevant
rlimits around these testcases.
Signed-off-by: David Gibson <d...@au1.ibm.com>
Index: libhugetlbfs/tests/run_tests.py
===================================================================
--- libhugetlbfs.orig/tests/run_tests.py 2009-08-20 12:00:15.000000000
+1000
+++ libhugetlbfs/tests/run_tests.py 2009-08-20 12:09:34.000000000 +1000
@@ -4,6 +4,7 @@ import subprocess
import os
import sys
import getopt
+import resource
# The superset of wordsizes that should be tested (default 32, 64)
wordsizes = set()
@@ -311,6 +312,15 @@ def do_test(cmd, pre="", bits=None, desc
for b in (set(bits) & wordsizes_by_pagesize[p]):
run_test(p, b, cmd, pre, desc)
+def do_test_with_rlimit(rtype, limit, cmd, pre="", bits=None, desc=""):
+ """
+ Run a test case with a temporarily altered resource limit.
+ """
+ oldlimit = resource.getrlimit(rtype)
+ resource.setrlimit(rtype, (limit, limit))
+ do_test(cmd, pre, bits, desc)
+ resource.setrlimit(rtype, oldlimit)
+
def do_elflink_test(cmd, pre="", desc=""):
"""
Run an elflink test case, skipping known-bad configurations.
@@ -461,7 +471,7 @@ def functional_tests():
do_test("truncate")
do_test("shared")
do_test("mprotect")
- do_test("mlock")
+ do_test_with_rlimit(resource.RLIMIT_MEMLOCK, -1, "mlock")
do_test("misalign")
# Specific kernel bug tests
@@ -476,7 +486,7 @@ def functional_tests():
do_test("truncate_above_4GB")
do_test("brk_near_huge")
do_test("task-size-overrun")
- do_test("stack_grow_into_huge")
+ do_test_with_rlimit(resource.RLIMIT_STACK, -1, "stack_grow_into_huge")
if dangerous == 1:
do_test("readahead_reserve")
do_test("madvise_reserve")
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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