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| author | Thomas Graf <tgraf@suug.ch> | 2015-05-01 00:37:45 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-04 05:08:54 +0200 |
| commit | 67b7cbf4203f7e6682a2dc17fc83a6a6cd5a3376 (patch) | |
| tree | a0661f5ac8e8a10a2a0cbd12dbba82dd41c82e19 /lib/test_rhashtable.c | |
| parent | rhashtable-test: Use walker to test bucket statistics (diff) | |
| download | linux-67b7cbf4203f7e6682a2dc17fc83a6a6cd5a3376.tar.xz linux-67b7cbf4203f7e6682a2dc17fc83a6a6cd5a3376.zip | |
rhashtable-test: Detect insertion failures
Account for failed inserts due to memory pressure or EBUSY and
ignore failed entries during the consistency check.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/test_rhashtable.c')
| -rw-r--r-- | lib/test_rhashtable.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/lib/test_rhashtable.c b/lib/test_rhashtable.c index 3a9a3d9c0cbf..6893e57e6782 100644 --- a/lib/test_rhashtable.c +++ b/lib/test_rhashtable.c @@ -21,8 +21,8 @@ #include <linux/rhashtable.h> #include <linux/slab.h> - #define MAX_ENTRIES 1000000 +#define TEST_INSERT_FAIL INT_MAX static int entries = 50000; module_param(entries, int, 0); @@ -68,6 +68,9 @@ static int __init test_rht_lookup(struct rhashtable *ht) bool expected = !(i % 2); u32 key = i; + if (array[i / 2].value == TEST_INSERT_FAIL) + expected = false; + obj = rhashtable_lookup_fast(ht, &key, test_rht_params); if (expected && !obj) { @@ -135,7 +138,7 @@ static s64 __init test_rhashtable(struct rhashtable *ht) { struct test_obj *obj; int err; - unsigned int i; + unsigned int i, insert_fails = 0; s64 start, end; /* @@ -150,10 +153,19 @@ static s64 __init test_rhashtable(struct rhashtable *ht) obj->value = i * 2; err = rhashtable_insert_fast(ht, &obj->node, test_rht_params); - if (err) + if (err == -ENOMEM || err == -EBUSY) { + /* Mark failed inserts but continue */ + obj->value = TEST_INSERT_FAIL; + insert_fails++; + } else if (err) { return err; + } } + if (insert_fails) + pr_info(" %u insertions failed due to memory pressure\n", + insert_fails); + test_bucket_stats(ht); rcu_read_lock(); test_rht_lookup(ht); @@ -165,10 +177,12 @@ static s64 __init test_rhashtable(struct rhashtable *ht) for (i = 0; i < entries; i++) { u32 key = i * 2; - obj = rhashtable_lookup_fast(ht, &key, test_rht_params); - BUG_ON(!obj); + if (array[i].value != TEST_INSERT_FAIL) { + obj = rhashtable_lookup_fast(ht, &key, test_rht_params); + BUG_ON(!obj); - rhashtable_remove_fast(ht, &obj->node, test_rht_params); + rhashtable_remove_fast(ht, &obj->node, test_rht_params); + } } end = ktime_get_ns(); |