From: Laura Abbott <labbott@redhat.com>
To: Alexander Potapenko <glider@google.com>,
Kees Cook <keescook@chromium.org>
Cc: Laura Abbott <labbott@redhat.com>,
Christoph Lameter <cl@linux.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Kostya Serebryany <kcc@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Sandeep Patil <sspatil@android.com>, Jann Horn <jannh@google.com>,
Marco Elver <elver@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH] lib/test_meminit.c: Add bulk alloc/free tests
Date: Thu, 7 Nov 2019 14:14:47 -0500 [thread overview]
Message-ID: <20191107191447.23058-1-labbott@redhat.com> (raw)
kmem_cache_alloc_bulk/kmem_cache_free_bulk are used to
make multiple allocations of the same size to avoid the
overhead of multiple kmalloc/kfree calls. Extend the kmem_cache
tests to make some calls to these APIs.
Signed-off-by: Laura Abbott <labbott@redhat.com>
---
lib/test_meminit.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/lib/test_meminit.c b/lib/test_meminit.c
index 9729f271d150..20f330948b92 100644
--- a/lib/test_meminit.c
+++ b/lib/test_meminit.c
@@ -183,6 +183,9 @@ static bool __init check_buf(void *buf, int size, bool want_ctor,
return fail;
}
+#define BULK_SIZE 100
+static void *bulk_array[BULK_SIZE];
+
/*
* Test kmem_cache with given parameters:
* want_ctor - use a constructor;
@@ -203,9 +206,24 @@ static int __init do_kmem_cache_size(size_t size, bool want_ctor,
want_rcu ? SLAB_TYPESAFE_BY_RCU : 0,
want_ctor ? test_ctor : NULL);
for (iter = 0; iter < 10; iter++) {
+ /* Do a test of bulk allocations */
+ if (!want_rcu && !want_ctor) {
+ int ret;
+
+ ret = kmem_cache_alloc_bulk(c, alloc_mask, BULK_SIZE, bulk_array);
+ if (!ret) {
+ fail = true;
+ } else {
+ int i;
+ for (i = 0; i < ret; i++)
+ fail |= check_buf(bulk_array[i], size, want_ctor, want_rcu, want_zero);
+ kmem_cache_free_bulk(c, ret, bulk_array);
+ }
+ }
+
buf = kmem_cache_alloc(c, alloc_mask);
/* Check that buf is zeroed, if it must be. */
- fail = check_buf(buf, size, want_ctor, want_rcu, want_zero);
+ fail |= check_buf(buf, size, want_ctor, want_rcu, want_zero);
fill_with_garbage_skip(buf, size, want_ctor ? CTOR_BYTES : 0);
if (!want_rcu) {
--
2.21.0
next reply other threads:[~2019-11-07 19:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-07 19:14 Laura Abbott [this message]
2019-11-07 21:19 ` [PATCH] lib/test_meminit.c: Add bulk alloc/free tests Kees Cook
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