staging: lustre: libcfs: allocate memory in cfs_crypto_performance_test()

Move memory allocation from cfs_crypto_test_hashes() into the
function cfs_crypto_performance_test().

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5053
Reviewed-on: http://review.whamcloud.com/9990
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c
index 90d6e08..4857a11 100644 (file)
--- a/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c
+++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-crypto.c
@@ -307,16 +307,27 @@ EXPORT_SYMBOL(cfs_crypto_hash_final);
  * \param[in] buf      data buffer on which to compute the hash
  * \param[in] buf_len  length of \buf on which to compute hash
  */
-static void cfs_crypto_performance_test(enum cfs_crypto_hash_alg hash_alg,
-                                       const unsigned char *buf,
-                                       unsigned int buf_len)
+static void cfs_crypto_performance_test(enum cfs_crypto_hash_alg hash_alg)
 {
+       int buf_len = max(PAGE_SIZE, 1048576UL);
+       void *buf;
        unsigned long              start, end;
        int                          bcount, err = 0;
        int                          sec = 1; /* do test only 1 sec */
+       struct page *page;
        unsigned char hash[CFS_CRYPTO_HASH_DIGESTSIZE_MAX];
        unsigned int hash_len = sizeof(hash);
 
+       page = alloc_page(GFP_KERNEL);
+       if (!page) {
+               err = -ENOMEM;
+               goto out_err;
+       }
+
+       buf = kmap(page);
+       memset(buf, 0xAD, PAGE_SIZE);
+       kunmap(page);
+
        for (start = jiffies, end = start + sec * HZ, bcount = 0;
             time_before(jiffies, end); bcount++) {
                err = cfs_crypto_hash_digest(hash_alg, buf, buf_len, NULL, 0,
@@ -325,7 +336,8 @@ static void cfs_crypto_performance_test(enum cfs_crypto_hash_alg hash_alg,
                        break;
        }
        end = jiffies;
-
+       __free_page(page);
+out_err:
        if (err) {
                cfs_crypto_hash_speeds[hash_alg] =  -1;
                CDEBUG(D_INFO, "Crypto hash algorithm %s, err = %d\n",
@@ -381,25 +393,11 @@ EXPORT_SYMBOL(cfs_crypto_hash_speed);
  */
 static int cfs_crypto_test_hashes(void)
 {
-       unsigned char      i;
-       unsigned char      *data;
-       unsigned int        j;
-       /* Data block size for testing hash. Maximum
-        * kmalloc size for 2.6.18 kernel is 128K
-        */
-       unsigned int        data_len = 1 * 128 * 1024;
-
-       data = kmalloc(data_len, 0);
-       if (!data)
-               return -ENOMEM;
-
-       for (j = 0; j < data_len; j++)
-               data[j] = j & 0xff;
+       enum cfs_crypto_hash_alg hash_alg;
 
-       for (i = 0; i < CFS_HASH_ALG_MAX; i++)
-               cfs_crypto_performance_test(i, data, data_len);
+       for (hash_alg = 0; hash_alg < CFS_HASH_ALG_MAX; hash_alg++)
+               cfs_crypto_performance_test(hash_alg);
 
-       kfree(data);
        return 0;
 }