diff options
| -rw-r--r-- | mm/madvise.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index b5ffbaf616f5..e08639a7c91a 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -1311,6 +1311,64 @@ int madvise_set_anon_name(struct mm_struct *mm, unsigned long start, madvise_vma_anon_name); } #endif /* CONFIG_ANON_VMA_NAME */ + +static noinline unsigned long test_alloc(unsigned long in1, unsigned long in2, size_t size) +{ + switch (in1) + { + case (1): + return __get_free_pages(GFP_KERNEL, 0); + case (2): + return (unsigned long)kmalloc(size, GFP_KERNEL | __GFP_ACCOUNT); + default: + printk("test_alloc invoked with args in1=%lu in2=%lu\n", + in1, in2); + return 0; + } +} + +static noinline void test_free(unsigned long in1, unsigned long in2, unsigned long addr) +{ + switch (in1) + { + case (1): + free_page(addr); + break; + case (2): + kfree((void*)addr); + break; + default: + printk("test_free invoked with args in1=%lu in2=%lu\n", + in1, in2); + break; + } +} + +#define MADV_TEST 25 +static noinline int alloc_bench(unsigned long in1, unsigned long in2) +{ + int i, batch, iter; + unsigned long addr[10]; + + for (iter = 0; iter < 1000000; iter++) { + size_t size = 8; + for (batch = 0; batch < 30; batch++) { + for (i = 0; i < 10; i++) { + addr[i] = test_alloc(in1, in2, size); + } + for (i = 0; i < 10; i++) { + test_free(in1, in2, addr[i]); + } + size += 8; + } + if (fatal_signal_pending(current)) + return -EINTR; + //cond_resched(); + } + + return 0; +} + /* * The madvise(2) system call. * @@ -1390,6 +1448,9 @@ int do_madvise(struct mm_struct *mm, unsigned long start, size_t len_in, int beh size_t len; struct blk_plug plug; + if (behavior == MADV_TEST) + return alloc_bench(start, len_in); + if (!madvise_behavior_valid(behavior)) return -EINVAL; |