Hey there,
I have a patch for aio-stress to align buffer address correctly. Please
have a look. Thanks in advance.
For align buffer address to the number specified by -a option in
aio-stress, it needs to add page_size_mask extra length to total_ram
before call allocation functions. Or it wouldn't be correct in this line
after the allocation:
p = (char *)((intptr_t) (p + page_size_mask) & ~page_size_mask);
Signed-off-by: Han Pingtian <ha...@linux.vnet.ibm.com>
---
testcases/kernel/io/ltp-aiodio/aio-stress.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/testcases/kernel/io/ltp-aiodio/aio-stress.c
b/testcases/kernel/io/ltp-aiodio/aio-stress.c
index 0b7148c..24675ec 100644
--- a/testcases/kernel/io/ltp-aiodio/aio-stress.c
+++ b/testcases/kernel/io/ltp-aiodio/aio-stress.c
@@ -1022,7 +1022,7 @@ int setup_shared_mem(int num_threads, int num_files, int
depth,
if (use_shm == USE_MALLOC) {
p = malloc(total_ram + page_size_mask);
} else if (use_shm == USE_SHM) {
- shm_id = shmget(IPC_PRIVATE, total_ram, IPC_CREAT | 0700);
+ shm_id = shmget(IPC_PRIVATE, total_ram + page_size_mask,
IPC_CREAT | 0700);
if (shm_id < 0) {
perror("shmget");
drop_shm();
@@ -1046,9 +1046,9 @@ int setup_shared_mem(int num_threads, int num_files, int
depth,
goto free_buffers;
}
unlink(mmap_name);
- ftruncate(fd, total_ram);
+ ftruncate(fd, total_ram + page_size_mask);
shm_id = fd;
- p = mmap((char *)0x50000000, total_ram,
+ p = mmap((char *)0x50000000, total_ram + page_size_mask,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED) {
--
1.9.3
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