gracefully handle full /tmp file system
If /tmp happens to be full, fio gives you a very unhelpful error:
# ./fio rand-write-256k-q256.job
Bus error
Use posix_fallocate() to gracefully handle this condition.
Signed-off-by: Greg Edwards <greg.edwards@hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/smalloc.c b/smalloc.c
index 409998a..4cd8298 100644
--- a/smalloc.c
+++ b/smalloc.c
@@ -10,9 +10,11 @@
#include <unistd.h>
#include <sys/types.h>
#include <limits.h>
+#include <fcntl.h>
#include "mutex.h"
#include "arch/arch.h"
+#include "os/os.h"
#define SMALLOC_REDZONE /* define to detect memory corruption */
@@ -176,7 +178,7 @@
static int add_pool(struct pool *pool, unsigned int alloc_size)
{
- int fd, bitmap_blocks;
+ int fd, bitmap_blocks, ret;
char file[] = "/tmp/.fio_smalloc.XXXXXX";
void *ptr;
@@ -200,6 +202,14 @@
pool->nr_blocks = bitmap_blocks;
pool->free_blocks = bitmap_blocks * SMALLOC_BPB;
+#ifdef FIO_HAVE_FALLOCATE
+ ret = posix_fallocate(fd, 0, alloc_size);
+ if (ret > 0) {
+ fprintf(stderr, "posix_fallocate pool file failed: %s\n", strerror(ret));
+ goto out_unlink;
+ }
+#endif
+
if (ftruncate(fd, alloc_size) < 0)
goto out_unlink;