X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=smalloc.c;h=fdf7d22ec4bf2b256f755842d97ec578baaa9fb9;hp=e82ef1da0b59faab23a706db1257808c3fb10bbb;hb=f84622e9c5f4eba6802bcfc6432493ea8c44d740;hpb=2e3e31e36b3565dcc5e36ba3842e7b207799601f

diff --git a/smalloc.c b/smalloc.c
index e82ef1da..fdf7d22e 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 */
 
@@ -20,13 +22,14 @@
 #define SMALLOC_BPI	(sizeof(unsigned int) * 8)
 #define SMALLOC_BPL	(SMALLOC_BPB * SMALLOC_BPI)
 
-#define INITIAL_SIZE	1024*1024	/* new pool size */
+#define INITIAL_SIZE	8192*1024	/* new pool size */
 #define MAX_POOLS	128		/* maximum number of pools to setup */
 
 #define SMALLOC_PRE_RED		0xdeadbeefU
 #define SMALLOC_POST_RED	0x5aa55aa5U
 
 unsigned int smalloc_pool_size = INITIAL_SIZE;
+const int int_mask = sizeof(int) - 1;
 
 struct pool {
 	struct fio_mutex *lock;			/* protects this pool */
@@ -195,10 +198,14 @@ static int add_pool(struct pool *pool, unsigned int alloc_size)
 	bitmap_blocks = alloc_size / SMALLOC_BPL;
 	alloc_size += bitmap_blocks * sizeof(unsigned int);
 	pool->mmap_size = alloc_size;
-	
+
 	pool->nr_blocks = bitmap_blocks;
 	pool->free_blocks = bitmap_blocks * SMALLOC_BPB;
 
+#ifdef FIO_HAVE_FALLOCATE
+	posix_fallocate(fd, 0, alloc_size);
+#endif
+
 	if (ftruncate(fd, alloc_size) < 0)
 		goto out_unlink;
 
@@ -268,9 +275,19 @@ void scleanup(void)
 }
 
 #ifdef SMALLOC_REDZONE
+static void *postred_ptr(struct block_hdr *hdr)
+{
+	unsigned long ptr;
+
+	ptr = (unsigned long) hdr + hdr->size - sizeof(unsigned int);
+	ptr = (ptr + int_mask) & ~int_mask;
+
+	return (void *) ptr;
+}
+
 static void fill_redzone(struct block_hdr *hdr)
 {
-	unsigned int *postred = (void *) hdr + hdr->size - sizeof(unsigned int);
+	unsigned int *postred = postred_ptr(hdr);
 
 	hdr->prered = SMALLOC_PRE_RED;
 	*postred = SMALLOC_POST_RED;
@@ -278,7 +295,7 @@ static void fill_redzone(struct block_hdr *hdr)
 
 static void sfree_check_redzone(struct block_hdr *hdr)
 {
-	unsigned int *postred = (void *) hdr + hdr->size - sizeof(unsigned int);
+	unsigned int *postred = postred_ptr(hdr);
 
 	if (hdr->prered != SMALLOC_PRE_RED) {
 		fprintf(stderr, "smalloc pre redzone destroyed!\n");
@@ -414,8 +431,13 @@ static void *smalloc_pool(struct pool *pool, unsigned int size)
 	unsigned int alloc_size = size + sizeof(struct block_hdr);
 	void *ptr;
 
+	/*
+	 * Round to int alignment, so that the postred pointer will
+	 * be naturally aligned as well.
+	 */
 #ifdef SMALLOC_REDZONE
 	alloc_size += sizeof(unsigned int);
+	alloc_size = (alloc_size + int_mask) & ~int_mask;
 #endif
 
 	ptr = __smalloc_pool(pool, alloc_size);