Use 4K buffer alignment for superblock allocations

To better accommodate 4K sector drives, use 4K buffer alignment for
superblock buffers.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/super1.c b/super1.c
index 61655ada36f922addf05ceee04127442b4d03c7a..447515b4fd4e3885d181abcab52dc590d0ae306d 100644 (file)
--- a/super1.c
+++ b/super1.c
@@ -843,7 +843,7 @@ static int init_super1(struct supertype *st, mdu_array_info_t *info,
        char defname[10];
        int sbsize;
 
-       if (posix_memalign((void**)&sb, 512, SUPER1_SIZE) != 0) {
+       if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) {
                fprintf(stderr, Name
                        ": %s could not allocate superblock\n", __func__);
                return 0;
@@ -1227,7 +1227,7 @@ static int compare_super1(struct supertype *st, struct supertype *tst)
                return 1;
 
        if (!first) {
-               if (posix_memalign((void**)&first, 512, SUPER1_SIZE) != 0) {
+               if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) {
                        fprintf(stderr, Name
                                ": %s could not allocate superblock\n", __func__);
                        return 1;
@@ -1339,7 +1339,7 @@ static int load_super1(struct supertype *st, int fd, char *devname)
                return 1;
        }
 
-       if (posix_memalign((void**)&super, 512, SUPER1_SIZE) != 0) {
+       if (posix_memalign((void**)&super, 4096, SUPER1_SIZE) != 0) {
                fprintf(stderr, Name ": %s could not allocate superblock\n",
                        __func__);
                return 1;