From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Tue, 20 Mar 2012 21:01:04 +0000 (+1100)
Subject: Use 4K buffer alignment for superblock allocations
X-Git-Tag: mdadm-3.2.4~61
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3c0bcd460908469613fae3bdf25e191f9d65e70b;p=thirdparty%2Fmdadm.git

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 61655ada..447515b4 100644
--- 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;