From: NeilBrown <neilb@suse.de>
Date: Fri, 23 Dec 2011 03:09:29 +0000 (+1100)
Subject: Subject: bitmap: used 4K aligned buffers when reading the bitmap.
X-Git-Tag: mdadm-3.2.3~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a7322ae12f674e7eb1c7af183d130ae3120de2bd;p=thirdparty%2Fmdadm.git

Subject: bitmap: used 4K aligned buffers when reading the bitmap.

This is needed on 4K block devices such as DASD as we do O_DIRECT
reads.

Do the same alignment for gpt just to be safe.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/bitmap.c b/bitmap.c
index 103706be..c27688c5 100644
--- a/bitmap.c
+++ b/bitmap.c
@@ -132,7 +132,7 @@ bitmap_info_t *bitmap_fd_read(int fd, int brief)
 	void *buf;
 	unsigned int n, skip;
 
-	if (posix_memalign(&buf, 512, 8192) != 0) {
+	if (posix_memalign(&buf, 4096, 8192) != 0) {
 		fprintf(stderr, Name ": failed to allocate 8192 bytes\n");
 		return NULL;
 	}
diff --git a/super-gpt.c b/super-gpt.c
index b8c9aae9..75269bf1 100644
--- a/super-gpt.c
+++ b/super-gpt.c
@@ -76,7 +76,7 @@ static int load_gpt(struct supertype *st, int fd, char *devname)
 
 	free_gpt(st);
 
-	if (posix_memalign((void**)&super, 512, 32*512) != 0) {
+	if (posix_memalign((void**)&super, 4096, 32*512) != 0) {
 		fprintf(stderr, Name ": %s could not allocate superblock\n",
 			__func__);
 		return 1;