From: Mike Leddy <mike.leddy@gmail.com>
Date: Thu, 4 Jul 2013 04:02:05 +0000 (-0300)
Subject: Avoid abort() in vn_rdwr(): libzpool/kernel.c
X-Git-Url: https://git.camperquake.de/gitweb.cgi?p=zfs.git;a=commitdiff_plain;h=5d3dc3fb72518a4c191e3a014622b74365eb3a74

Avoid abort() in vn_rdwr(): libzpool/kernel.c

Make sure that buffer is aligned to 512 bytes on linux so that
pread call combined with O_DIRECT does not return EINVAL.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1570
---

diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c
index 936974b..a2b6bfe 100644
--- a/cmd/zdb/zdb.c
+++ b/cmd/zdb/zdb.c
@@ -2844,7 +2844,7 @@ zdb_read_block(char *thing, spa_t *spa)
 	psize = size;
 	lsize = size;
 
-	pbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
+	pbuf = umem_alloc_aligned(SPA_MAXBLOCKSIZE, 512, UMEM_NOFAIL);
 	lbuf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
 
 	BP_ZERO(bp);