bump version to 0.7.7-pve1~bpo9

[zfsonlinux.git] / zfs-patches / 0039-Do-not-initiate-MMP-writes-while-pool-is-suspended.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Olaf Faaland <faaland1@llnl.gov>
Date: Thu, 22 Feb 2018 09:14:46 -0800
Subject: [PATCH] Do not initiate MMP writes while pool is suspended
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While the pool is suspended on host A, it may be imported on host B.
If host A continued to write MMP blocks, it would be blindly
overwriting MMP blocks written by host B, and the blocks written by
host A would have outdated txg information.

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Closes #7182
(cherry picked from commit b1f61f05b4b2edc77ec5f3d28d041d7b3c873f01)
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
 module/zfs/mmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/module/zfs/mmp.c b/module/zfs/mmp.c
index 1dfb7c05b..d003d79de 100644
--- a/module/zfs/mmp.c
+++ b/module/zfs/mmp.c
@@ -437,7 +437,7 @@ mmp_thread(spa_t *spa)
 			zio_suspend(spa, NULL);
 		}
 
-		if (multihost)
+		if (multihost && !suspended)
 			mmp_write_uberblock(spa);
 
 		CALLB_CPR_SAFE_BEGIN(&cpr);
-- 
2.14.2