linux-kernel - [PATCH 13/19] vmw_balloon: add reset stat

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Message-ID: <20180918063853.198332-14-namit@vmware.com>
Date:   Mon, 17 Sep 2018 23:38:47 -0700
From:   Nadav Amit <namit@...are.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <linux-kernel@...r.kernel.org>, Nadav Amit <namit@...are.com>
Subject: [PATCH 13/19] vmw_balloon: add reset stat

It is useful to expose how many times the balloon resets. If it happens
more than very rarely - this is an indication for a problem.

Reviewed-by: Xavier Deguillard <xdeguillard@...are.com>
Signed-off-by: Nadav Amit <namit@...are.com>
---
 drivers/misc/vmw_balloon.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index cf5e41dd7048..0b3343d84aa8 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -216,7 +216,8 @@ enum vmballoon_stat_page {
 enum vmballoon_stat_general {
 	VMW_BALLOON_STAT_TIMER,
 	VMW_BALLOON_STAT_DOORBELL,
-	VMW_BALLOON_STAT_LAST = VMW_BALLOON_STAT_DOORBELL
+	VMW_BALLOON_STAT_RESET,
+	VMW_BALLOON_STAT_LAST = VMW_BALLOON_STAT_RESET
 };
 
 #define VMW_BALLOON_STAT_NUM		(VMW_BALLOON_STAT_LAST + 1)
@@ -1288,6 +1289,7 @@ static void vmballoon_reset(struct vmballoon *b)
 		vmballoon_deinit_batching(b);
 	}
 
+	vmballoon_stats_gen_inc(b, VMW_BALLOON_STAT_RESET);
 	b->reset_required = false;
 
 	error = vmballoon_vmci_init(b);
@@ -1365,7 +1367,8 @@ static const char * const vmballoon_stat_page_names[] = {
 
 static const char * const vmballoon_stat_names[] = {
 	[VMW_BALLOON_STAT_TIMER]		= "timer",
-	[VMW_BALLOON_STAT_DOORBELL]		= "doorbell"
+	[VMW_BALLOON_STAT_DOORBELL]		= "doorbell",
+	[VMW_BALLOON_STAT_RESET]		= "reset",
 };
 
 static int vmballoon_enable_stats(struct vmballoon *b)
-- 
2.17.1