linux-kernel - [PATCH 11/16] zcache/debug: Coalesce all debug under CONFIG_ZCACHE

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Message-Id: <1360811106-2679-12-git-send-email-konrad.wilk@oracle.com>
Date:	Wed, 13 Feb 2013 22:05:01 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	dan.magenheimer@...cle.com, gregkh@...uxfoundation.org
Cc:	sjenning@...ux.vnet.ibm.com, rcj@...ux.vnet.ibm.com,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 11/16] zcache/debug: Coalesce all debug under CONFIG_ZCACHE_DEBUG

and also define this extra attribute in the Kconfig entry.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
 drivers/staging/zcache/Kconfig       | 8 ++++++++
 drivers/staging/zcache/debug.c       | 2 +-
 drivers/staging/zcache/zcache-main.c | 6 +++---
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig
index 7358270..2da6cc4 100644
--- a/drivers/staging/zcache/Kconfig
+++ b/drivers/staging/zcache/Kconfig
@@ -10,6 +10,14 @@ config ZCACHE
 	  memory to store clean page cache pages and swap in RAM,
 	  providing a noticeable reduction in disk I/O.
 
+config ZCACHE_DEBUG
+	bool "Enable debug statistics"
+	depends on DEBUG_FS && ZCACHE
+	default n
+	help
+	  This is used to provide an debugfs directory with counters of
+	  how zcache is doing. You probably want to set this to 'N'.
+
 config RAMSTER
 	bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
 	depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE=y
diff --git a/drivers/staging/zcache/debug.c b/drivers/staging/zcache/debug.c
index cf19adc..e951c64 100644
--- a/drivers/staging/zcache/debug.c
+++ b/drivers/staging/zcache/debug.c
@@ -1,7 +1,7 @@
 #include <linux/atomic.h>
 #include "debug.h"
 
-#ifdef CONFIG_DEBUG_FS
+#ifdef CONFIG_ZCACHE_DEBUG
 #include <linux/debugfs.h>
 
 #define ATTR(x)  { .name = #x, .val = &zcache_##x, }
diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c
index 4b9ee7f..7c0fda4 100644
--- a/drivers/staging/zcache/zcache-main.c
+++ b/drivers/staging/zcache/zcache-main.c
@@ -306,7 +306,7 @@ static void zcache_free_page(struct page *page)
 		max_pageframes = curr_pageframes;
 	if (curr_pageframes < min_pageframes)
 		min_pageframes = curr_pageframes;
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE_DEBUG
 	if (curr_pageframes > 2L || curr_pageframes < -2L) {
 		/* pr_info here */
 	}
@@ -1774,7 +1774,7 @@ static int __init zcache_init(void)
 		old_ops = zcache_cleancache_register_ops();
 		pr_info("%s: cleancache enabled using kernel transcendent "
 			"memory and compression buddies\n", namestr);
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE_DEBUG
 		pr_info("%s: cleancache: ignorenonactive = %d\n",
 			namestr, !disable_cleancache_ignore_nonactive);
 #endif
@@ -1789,7 +1789,7 @@ static int __init zcache_init(void)
 			frontswap_tmem_exclusive_gets(true);
 		pr_info("%s: frontswap enabled using kernel transcendent "
 			"memory and compression buddies\n", namestr);
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE_DEBUG
 		pr_info("%s: frontswap: excl gets = %d active only = %d\n",
 			namestr, frontswap_has_exclusive_gets,
 			!disable_frontswap_ignore_nonactive);
-- 
1.8.0.2

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