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Date: Mon, 05 Feb 2007 14:44:04 +0000
From: Steven Whitehouse <swhiteho@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: David Teigland <teigland@...hat.com>, cluster-devel@...hat.com
Subject: [GFS2] make lock_dlm drop_count tunable in sysfs [46/54]
>>From 05acac8420a6e24fc892d0ae88b2f1e7606f8524 Mon Sep 17 00:00:00 2001
From: David Teigland <teigland@...hat.com>
Date: Thu, 25 Jan 2007 14:24:04 -0600
Subject: [PATCH] [GFS2] make lock_dlm drop_count tunable in sysfs
We want to be able to change or disable the default drop_count (number at
which the dlm asks gfs to limit the the number of locks it's holding).
Add it to the collection of sysfs tunables for an fs.
Signed-off-by: David Teigland <teigland@...hat.com>
Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>
diff --git a/fs/gfs2/locking/dlm/main.c b/fs/gfs2/locking/dlm/main.c
index 2194b1d..a0e7eda 100644
--- a/fs/gfs2/locking/dlm/main.c
+++ b/fs/gfs2/locking/dlm/main.c
@@ -11,9 +11,6 @@
#include "lock_dlm.h"
-extern int gdlm_drop_count;
-extern int gdlm_drop_period;
-
extern struct lm_lockops gdlm_ops;
static int __init init_lock_dlm(void)
@@ -40,9 +37,6 @@ static int __init init_lock_dlm(void)
return error;
}
- gdlm_drop_count = GDLM_DROP_COUNT;
- gdlm_drop_period = GDLM_DROP_PERIOD;
-
printk(KERN_INFO
"Lock_DLM (built %s %s) installed\n", __DATE__, __TIME__);
return 0;
diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
index cdd1694..1d8faa3 100644
--- a/fs/gfs2/locking/dlm/mount.c
+++ b/fs/gfs2/locking/dlm/mount.c
@@ -9,8 +9,6 @@
#include "lock_dlm.h"
-int gdlm_drop_count;
-int gdlm_drop_period;
const struct lm_lockops gdlm_ops;
@@ -24,8 +22,8 @@ static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp,
if (!ls)
return NULL;
- ls->drop_locks_count = gdlm_drop_count;
- ls->drop_locks_period = gdlm_drop_period;
+ ls->drop_locks_count = GDLM_DROP_COUNT;
+ ls->drop_locks_period = GDLM_DROP_PERIOD;
ls->fscb = cb;
ls->sdp = sdp;
ls->fsflags = flags;
diff --git a/fs/gfs2/locking/dlm/sysfs.c b/fs/gfs2/locking/dlm/sysfs.c
index 29ae06f..4746b88 100644
--- a/fs/gfs2/locking/dlm/sysfs.c
+++ b/fs/gfs2/locking/dlm/sysfs.c
@@ -116,6 +116,17 @@ static ssize_t recover_status_show(struct gdlm_ls *ls, char *buf)
return sprintf(buf, "%d\n", ls->recover_jid_status);
}
+static ssize_t drop_count_show(struct gdlm_ls *ls, char *buf)
+{
+ return sprintf(buf, "%d\n", ls->drop_locks_count);
+}
+
+static ssize_t drop_count_store(struct gdlm_ls *ls, const char *buf, size_t len)
+{
+ ls->drop_locks_count = simple_strtol(buf, NULL, 0);
+ return len;
+}
+
struct gdlm_attr {
struct attribute attr;
ssize_t (*show)(struct gdlm_ls *, char *);
@@ -135,6 +146,7 @@ GDLM_ATTR(first_done, 0444, first_done_show, NULL);
GDLM_ATTR(recover, 0644, recover_show, recover_store);
GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
+GDLM_ATTR(drop_count, 0644, drop_count_show, drop_count_store);
static struct attribute *gdlm_attrs[] = {
&gdlm_attr_proto_name.attr,
@@ -147,6 +159,7 @@ static struct attribute *gdlm_attrs[] = {
&gdlm_attr_recover.attr,
&gdlm_attr_recover_done.attr,
&gdlm_attr_recover_status.attr,
+ &gdlm_attr_drop_count.attr,
NULL,
};
--
1.4.4.2
-
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