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[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@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
David Teigland 2007-01-25 14:24:04 -06:00 committed by Steven Whitehouse
parent 2f708649ba
commit ee32e4f3d3
3 changed files with 15 additions and 10 deletions
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6
fs/gfs2/locking/dlm/main.c
View File

@ -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;

6
fs/gfs2/locking/dlm/mount.c
View File

@ -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;

13
fs/gfs2/locking/dlm/sysfs.c
View File

@ -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,
};