From 3d3c10f2ce80d2a19e5e02023c2b7ab7086c36d5 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Tue, 20 Oct 2009 02:39:44 -0500
Subject: GFS2: Improve statfs and quota usability
GFS2 now has three new mount options, statfs_quantum, quota_quantum and
statfs_percent. statfs_quantum and quota_quantum simply allow you to
set the tunables of the same name. Setting setting statfs_quantum to 0
will also turn on the statfs_slow tunable. statfs_percent accepts an
integer between 0 and 100. Numbers between 1 and 100 will cause GFS2 to
do any early sync when the local number of blocks free changes by at
least statfs_percent from the totoal number of blocks free. Setting
statfs_percent to 0 disables this.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---
fs/gfs2/incore.h | 4 ++++
1 file changed, 4 insertions(+)
(limited to 'fs/gfs2/incore.h')
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 6edb423f90b..c239b0f969c 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -430,6 +430,9 @@ struct gfs2_args {
unsigned int ar_discard:1; /* discard requests */
unsigned int ar_errors:2; /* errors=withdraw | panic */
int ar_commit; /* Commit interval */
+ int ar_statfs_quantum; /* The fast statfs interval */
+ int ar_quota_quantum; /* The quota interval */
+ int ar_statfs_percent; /* The % change to force sync */
};
struct gfs2_tune {
@@ -558,6 +561,7 @@ struct gfs2_sbd {
spinlock_t sd_statfs_spin;
struct gfs2_statfs_change_host sd_statfs_master;
struct gfs2_statfs_change_host sd_statfs_local;
+ int sd_statfs_force_sync;
/* Resource group stuff */
--
cgit v1.2.3-70-g09d2
From f25934c5f88655a8d5c3c40a540daed1f0e6dedc Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 30 Oct 2009 08:03:27 +0100
Subject: GFS2: add barrier/nobarrier mount options
Currently gfs2 issues barrier unconditionally. There are various reasons
to disable them, be that just for testing or for stupid devices flushing
large battert backed caches. Add a nobarrier option that matches xfs and
btrfs for this. Also add a symmetric barrier option to turn it back on
at remount time.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---
fs/gfs2/incore.h | 1 +
fs/gfs2/ops_fstype.c | 2 ++
fs/gfs2/super.c | 14 ++++++++++++++
3 files changed, 17 insertions(+)
(limited to 'fs/gfs2/incore.h')
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index c239b0f969c..4792200978c 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -429,6 +429,7 @@ struct gfs2_args {
unsigned int ar_meta:1; /* mount metafs */
unsigned int ar_discard:1; /* discard requests */
unsigned int ar_errors:2; /* errors=withdraw | panic */
+ unsigned int ar_nobarrier:1; /* do not send barriers */
int ar_commit; /* Commit interval */
int ar_statfs_quantum; /* The fast statfs interval */
int ar_quota_quantum; /* The quota interval */
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 9744ee92047..edfee24f363 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1131,6 +1131,8 @@ static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent
}
if (sdp->sd_args.ar_posix_acl)
sb->s_flags |= MS_POSIXACL;
+ if (sdp->sd_args.ar_nobarrier)
+ set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
sb->s_magic = GFS2_MAGIC;
sb->s_op = &gfs2_super_ops;
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index b1dcfab3646..5e4b31441a9 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -73,6 +73,8 @@ enum {
Opt_statfs_quantum,
Opt_statfs_percent,
Opt_quota_quantum,
+ Opt_barrier,
+ Opt_nobarrier,
Opt_error,
};
@@ -107,6 +109,8 @@ static const match_table_t tokens = {
{Opt_statfs_quantum, "statfs_quantum=%d"},
{Opt_statfs_percent, "statfs_percent=%d"},
{Opt_quota_quantum, "quota_quantum=%d"},
+ {Opt_barrier, "barrier"},
+ {Opt_nobarrier, "nobarrier"},
{Opt_error, NULL}
};
@@ -253,6 +257,12 @@ int gfs2_mount_args(struct gfs2_args *args, char *options)
}
args->ar_errors = GFS2_ERRORS_PANIC;
break;
+ case Opt_barrier:
+ args->ar_nobarrier = 0;
+ break;
+ case Opt_nobarrier:
+ args->ar_nobarrier = 1;
+ break;
case Opt_error:
default:
printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o);
@@ -1143,6 +1153,10 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
sb->s_flags |= MS_POSIXACL;
else
sb->s_flags &= ~MS_POSIXACL;
+ if (sdp->sd_args.ar_nobarrier)
+ set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
+ else
+ clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
spin_lock(>->gt_spin);
gt->gt_log_flush_secs = args.ar_commit;
gt->gt_quota_quantum = args.ar_quota_quantum;
--
cgit v1.2.3-70-g09d2