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| author | Christoph Hellwig <hch@lst.de> | 2009-10-30 07:03:27 (GMT) |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2009-12-03 11:55:54 (GMT) |
| commit | f25934c5f88655a8d5c3c40a540daed1f0e6dedc (patch) | |
| tree | a21e1ab167314292ffe2e3b319c8d5abf5faccd7 /fs/gfs2/super.c | |
| parent | c14f5735e724cb5338ca8298d42b1658008a10d7 (diff) | |
| download | linux-f25934c5f88655a8d5c3c40a540daed1f0e6dedc.tar.xz | |
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>
Diffstat (limited to 'fs/gfs2/super.c')
| -rw-r--r-- | fs/gfs2/super.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index b1dcfab..5e4b314 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; |