[Cluster-devel] [GFS2 PATCH] Allocate gfs2_rgrpd from slab memory

[Steven Whitehouse <swhiteho@redhat.com>]

Hi,

Now in the -nmw git tree. Thanks,

Steve.

On Mon, 2008-01-28 at 17:20 -0600, Bob Peterson wrote:
> Hi,
> 
> This patch moves the gfs2_rgrpd structure to its own slab
> memory.  This makes it easier to control and monitor, and 
> yields less memory fragmentation.
> 
> Regards,
> 
> Bob Peterson
> Red Hat GFS
> 
> Signed-off-by: Bob Peterson <rpeterso@redhat.com> 
> --
>  fs/gfs2/main.c |   10 ++++++++++
>  fs/gfs2/rgrp.c |    4 ++--
>  fs/gfs2/util.c |    1 +
>  fs/gfs2/util.h |    1 +
>  4 files changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
> index 9c7765c..053e2eb 100644
> --- a/fs/gfs2/main.c
> +++ b/fs/gfs2/main.c
> @@ -89,6 +89,12 @@ static int __init init_gfs2_fs(void)
>  	if (!gfs2_bufdata_cachep)
>  		goto fail;
>  
> +	gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
> +					      sizeof(struct gfs2_rgrpd),
> +					      0, 0, NULL);
> +	if (!gfs2_rgrpd_cachep)
> +		goto fail;
> +
>  	error = register_filesystem(&gfs2_fs_type);
>  	if (error)
>  		goto fail;
> @@ -108,6 +114,9 @@ fail_unregister:
>  fail:
>  	gfs2_glock_exit();
>  
> +	if (gfs2_rgrpd_cachep)
> +		kmem_cache_destroy(gfs2_rgrpd_cachep);
> +
>  	if (gfs2_bufdata_cachep)
>  		kmem_cache_destroy(gfs2_bufdata_cachep);
>  
> @@ -133,6 +142,7 @@ static void __exit exit_gfs2_fs(void)
>  	unregister_filesystem(&gfs2_fs_type);
>  	unregister_filesystem(&gfs2meta_fs_type);
>  
> +	kmem_cache_destroy(gfs2_rgrpd_cachep);
>  	kmem_cache_destroy(gfs2_bufdata_cachep);
>  	kmem_cache_destroy(gfs2_inode_cachep);
>  	kmem_cache_destroy(gfs2_glock_cachep);
> diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
> index 7b9d6f1..dc7e83e 100644
> --- a/fs/gfs2/rgrp.c
> +++ b/fs/gfs2/rgrp.c
> @@ -353,7 +353,7 @@ static void clear_rgrpdi(struct gfs2_sbd *sdp)
>  		}
>  
>  		kfree(rgd->rd_bits);
> -		kfree(rgd);
> +		kmem_cache_free(gfs2_rgrpd_cachep, rgd);
>  	}
>  }
>  
> @@ -516,7 +516,7 @@ static int read_rindex_entry(struct gfs2_inode *ip,
>  		return error;
>  	}
>  
> -	rgd = kzalloc(sizeof(struct gfs2_rgrpd), GFP_NOFS);
> +	rgd = kmem_cache_zalloc(gfs2_rgrpd_cachep, GFP_NOFS);
>  	error = -ENOMEM;
>  	if (!rgd)
>  		return error;
> diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
> index 424a077..fe9c28e 100644
> --- a/fs/gfs2/util.c
> +++ b/fs/gfs2/util.c
> @@ -25,6 +25,7 @@
>  struct kmem_cache *gfs2_glock_cachep __read_mostly;
>  struct kmem_cache *gfs2_inode_cachep __read_mostly;
>  struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
> +struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
>  
>  void gfs2_assert_i(struct gfs2_sbd *sdp)
>  {
> diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
> index 28938a4..ac0c567 100644
> --- a/fs/gfs2/util.h
> +++ b/fs/gfs2/util.h
> @@ -147,6 +147,7 @@ gfs2_io_error_bh_i((sdp), (bh), __FUNCTION__, __FILE__, __LINE__);
>  extern struct kmem_cache *gfs2_glock_cachep;
>  extern struct kmem_cache *gfs2_inode_cachep;
>  extern struct kmem_cache *gfs2_bufdata_cachep;
> +extern struct kmem_cache *gfs2_rgrpd_cachep;
>  
>  static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
>  					   unsigned int *p)
> 
>