From 5ca302c8e502ca53b7d75f12127ec0289904003a Mon Sep 17 00:00:00 2001 From: Glauber Costa Date: Wed, 28 Aug 2013 10:18:18 +1000 Subject: list_lru: dynamically adjust node arrays MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We currently use a compile-time constant to size the node array for the list_lru structure. Due to this, we don't need to allocate any memory at initialization time. But as a consequence, the structures that contain embedded list_lru lists can become way too big (the superblock for instance contains two of them). This patch aims at ameliorating this situation by dynamically allocating the node arrays with the firmware provided nr_node_ids. Signed-off-by: Glauber Costa Cc: Dave Chinner Cc: Mel Gorman Cc: "Theodore Ts'o" Cc: Adrian Hunter Cc: Al Viro Cc: Artem Bityutskiy Cc: Arve Hjønnevåg Cc: Carlos Maiolino Cc: Christoph Hellwig Cc: Chuck Lever Cc: Daniel Vetter Cc: David Rientjes Cc: Gleb Natapov Cc: Greg Thelen Cc: J. Bruce Fields Cc: Jan Kara Cc: Jerome Glisse Cc: John Stultz Cc: KAMEZAWA Hiroyuki Cc: Kent Overstreet Cc: Kirill A. Shutemov Cc: Marcelo Tosatti Cc: Mel Gorman Cc: Steven Whitehouse Cc: Thomas Hellstrom Cc: Trond Myklebust Signed-off-by: Andrew Morton Signed-off-by: Al Viro --- fs/super.c | 11 +++++++++-- fs/xfs/xfs_buf.c | 6 +++++- fs/xfs/xfs_qm.c | 10 ++++++++-- 3 files changed, 22 insertions(+), 5 deletions(-) (limited to 'fs') diff --git a/fs/super.c b/fs/super.c index 181d42e2abff..269d96857caa 100644 --- a/fs/super.c +++ b/fs/super.c @@ -195,8 +195,12 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) INIT_HLIST_NODE(&s->s_instances); INIT_HLIST_BL_HEAD(&s->s_anon); INIT_LIST_HEAD(&s->s_inodes); - list_lru_init(&s->s_dentry_lru); - list_lru_init(&s->s_inode_lru); + + if (list_lru_init(&s->s_dentry_lru)) + goto err_out; + if (list_lru_init(&s->s_inode_lru)) + goto err_out_dentry_lru; + INIT_LIST_HEAD(&s->s_mounts); init_rwsem(&s->s_umount); lockdep_set_class(&s->s_umount, &type->s_umount_key); @@ -236,6 +240,9 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags) } out: return s; + +err_out_dentry_lru: + list_lru_destroy(&s->s_dentry_lru); err_out: security_sb_free(s); #ifdef CONFIG_SMP diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index d46f6a3dc1de..49fdb7bed481 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -1592,6 +1592,7 @@ xfs_free_buftarg( struct xfs_mount *mp, struct xfs_buftarg *btp) { + list_lru_destroy(&btp->bt_lru); unregister_shrinker(&btp->bt_shrinker); if (mp->m_flags & XFS_MOUNT_BARRIER) @@ -1666,9 +1667,12 @@ xfs_alloc_buftarg( if (!btp->bt_bdi) goto error; - list_lru_init(&btp->bt_lru); if (xfs_setsize_buftarg_early(btp, bdev)) goto error; + + if (list_lru_init(&btp->bt_lru)) + goto error; + btp->bt_shrinker.count_objects = xfs_buftarg_shrink_count; btp->bt_shrinker.scan_objects = xfs_buftarg_shrink_scan; btp->bt_shrinker.seeks = DEFAULT_SEEKS; diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index a29169b062e3..7f4138629a80 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -831,11 +831,18 @@ xfs_qm_init_quotainfo( qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); + if ((error = list_lru_init(&qinf->qi_lru))) { + kmem_free(qinf); + mp->m_quotainfo = NULL; + return error; + } + /* * See if quotainodes are setup, and if not, allocate them, * and change the superblock accordingly. */ if ((error = xfs_qm_init_quotainos(mp))) { + list_lru_destroy(&qinf->qi_lru); kmem_free(qinf); mp->m_quotainfo = NULL; return error; @@ -846,8 +853,6 @@ xfs_qm_init_quotainfo( INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS); mutex_init(&qinf->qi_tree_lock); - list_lru_init(&qinf->qi_lru); - /* mutex used to serialize quotaoffs */ mutex_init(&qinf->qi_quotaofflock); @@ -935,6 +940,7 @@ xfs_qm_destroy_quotainfo( qi = mp->m_quotainfo; ASSERT(qi != NULL); + list_lru_destroy(&qi->qi_lru); unregister_shrinker(&qi->qi_shrinker); if (qi->qi_uquotaip) { -- cgit v1.2.3-59-g8ed1b