From: OGAWA Hirofumi It is overkill to update the FS_INFO whenever modifying prev_free/free_clusters, because those are just a hint. So, this patch uses ->write_super() for updating FS_INFO instead. Signed-off-by: OGAWA Hirofumi Signed-off-by: Andrew Morton --- fs/fat/fatent.c | 8 ++++++-- fs/fat/inode.c | 10 ++++++++-- fs/fat/misc.c | 2 -- 3 files changed, 14 insertions(+), 6 deletions(-) diff -puN fs/fat/fatent.c~fat-move-fat_clusters_flush-to-write_super fs/fat/fatent.c --- 25/fs/fat/fatent.c~fat-move-fat_clusters_flush-to-write_super Mon Nov 7 17:01:58 2005 +++ 25-akpm/fs/fat/fatent.c Mon Nov 7 17:01:58 2005 @@ -476,6 +476,7 @@ int fat_alloc_clusters(struct inode *ino sbi->prev_free = entry; if (sbi->free_clusters != -1) sbi->free_clusters--; + sb->s_dirt = 1; cluster[idx_clus] = entry; idx_clus++; @@ -496,6 +497,7 @@ int fat_alloc_clusters(struct inode *ino /* Couldn't allocate the free entries */ sbi->free_clusters = 0; + sb->s_dirt = 1; err = -ENOSPC; out: @@ -509,7 +511,6 @@ out: } for (i = 0; i < nr_bhs; i++) brelse(bhs[i]); - fat_clusters_flush(sb); if (err && idx_clus) fat_free_clusters(inode, cluster[0]); @@ -542,8 +543,10 @@ int fat_free_clusters(struct inode *inod } ops->ent_put(&fatent, FAT_ENT_FREE); - if (sbi->free_clusters != -1) + if (sbi->free_clusters != -1) { sbi->free_clusters++; + sb->s_dirt = 1; + } if (nr_bhs + fatent.nr_bhs > MAX_BUF_PER_PAGE) { if (sb->s_flags & MS_SYNCHRONOUS) { @@ -605,6 +608,7 @@ int fat_count_free_clusters(struct super } while (fat_ent_next(sbi, &fatent)); } sbi->free_clusters = free; + sb->s_dirt = 1; fatent_brelse(&fatent); out: unlock_fat(sbi); diff -puN fs/fat/inode.c~fat-move-fat_clusters_flush-to-write_super fs/fat/inode.c --- 25/fs/fat/inode.c~fat-move-fat_clusters_flush-to-write_super Mon Nov 7 17:01:58 2005 +++ 25-akpm/fs/fat/inode.c Mon Nov 7 17:01:58 2005 @@ -374,12 +374,17 @@ static void fat_clear_inode(struct inode unlock_kernel(); } -static void fat_put_super(struct super_block *sb) +static void fat_write_super(struct super_block *sb) { - struct msdos_sb_info *sbi = MSDOS_SB(sb); + sb->s_dirt = 0; if (!(sb->s_flags & MS_RDONLY)) fat_clusters_flush(sb); +} + +static void fat_put_super(struct super_block *sb) +{ + struct msdos_sb_info *sbi = MSDOS_SB(sb); if (sbi->nls_disk) { unload_nls(sbi->nls_disk); @@ -546,6 +551,7 @@ static struct super_operations fat_sops .write_inode = fat_write_inode, .delete_inode = fat_delete_inode, .put_super = fat_put_super, + .write_super = fat_write_super, .statfs = fat_statfs, .clear_inode = fat_clear_inode, .remount_fs = fat_remount, diff -puN fs/fat/misc.c~fat-move-fat_clusters_flush-to-write_super fs/fat/misc.c --- 25/fs/fat/misc.c~fat-move-fat_clusters_flush-to-write_super Mon Nov 7 17:01:58 2005 +++ 25-akpm/fs/fat/misc.c Mon Nov 7 17:01:58 2005 @@ -67,8 +67,6 @@ void fat_clusters_flush(struct super_blo if (sbi->prev_free != -1) fsinfo->next_cluster = cpu_to_le32(sbi->prev_free); mark_buffer_dirty(bh); - if (sb->s_flags & MS_SYNCHRONOUS) - sync_dirty_buffer(bh); } brelse(bh); } _