Remove the global inode_lock, as it doesn't protect anything. Signed-off-by: Nick Piggin --- fs/buffer.c | 2 - fs/drop_caches.c | 4 -- fs/fs-writeback.c | 35 ++++------------------- fs/hugetlbfs/inode.c | 2 - fs/inode.c | 65 ++------------------------------------------ fs/notify/inode_mark.c | 14 +++++---- fs/notify/inotify/inotify.c | 16 ++++++---- fs/quota/dquot.c | 6 ---- include/linux/writeback.h | 1 mm/backing-dev.c | 4 -- 10 files changed, 30 insertions(+), 119 deletions(-) Index: linux-2.6/fs/buffer.c =================================================================== --- linux-2.6.orig/fs/buffer.c +++ linux-2.6/fs/buffer.c @@ -1144,7 +1144,7 @@ __getblk_slow(struct block_device *bdev, * inode list. * * mark_buffer_dirty() is atomic. It takes bh->b_page->mapping->private_lock, - * mapping->tree_lock and the global inode_lock. + * and mapping->tree_lock. */ void mark_buffer_dirty(struct buffer_head *bh) { Index: linux-2.6/fs/drop_caches.c =================================================================== --- linux-2.6.orig/fs/drop_caches.c +++ linux-2.6/fs/drop_caches.c @@ -16,7 +16,6 @@ static void drop_pagecache_sb(struct sup { struct inode *inode, *toput_inode = NULL; - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { spin_lock(&inode->i_lock); @@ -28,15 +27,12 @@ static void drop_pagecache_sb(struct sup __iget(inode); spin_unlock(&inode->i_lock); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); invalidate_mapping_pages(inode->i_mapping, 0, -1); iput(toput_inode); toput_inode = inode; - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); } spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); iput(toput_inode); } Index: linux-2.6/fs/fs-writeback.c =================================================================== --- linux-2.6.orig/fs/fs-writeback.c +++ linux-2.6/fs/fs-writeback.c @@ -312,7 +312,7 @@ static void requeue_io(struct inode *ino static void inode_sync_complete(struct inode *inode) { /* - * Prevent speculative execution through spin_unlock(&inode_lock); + * Prevent speculative execution through spin_unlock(&inode->i_lock); */ smp_mb(); wake_up_bit(&inode->i_state, __I_SYNC); @@ -404,9 +404,7 @@ static void inode_wait_for_writeback(str while (inode->i_state & I_SYNC) { spin_unlock(&wb_inode_list_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); __wait_on_bit(wqh, &wq, inode_wait, TASK_UNINTERRUPTIBLE); - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&wb_inode_list_lock); } @@ -464,7 +462,6 @@ writeback_single_inode(struct inode *ino inode->i_state &= ~I_DIRTY_PAGES; spin_unlock(&wb_inode_list_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); ret = do_writepages(mapping, wbc); @@ -484,12 +481,10 @@ writeback_single_inode(struct inode *ino * due to delalloc, clear dirty metadata flags right before * write_inode() */ - spin_lock(&inode_lock); spin_lock(&inode->i_lock); dirty = inode->i_state & I_DIRTY; inode->i_state &= ~(I_DIRTY_SYNC | I_DIRTY_DATASYNC); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); /* Don't write the inode if only I_DIRTY_PAGES was set */ if (dirty & (I_DIRTY_SYNC | I_DIRTY_DATASYNC)) { int err = write_inode(inode, wbc); @@ -497,7 +492,6 @@ writeback_single_inode(struct inode *ino ret = err; } - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&wb_inode_list_lock); inode->i_state &= ~I_SYNC; @@ -679,10 +673,8 @@ again: } spin_unlock(&wb_inode_list_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); iput(inode); cond_resched(); - spin_lock(&inode_lock); spin_lock(&wb_inode_list_lock); if (wbc->nr_to_write <= 0) { wbc->more_io = 1; @@ -701,7 +693,6 @@ static void writeback_inodes_wb(struct b int ret = 0; wbc->wb_start = jiffies; /* livelock avoidance */ - spin_lock(&inode_lock); again: spin_lock(&wb_inode_list_lock); @@ -744,7 +735,6 @@ again: break; } spin_unlock(&wb_inode_list_lock); - spin_unlock(&inode_lock); /* Leave any unwritten inodes on b_io */ } @@ -857,21 +847,18 @@ static long wb_writeback(struct bdi_writ * we'll just busyloop. */ retry: - spin_lock(&inode_lock); spin_lock(&wb_inode_list_lock); if (!list_empty(&wb->b_more_io)) { inode = list_entry(wb->b_more_io.prev, struct inode, i_list); if (!spin_trylock(&inode->i_lock)) { spin_unlock(&wb_inode_list_lock); - spin_unlock(&inode_lock); goto retry; } inode_wait_for_writeback(inode); spin_unlock(&inode->i_lock); } spin_unlock(&wb_inode_list_lock); - spin_unlock(&inode_lock); } return wrote; @@ -1141,7 +1128,6 @@ void __mark_inode_dirty(struct inode *in if (unlikely(block_dump)) block_dump___mark_inode_dirty(inode); - spin_lock(&inode_lock); spin_lock(&inode->i_lock); if ((inode->i_state & flags) != flags) { const int was_dirty = inode->i_state & I_DIRTY; @@ -1190,7 +1176,6 @@ void __mark_inode_dirty(struct inode *in } out: spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); } EXPORT_SYMBOL(__mark_inode_dirty); @@ -1221,7 +1206,6 @@ static void wait_sb_inodes(struct super_ */ WARN_ON(!rwsem_is_locked(&sb->s_umount)); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); /* @@ -1246,14 +1230,12 @@ static void wait_sb_inodes(struct super_ __iget(inode); spin_unlock(&inode->i_lock); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); /* - * We hold a reference to 'inode' so it couldn't have - * been removed from s_inodes list while we dropped the - * inode_lock. We cannot iput the inode now as we can - * be holding the last reference and we cannot iput it - * under inode_lock. So we keep the reference and iput - * it later. + * We hold a reference to 'inode' so it couldn't have been + * removed from s_inodes list while we dropped the + * sb_inode_list_lock. We cannot iput the inode now as we can + * be holding the last reference and we cannot iput it under + * spinlock. So we keep the reference and iput it later. */ iput(old_inode); old_inode = inode; @@ -1262,11 +1244,9 @@ static void wait_sb_inodes(struct super_ cond_resched(); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); } spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); iput(old_inode); } @@ -1348,13 +1328,11 @@ int write_inode_now(struct inode *inode, wbc.nr_to_write = 0; might_sleep(); - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&wb_inode_list_lock); ret = writeback_single_inode(inode, &wbc); spin_unlock(&wb_inode_list_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); if (sync) inode_sync_wait(inode); return ret; @@ -1376,13 +1354,11 @@ int sync_inode(struct inode *inode, stru { int ret; - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&wb_inode_list_lock); ret = writeback_single_inode(inode, wbc); spin_unlock(&wb_inode_list_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); return ret; } EXPORT_SYMBOL(sync_inode); Index: linux-2.6/fs/hugetlbfs/inode.c =================================================================== --- linux-2.6.orig/fs/hugetlbfs/inode.c +++ linux-2.6/fs/hugetlbfs/inode.c @@ -377,7 +377,7 @@ static void hugetlbfs_delete_inode(struc clear_inode(inode); } -static void hugetlbfs_forget_inode(struct inode *inode) __releases(inode_lock) +static void hugetlbfs_forget_inode(struct inode *inode) { if (generic_detach_inode(inode)) { truncate_hugepages(inode, 0); Index: linux-2.6/fs/inode.c =================================================================== --- linux-2.6.orig/fs/inode.c +++ linux-2.6/fs/inode.c @@ -105,7 +105,6 @@ static struct hlist_head *inode_hashtabl * NOTE! You also have to own the lock if you change * the i_state of an inode while it is in use.. */ -DEFINE_SPINLOCK(inode_lock); DEFINE_SPINLOCK(sb_inode_list_lock); DEFINE_SPINLOCK(wb_inode_list_lock); DEFINE_SPINLOCK(inode_hash_lock); @@ -376,16 +375,14 @@ static void dispose_list(struct list_hea truncate_inode_pages(&inode->i_data, 0); clear_inode(inode); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); spin_lock(&inode->i_lock); spin_lock(&inode_hash_lock); hlist_del_init(&inode->i_hash); spin_unlock(&inode_hash_lock); list_del_init(&inode->i_sb_list); - spin_unlock(&sb_inode_list_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); + spin_unlock(&sb_inode_list_lock); wake_up_inode(inode); destroy_inode(inode); @@ -413,7 +410,6 @@ static int invalidate_list(struct list_h * change during umount anymore, and because iprune_sem keeps * shrink_icache_memory() away. */ - cond_resched_lock(&inode_lock); cond_resched_lock(&sb_inode_list_lock); next = next->next; @@ -458,13 +454,11 @@ int invalidate_inodes(struct super_block LIST_HEAD(throw_away); down_write(&iprune_sem); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); inotify_unmount_inodes(&sb->s_inodes); fsnotify_unmount_inodes(&sb->s_inodes); busy = invalidate_list(&sb->s_inodes, &throw_away); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); dispose_list(&throw_away); up_write(&iprune_sem); @@ -507,7 +501,6 @@ static void prune_icache(int nr_to_scan) unsigned long reap = 0; down_read(&iprune_sem); - spin_lock(&inode_lock); again: spin_lock(&wb_inode_list_lock); for (nr_scanned = 0; nr_scanned < nr_to_scan; nr_scanned++) { @@ -531,12 +524,10 @@ again: spin_unlock(&wb_inode_list_lock); __iget(inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); if (remove_inode_buffers(inode)) reap += invalidate_mapping_pages(&inode->i_data, 0, -1); iput(inode); - spin_lock(&inode_lock); again2: spin_lock(&wb_inode_list_lock); @@ -563,7 +554,6 @@ again2: __count_vm_events(KSWAPD_INODESTEAL, reap); else __count_vm_events(PGINODESTEAL, reap); - spin_unlock(&inode_lock); spin_unlock(&wb_inode_list_lock); dispose_list(&freeable); @@ -714,12 +704,10 @@ void inode_add_to_lists(struct super_blo { struct hlist_head *head = inode_hashtable + hash(sb, inode->i_ino); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); spin_lock(&inode->i_lock); __inode_add_to_lists(sb, head, inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); } EXPORT_SYMBOL_GPL(inode_add_to_lists); @@ -745,18 +733,14 @@ struct inode *new_inode(struct super_blo static atomic_t last_ino = ATOMIC_INIT(0); struct inode *inode; - spin_lock_prefetch(&inode_lock); - inode = alloc_inode(sb); if (inode) { - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); spin_lock(&inode->i_lock); inode->i_ino = atomic_inc_return(&last_ino); inode->i_state = 0; __inode_add_to_lists(sb, NULL, inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); } return inode; } @@ -815,7 +799,6 @@ static struct inode *get_new_inode(struc if (inode) { struct inode *old; - spin_lock(&inode_lock); /* We released the lock, so.. */ old = find_inode(sb, head, test, data); if (!old) { @@ -827,7 +810,6 @@ static struct inode *get_new_inode(struc inode->i_state = I_NEW; __inode_add_to_lists(sb, head, inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); /* Return the locked inode with I_NEW set, the * caller is responsible for filling in the contents @@ -842,7 +824,6 @@ static struct inode *get_new_inode(struc */ __iget(old); spin_unlock(&old->i_lock); - spin_unlock(&inode_lock); destroy_inode(inode); inode = old; wait_on_inode(inode); @@ -852,7 +833,6 @@ static struct inode *get_new_inode(struc set_failed: spin_unlock(&inode->i_lock); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); destroy_inode(inode); return NULL; } @@ -870,7 +850,6 @@ static struct inode *get_new_inode_fast( if (inode) { struct inode *old; - spin_lock(&inode_lock); /* We released the lock, so.. */ old = find_inode_fast(sb, head, ino); if (!old) { @@ -880,7 +859,6 @@ static struct inode *get_new_inode_fast( inode->i_state = I_NEW; __inode_add_to_lists(sb, head, inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); /* Return the locked inode with I_NEW set, the * caller is responsible for filling in the contents @@ -895,7 +873,6 @@ static struct inode *get_new_inode_fast( */ __iget(old); spin_unlock(&old->i_lock); - spin_unlock(&inode_lock); destroy_inode(inode); inode = old; wait_on_inode(inode); @@ -945,7 +922,6 @@ ino_t iunique(struct super_block *sb, in struct hlist_head *head; ino_t res; - spin_lock(&inode_lock); spin_lock(&unique_lock); do { if (counter <= max_reserved) @@ -954,7 +930,6 @@ ino_t iunique(struct super_block *sb, in head = inode_hashtable + hash(sb, res); } while (!test_inode_iunique(sb, head, res)); spin_unlock(&unique_lock); - spin_unlock(&inode_lock); return res; } @@ -964,7 +939,6 @@ struct inode *igrab(struct inode *inode) { struct inode *ret = inode; - spin_lock(&inode_lock); spin_lock(&inode->i_lock); if (!(inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE))) __iget(inode); @@ -976,7 +950,6 @@ struct inode *igrab(struct inode *inode) */ ret = NULL; spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); return ret; } @@ -1007,17 +980,14 @@ static struct inode *ifind(struct super_ { struct inode *inode; - spin_lock(&inode_lock); inode = find_inode(sb, head, test, data); if (inode) { __iget(inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); if (likely(wait)) wait_on_inode(inode); return inode; } - spin_unlock(&inode_lock); return NULL; } @@ -1041,16 +1011,13 @@ static struct inode *ifind_fast(struct s { struct inode *inode; - spin_lock(&inode_lock); inode = find_inode_fast(sb, head, ino); if (inode) { __iget(inode); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); wait_on_inode(inode); return inode; } - spin_unlock(&inode_lock); return NULL; } @@ -1214,7 +1181,6 @@ int insert_inode_locked(struct inode *in struct hlist_node *node; struct inode *old = NULL; - spin_lock(&inode_lock); repeat: spin_lock(&inode_hash_lock); hlist_for_each_entry(old, node, head, i_hash) { @@ -1233,13 +1199,11 @@ repeat: if (likely(!node)) { hlist_add_head(&inode->i_hash, head); spin_unlock(&inode_hash_lock); - spin_unlock(&inode_lock); return 0; } spin_unlock(&inode_hash_lock); __iget(old); spin_unlock(&old->i_lock); - spin_unlock(&inode_lock); wait_on_inode(old); if (unlikely(!hlist_unhashed(&old->i_hash))) { iput(old); @@ -1262,7 +1226,6 @@ int insert_inode_locked4(struct inode *i struct hlist_node *node; struct inode *old = NULL; - spin_lock(&inode_lock); repeat: spin_lock(&inode_hash_lock); hlist_for_each_entry(old, node, head, i_hash) { @@ -1281,13 +1244,11 @@ repeat: if (likely(!node)) { hlist_add_head(&inode->i_hash, head); spin_unlock(&inode_hash_lock); - spin_unlock(&inode_lock); return 0; } spin_unlock(&inode_hash_lock); __iget(old); spin_unlock(&old->i_lock); - spin_unlock(&inode_lock); wait_on_inode(old); if (unlikely(!hlist_unhashed(&old->i_hash))) { iput(old); @@ -1310,13 +1271,11 @@ void __insert_inode_hash(struct inode *i { struct hlist_head *head = inode_hashtable + hash(inode->i_sb, hashval); - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&inode_hash_lock); hlist_add_head(&inode->i_hash, head); spin_unlock(&inode_hash_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); } EXPORT_SYMBOL(__insert_inode_hash); @@ -1328,13 +1287,11 @@ EXPORT_SYMBOL(__insert_inode_hash); */ void remove_inode_hash(struct inode *inode) { - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&inode_hash_lock); hlist_del_init(&inode->i_hash); spin_unlock(&inode_hash_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); } EXPORT_SYMBOL(remove_inode_hash); @@ -1362,7 +1319,6 @@ void generic_delete_inode(struct inode * WARN_ON(inode->i_state & I_NEW); inode->i_state |= I_FREEING; spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); atomic_dec(&inodes_stat.nr_inodes); if (op->delete_inode) { @@ -1376,13 +1332,11 @@ void generic_delete_inode(struct inode * truncate_inode_pages(&inode->i_data, 0); clear_inode(inode); } - spin_lock(&inode_lock); spin_lock(&inode->i_lock); spin_lock(&inode_hash_lock); hlist_del_init(&inode->i_hash); spin_unlock(&inode_hash_lock); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); wake_up_inode(inode); BUG_ON(inode->i_state != I_CLEAR); destroy_inode(inode); @@ -1412,16 +1366,13 @@ int generic_detach_inode(struct inode *i if (sb->s_flags & MS_ACTIVE) { spin_unlock(&inode->i_lock); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); return 0; } WARN_ON(inode->i_state & I_NEW); inode->i_state |= I_WILL_FREE; spin_unlock(&inode->i_lock); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); write_inode_now(inode, 1); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); spin_lock(&inode->i_lock); WARN_ON(inode->i_state & I_NEW); @@ -1439,7 +1390,6 @@ int generic_detach_inode(struct inode *i WARN_ON(inode->i_state & I_NEW); inode->i_state |= I_FREEING; spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); atomic_dec(&inodes_stat.nr_inodes); return 1; } @@ -1505,17 +1455,12 @@ void iput(struct inode *inode) if (inode) { BUG_ON(inode->i_state == I_CLEAR); -retry1: +retry: spin_lock(&inode->i_lock); if (inode->i_count == 1) { - if (!spin_trylock(&inode_lock)) { -retry2: - spin_unlock(&inode->i_lock); - goto retry1; - } if (!spin_trylock(&sb_inode_list_lock)) { - spin_unlock(&inode_lock); - goto retry2; + spin_unlock(&inode->i_lock); + goto retry; } inode->i_count--; iput_final(inode); @@ -1713,10 +1658,8 @@ static void __wait_on_freeing_inode(stru wq = bit_waitqueue(&inode->i_state, __I_NEW); prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE); spin_unlock(&inode->i_lock); - spin_unlock(&inode_lock); schedule(); finish_wait(wq, &wait.wait); - spin_lock(&inode_lock); } static __initdata unsigned long ihash_entries; Index: linux-2.6/fs/notify/inotify/inotify.c =================================================================== --- linux-2.6.orig/fs/notify/inotify/inotify.c +++ linux-2.6/fs/notify/inotify/inotify.c @@ -390,13 +390,16 @@ void inotify_unmount_inodes(struct list_ struct inode *need_iput_tmp; struct list_head *watches; + spin_lock(&inode->i_lock); /* * We cannot __iget() an inode in state I_CLEAR, I_FREEING, * I_WILL_FREE, or I_NEW which is fine because by that point * the inode cannot have any associated watches. */ - if (inode->i_state & (I_CLEAR|I_FREEING|I_WILL_FREE|I_NEW)) + if (inode->i_state & (I_CLEAR|I_FREEING|I_WILL_FREE|I_NEW)) { + spin_unlock(&inode->i_lock); continue; + } /* * If i_count is zero, the inode cannot have any watches and @@ -404,18 +407,21 @@ void inotify_unmount_inodes(struct list_ * evict all inodes with zero i_count from icache which is * unnecessarily violent and may in fact be illegal to do. */ - if (!inode->i_count) + if (!inode->i_count) { + spin_unlock(&inode->i_lock); continue; + } need_iput_tmp = need_iput; need_iput = NULL; /* In case inotify_remove_watch_locked() drops a reference. */ if (inode != need_iput_tmp) { - spin_lock(&inode->i_lock); __iget(inode); - spin_unlock(&inode->i_lock); } else need_iput_tmp = NULL; + + spin_unlock(&inode->i_lock); + /* In case the dropping of a reference would nuke next_i. */ if (&next_i->i_sb_list != list) { spin_lock(&next_i->i_lock); @@ -435,7 +441,6 @@ void inotify_unmount_inodes(struct list_ * iprune_mutex keeps shrink_icache_memory() away. */ spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); if (need_iput_tmp) iput(need_iput_tmp); @@ -455,7 +460,6 @@ void inotify_unmount_inodes(struct list_ mutex_unlock(&inode->inotify_mutex); iput(inode); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); } } Index: linux-2.6/include/linux/writeback.h =================================================================== --- linux-2.6.orig/include/linux/writeback.h +++ linux-2.6/include/linux/writeback.h @@ -9,7 +9,6 @@ struct backing_dev_info; -extern spinlock_t inode_lock; extern spinlock_t sb_inode_list_lock; extern spinlock_t wb_inode_list_lock; extern spinlock_t inode_hash_lock; Index: linux-2.6/fs/quota/dquot.c =================================================================== --- linux-2.6.orig/fs/quota/dquot.c +++ linux-2.6/fs/quota/dquot.c @@ -883,7 +883,6 @@ static void add_dquot_ref(struct super_b int reserved = 0; #endif - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { spin_lock(&inode->i_lock); @@ -907,7 +906,6 @@ static void add_dquot_ref(struct super_b __iget(inode); spin_unlock(&inode->i_lock); spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); iput(old_inode); __dquot_initialize(inode, type); @@ -917,11 +915,9 @@ static void add_dquot_ref(struct super_b * reference and we cannot iput it under inode_lock. So we * keep the reference and iput it later. */ old_inode = inode; - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); } spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); iput(old_inode); #ifdef CONFIG_QUOTA_DEBUG @@ -999,7 +995,6 @@ static void remove_dquot_ref(struct supe { struct inode *inode; - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { /* @@ -1012,7 +1007,6 @@ static void remove_dquot_ref(struct supe remove_inode_dquot_ref(inode, type, tofree_head); } spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); } /* Gather all references from inodes and drop them */ Index: linux-2.6/fs/notify/inode_mark.c =================================================================== --- linux-2.6.orig/fs/notify/inode_mark.c +++ linux-2.6/fs/notify/inode_mark.c @@ -368,13 +368,16 @@ void fsnotify_unmount_inodes(struct list list_for_each_entry_safe(inode, next_i, list, i_sb_list) { struct inode *need_iput_tmp; + spin_lock(&inode->i_lock); /* * We cannot __iget() an inode in state I_CLEAR, I_FREEING, * I_WILL_FREE, or I_NEW which is fine because by that point * the inode cannot have any associated watches. */ - if (inode->i_state & (I_CLEAR|I_FREEING|I_WILL_FREE|I_NEW)) + if (inode->i_state & (I_CLEAR|I_FREEING|I_WILL_FREE|I_NEW)) { + spin_unlock(&inode->i_lock); continue; + } /* * If i_count is zero, the inode cannot have any watches and @@ -382,19 +385,20 @@ void fsnotify_unmount_inodes(struct list * evict all inodes with zero i_count from icache which is * unnecessarily violent and may in fact be illegal to do. */ - if (!inode->i_count) + if (!inode->i_count) { + spin_unlock(&inode->i_lock); continue; + } need_iput_tmp = need_iput; need_iput = NULL; /* In case fsnotify_inode_delete() drops a reference. */ if (inode != need_iput_tmp) { - spin_lock(&inode->i_lock); __iget(inode); - spin_unlock(&inode->i_lock); } else need_iput_tmp = NULL; + spin_unlock(&inode->i_lock); /* In case the dropping of a reference would nuke next_i. */ if (&next_i->i_sb_list != list) { @@ -415,7 +419,6 @@ void fsnotify_unmount_inodes(struct list * iprune_mutex keeps shrink_icache_memory() away. */ spin_unlock(&sb_inode_list_lock); - spin_unlock(&inode_lock); if (need_iput_tmp) iput(need_iput_tmp); @@ -427,7 +430,6 @@ void fsnotify_unmount_inodes(struct list iput(inode); - spin_lock(&inode_lock); spin_lock(&sb_inode_list_lock); } } Index: linux-2.6/mm/backing-dev.c =================================================================== --- linux-2.6.orig/mm/backing-dev.c +++ linux-2.6/mm/backing-dev.c @@ -77,7 +77,6 @@ static int bdi_debug_stats_show(struct s * RCU on the reader side */ nr_wb = nr_dirty = nr_io = nr_more_io = 0; - spin_lock(&inode_lock); spin_lock(&wb_inode_list_lock); list_for_each_entry(wb, &bdi->wb_list, list) { nr_wb++; @@ -89,7 +88,6 @@ static int bdi_debug_stats_show(struct s nr_more_io++; } spin_unlock(&wb_inode_list_lock); - spin_unlock(&inode_lock); get_dirty_limits(&background_thresh, &dirty_thresh, &bdi_thresh, bdi); @@ -713,13 +711,11 @@ void bdi_destroy(struct backing_dev_info if (bdi_has_dirty_io(bdi)) { struct bdi_writeback *dst = &default_backing_dev_info.wb; - spin_lock(&inode_lock); spin_lock(&wb_inode_list_lock); list_splice(&bdi->wb.b_dirty, &dst->b_dirty); list_splice(&bdi->wb.b_io, &dst->b_io); list_splice(&bdi->wb.b_more_io, &dst->b_more_io); spin_unlock(&wb_inode_list_lock); - spin_unlock(&inode_lock); } bdi_unregister(bdi); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/