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-rw-r--r--fs/inode.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/inode.c b/fs/inode.c
index f09148e07198..78a17b8859e1 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -575,6 +575,7 @@ static void dispose_list(struct list_head *head)
list_del_init(&inode->i_lru);
evict(inode);
+ cond_resched();
}
}
@@ -592,6 +593,7 @@ void evict_inodes(struct super_block *sb)
struct inode *inode, *next;
LIST_HEAD(dispose);
+again:
spin_lock(&sb->s_inode_list_lock);
list_for_each_entry_safe(inode, next, &sb->s_inodes, i_sb_list) {
if (atomic_read(&inode->i_count))
@@ -607,6 +609,18 @@ void evict_inodes(struct super_block *sb)
inode_lru_list_del(inode);
spin_unlock(&inode->i_lock);
list_add(&inode->i_lru, &dispose);
+
+ /*
+ * We can have a ton of inodes to evict at unmount time given
+ * enough memory, check to see if we need to go to sleep for a
+ * bit so we don't livelock.
+ */
+ if (need_resched()) {
+ spin_unlock(&sb->s_inode_list_lock);
+ cond_resched();
+ dispose_list(&dispose);
+ goto again;
+ }
}
spin_unlock(&sb->s_inode_list_lock);

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