writeback: initialize inode members that track writeback history

inode struct members that track cgroup writeback information should be reinitialized when inode gets allocated from kmem_cache. Otherwise, their values remain and get used by the new inode. Signed-off-by: Tahsin Erdogan <[email protected]> Acked-by: Tejun Heo <[email protected]> Fixes: d10c809 ("writeback: implement foreign cgroup inode bdi_writeback switching") Signed-off-by: Jens Axboe <[email protected]>
kyagi · Feb 16, 2016 · 3d65ae4 · 3d65ae4
1 parent 5ff8eaa
commit 3d65ae4
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/fs/inode.c b/fs/inode.c
@@ -154,6 +154,12 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
 	inode->i_rdev = 0;
 	inode->dirtied_when = 0;
 
+#ifdef CONFIG_CGROUP_WRITEBACK
+	inode->i_wb_frn_winner = 0;
+	inode->i_wb_frn_avg_time = 0;
+	inode->i_wb_frn_history = 0;
+#endif
+
 	if (security_inode_alloc(inode))
 		goto out;
 	spin_lock_init(&inode->i_lock);