4.2.8-ckt5 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Tahsin Erdogan <tahsin@xxxxxxxxxx>
commit 3d65ae4634ed8350aee98a4e6f4e41fe40c7d282 upstream.
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 <tahsin@xxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Fixes: d10c80955265 ("writeback: implement foreign cgroup inode bdi_writeback switching")
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
fs/inode.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/inode.c b/fs/inode.c
index d30640f..8d72fac 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -156,6 +156,12 @@ 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);
--
2.7.0
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