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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 <tahsin@google.com>
Acked-by: Tejun Heo <tj@kernel.org>
Fixes: d10c809552 ("writeback: implement foreign cgroup inode bdi_writeback switching")
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Tahsin Erdogan 2016-02-16 13:34:39 -08:00 committed by Jens Axboe
parent 5ff8eaac16
commit 3d65ae4634
1 changed files with 6 additions and 0 deletions
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6
fs/inode.c
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@ -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);