Commit 1f565de6 authored Feb 16, 2016 by Tahsin Erdogan Committed by Alex Shi Nov 29, 2016

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: d10c8095 ("writeback: implement foreign cgroup inode bdi_writeback switching")
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit 3d65ae4634ed8350aee98a4e6f4e41fe40c7d282)
Signed-off-by: Alex Shi <alex.shi@linaro.org>

parent aaaf9e59

fs/inode.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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);