| From | Kamal Mostafa <> | Subject | [PATCH 4.2.y-ckt 265/273] writeback: initialize inode members that track writeback history | Date | Mon, 7 Mar 2016 14:50:56 -0800 |
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4.2.8-ckt5 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Tahsin Erdogan <tahsin@google.com>
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@google.com> Acked-by: Tejun Heo <tj@kernel.org> Fixes: d10c80955265 ("writeback: implement foreign cgroup inode bdi_writeback switching") Signed-off-by: Jens Axboe <axboe@fb.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- 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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