Re: [PATCH v3 1/4] fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()

[Dave Chinner]

On Tue, Sep 11, 2018 at 03:18:23PM -0400, Waiman Long wrote:
> The nr_dentry_unused per-cpu counter tracks dentries in both the
> LRU lists and the shrink lists where the DCACHE_LRU_LIST bit is set.
> The shrink_dcache_sb() function moves dentries from the LRU list to a
> shrink list and subtracts the dentry count from nr_dentry_unused. This
> is incorrect as the nr_dentry_unused count Will also be decremented in
> shrink_dentry_list() via d_shrink_del(). To fix this double decrement,
> the decrement in the shrink_dcache_sb() function is taken out.
> 
> Fixes: 4e717f5c1083 ("list_lru: remove special case function list_lru_dispose_all."
> 
> Signed-off-by: Waiman Long <longman@xxxxxxxxxx>

Please add a stable tag for this.

Otherwise looks fine.

Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>

-- 
Dave Chinner
david@xxxxxxxxxxxxx