Re: [PATCH v4 0/5] vfs: Use dlock list for SB's s_inodes list

[Christoph Lameter]

On Fri, 22 Jul 2016, Waiman Long wrote:

>  - Add a new patch to make the percpu head structure cacheline aligned
>    to prevent cacheline contention from disrupting the performance
>    of nearby percpu variables.

It would be better not to use the percpu allocation etc for this.
Given the frequency of off node data access I would say that the data
structure does not qualify as per cpu data. You have per cpu data items
yes but this is not used as per cpu data.