Re: [PATCH rdma-core] irdma: Restore full memory barrier for doorbell optimization
From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2021-08-10 11:59:40
On Mon, Aug 09, 2021 at 08:07:32PM +0000, Nikolova, Tatyana E wrote:
1. Software writing the valid bit in the WQE. 2. Software reading shadow memory (hw_tail) value.
You are missing an ordered atomic on this read it looks like Jason