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Date:   Thu, 18 Feb 2021 07:24:32 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Joao Martins <joao.m.martins@oracle.com>
Cc:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        linux-rdma@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        Doug Ledford <dledford@redhat.com>,
        John Hubbard <jhubbard@nvidia.com>,
        Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH v4 0/4] mm/gup: page unpining improvements
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On Fri, Feb 12, 2021 at 01:08:39PM +0000, Joao Martins wrote:
> Hey,
> 
> This series improves page unpinning, with an eye on improving MR
> deregistration for big swaths of memory (which is bound by the page
> unpining), particularly:

Can you also take a look at the (bdev and iomap) direct I/O code to
make use of this?  It should really help there, with a much wieder use
than RDMA.