linux-kernel - Re: [PATCH v2 2/2] IB/umem: use get_user_pages

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Date:   Mon, 9 Dec 2019 20:25:47 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     John Hubbard <jhubbard@...dia.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Christoph Hellwig <hch@...radead.org>,
        Ira Weiny <ira.weiny@...el.com>, linux-rdma@...r.kernel.org,
        linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>, Jan Kara <jack@...e.cz>,
        Jason Gunthorpe <jgg@...lanox.com>
Subject: Re: [PATCH v2 2/2] IB/umem: use get_user_pages_fast() to pin DMA
 pages

On Wed, Dec 04, 2019 at 01:36:03PM -0800, John Hubbard wrote:
> And get rid of the mmap_sem calls, as part of that. Note
> that get_user_pages_fast() will, if necessary, fall back to
> __gup_longterm_unlocked(), which takes the mmap_sem as needed.
>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Reviewed-by: Jan Kara <jack@...e.cz>
> Reviewed-by: Jason Gunthorpe <jgg@...lanox.com>
> Reviewed-by: Ira Weiny <ira.weiny@...el.com>
> Signed-off-by: John Hubbard <jhubbard@...dia.com>
> ---
>  drivers/infiniband/core/umem.c | 17 ++++++-----------
>  1 file changed, 6 insertions(+), 11 deletions(-)
>

Thanks,
Reviewed-by: Leon Romanovsky <leonro@...lanox.com>