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Subject: Re: [PATCH v2] xsk: share the mmap_sem for page pinning
To:     akpm@linux-foundation.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        "David S . Miller" <davem@davemloft.net>,
        Bjorn Topel <bjorn.topel@intel.com>,
        Magnus Karlsson <magnus.karlsson@intel.com>,
        netdev@vger.kernel.org, Davidlohr Bueso <dbueso@suse.de>
References: <20190207053740.26915-1-dave@stgolabs.net>
 <20190207053740.26915-2-dave@stgolabs.net>
 <20190211161529.uskq5ca7y3j5522i@linux-r8p5>
From:   Daniel Borkmann <daniel@iogearbox.net>
Message-ID: <ec544ae4-4671-de96-69c2-2f438f048a83@iogearbox.net>
Date:   Mon, 11 Feb 2019 20:53:37 +0100
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On 02/11/2019 05:15 PM, Davidlohr Bueso wrote:
> Holding mmap_sem exclusively for a gup() is an overkill.
> Lets share the lock and replace the gup call for gup_longterm(),
> as it is better suited for the lifetime of the pinning.
> 
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Bjorn Topel <bjorn.topel@intel.com>
> Cc: Magnus Karlsson <magnus.karlsson@intel.com>
> CC: netdev@vger.kernel.org
> Signed-off-by: Davidlohr Bueso <dbueso@suse.de>

Applied, thanks!