From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46986) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZJjPp-00032n-WF for qemu-devel@nongnu.org; Mon, 27 Jul 2015 10:30:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZJjPk-0008NN-Sm for qemu-devel@nongnu.org; Mon, 27 Jul 2015 10:30:05 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44501) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZJjPk-0008NC-Na for qemu-devel@nongnu.org; Mon, 27 Jul 2015 10:30:00 -0400 Date: Mon, 27 Jul 2015 19:59:47 +0530 From: Amit Shah Message-ID: <20150727142947.GG12267@grmbl.mre> References: <1434450415-11339-1-git-send-email-dgilbert@redhat.com> <1434450415-11339-38-git-send-email-dgilbert@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1434450415-11339-38-git-send-email-dgilbert@redhat.com> Subject: Re: [Qemu-devel] [PATCH v7 37/42] Postcopy; Handle userfault requests List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert (git)" Cc: aarcange@redhat.com, yamahata@private.email.ne.jp, quintela@redhat.com, liang.z.li@intel.com, qemu-devel@nongnu.org, luis@cs.umu.se, pbonzini@redhat.com, david@gibson.dropbear.id.au On (Tue) 16 Jun 2015 [11:26:50], Dr. David Alan Gilbert (git) wrote: > From: "Dr. David Alan Gilbert" > > userfaultfd is a Linux syscall that gives an fd that receives a stream > of notifications of accesses to pages registered with it and allows > the program to acknowledge those stalls and tell the accessing > thread to carry on. > > We convert the requests from the kernel into messages back to the > source asking for the pages. > > Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Amit Shah Amit