From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4D597C4332F for ; Mon, 14 Nov 2022 08:31:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=P0XkuxGx3lJga+kX42L+ETn0/svQU3mAzcs8ZRKMiKE=; b=Lkqbsgtl5iiJjG KhD1+3KhQzM4GdtvRFUSgGPcWDu11V2kfjoyuyzi+2BZDjjTgQlUK8QzY+eULI37CkvBV5BuAP6ky go9PtX6mKdT2Tr3zlqKtxaytah6rS7quHqyTnCZOP5kdGlcw7yTvrClfga4/JRyq+un1jHbWyfmFB JKi8iNUBSwQqpe8LjqkvdqrJ6CaJM1NsFFKaFgu72lf3Z4VP4L9hOTtNtfCLg/TZc9Ql+umW1WFSn mqZrFYUfdhPYxYM+ez4nSf4IJRdvH9ptZwK5cZ4Qa6OiXc0ffQBQJ4lg+TY2l+fdICwQ5xvRhIXQX Bgofe7UqEFnOyeOB9I3A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ouUrD-00Gojp-VZ; Mon, 14 Nov 2022 08:30:20 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ouUrB-00GoiE-65 for linux-arm-kernel@lists.infradead.org; Mon, 14 Nov 2022 08:30:18 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AD71D60F0E; Mon, 14 Nov 2022 08:30:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC080C433C1; Mon, 14 Nov 2022 08:30:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668414615; bh=M5Go57T18KU3kovwfaSoPQkXTIJ9pU/x8zoi9VefwW4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SdH1QQKcLZQv3AKSNRqZgc4tXzBdMXgXKDuK3MoPQQRFpIYn6+O1nQZvg7Lp1GOYn QE742J9xLRn5ra6lGaVDnYoZgTzRjS0XJQSharaM9uVu6TJ//f4uH4suR3r5UAk5PK EjsXAoDr8CJU0bttAruYJ+pnYM1kFvmZR3cBw8CkWNisnUsoXW1ZUF1QcRRiDm7Y3L oMXJbnHupIRPsjq+jbJhGZzXY9uFf9StdS9G4A+jFvbnURqB8ZwRSbqvO+FUa98HIw VRhvftCN3zogKZ7mhH3RYpIiQTD/5vXd1uPM6Tw59jiLpnVXiTCkuHHIHG2JgSWt2/ SIDKXJb6O8rcQ== Date: Mon, 14 Nov 2022 10:30:11 +0200 From: Leon Romanovsky To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, linux-kselftest@vger.kernel.org, Linus Torvalds , Andrew Morton , Jason Gunthorpe , John Hubbard , Peter Xu , Greg Kroah-Hartman , Andrea Arcangeli , Hugh Dickins , Nadav Amit , Vlastimil Babka , Matthew Wilcox , Mike Kravetz , Muchun Song , Lucas Stach , David Airlie , Oded Gabbay , Arnd Bergmann Subject: Re: [PATCH RFC 10/19] RDMA/umem: remove FOLL_FORCE usage Message-ID: References: <20221107161740.144456-1-david@redhat.com> <20221107161740.144456-11-david@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221107161740.144456-11-david@redhat.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221114_003017_297425_BACA4CB2 X-CRM114-Status: GOOD ( 14.40 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Nov 07, 2022 at 05:17:31PM +0100, David Hildenbrand wrote: > GUP now supports reliable R/O long-term pinning in COW mappings, such > that we break COW early. MAP_SHARED VMAs only use the shared zeropage so > far in one corner case (DAXFS file with holes), which can be ignored > because GUP does not support long-term pinning in fsdax (see > check_vma_flags()). > > Consequently, FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM is no longer required > for reliable R/O long-term pinning: FOLL_LONGTERM is sufficient. So stop > using FOLL_FORCE, which is really only for debugger access. > > Cc: Jason Gunthorpe > Cc: Leon Romanovsky > Signed-off-by: David Hildenbrand > --- > drivers/infiniband/core/umem.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) Thanks, Tested-by: Leon Romanovsky # Over mlx4 and mlx5. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel