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[2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id k38-20020a63ff26000000b005b56de1fd82si9228445pgi.272.2023.11.27.04.38.58 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Nov 2023 04:38:58 -0800 (PST) Received-SPF: pass (google.com: domain of linux-nfs+bounces-83-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=W1FvDMSj; spf=pass (google.com: domain of linux-nfs+bounces-83-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-nfs+bounces-83-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id B876B281595 for ; Mon, 27 Nov 2023 12:38:57 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 67FB62D7AE; Mon, 27 Nov 2023 12:38:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W1FvDMSj" X-Original-To: linux-nfs@vger.kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4AEF12D7AA for ; Mon, 27 Nov 2023 12:38:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0885C433C8; Mon, 27 Nov 2023 12:38:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1701088737; bh=72dy0Gd2fvQwIKbEQa/aSldG/bYdezyyc0LW8X7Qzao=; h=Subject:From:To:Date:In-Reply-To:References:From; b=W1FvDMSj99lKIthYOYWDD7gESVFuSLR3I58jqeo0DphpmzHmrWlU65DVmUQD5ct2o vqkK7z8g1mg6CzhPenECzoY83/2XKspn86xNfBna7udQJM9zI+4ITorC5/0/BQwzt/ io2LOifB9jWyr5hI6M7+GFeLTmt4/5dn/3WVCEZzhZQR5mwOpur+ocxRvUEj3YufZp 7JILkiiifZ/MCL098ZnZYdqSKzfqhYpqoXPUNYHcvPoCEpxcr6gL8ESwMC256+oAa+ XeRXL5AuJy19R5a1KkTD0VBqWd1qX6DF0nEzRBN65B8Kc9U51zjW9d/1R++BlFsUZY TKX6cA/L/AEGA== Message-ID: Subject: Re: [PATCH v1 0/3] Eliminate the RQ_SPLICE_OK flag From: Jeff Layton To: Chuck Lever , linux-nfs@vger.kernel.org Date: Mon, 27 Nov 2023 07:38:55 -0500 In-Reply-To: <169988319025.6844.14300255016413760826.stgit@bazille.1015granger.net> References: <169988319025.6844.14300255016413760826.stgit@bazille.1015granger.net> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; 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 kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.1 (3.50.1-1.fc39) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2023-11-13 at 08:54 -0500, Chuck Lever wrote: > The server's splice read path is used by the majority of exported > filesystems. At last month's bake-a-thon, we tossed around some > ideas about how to improve benchmarking and test coverage of the NFS > server's vectored-read path, which is a fallback. >=20 > One way to do this would be to expose a switch that can be set by > test harnesses to disable splice reads. >=20 > As an initial step, hoist RQ_SPLICE_OK out of the RPC layer. Later, > I'll add a netlink command to as a switch between "use splice if > possible" and "always use vectored reads". (I don't want to collide > with the work Lorenzo is doing). >=20 > --- >=20 > Chuck Lever (3): > NFSD: Replace RQ_SPLICE_OK in nfsd_read() > NFSD: Modify NFSv4 to use nfsd_read_splice_ok() > SUNRPC: Remove RQ_SPLICE_OK >=20 >=20 > fs/nfsd/nfs4proc.c | 7 +++++-- > fs/nfsd/nfs4xdr.c | 13 ++++++++----- > fs/nfsd/vfs.c | 30 +++++++++++++++++++++++++++++- > fs/nfsd/vfs.h | 1 + > fs/nfsd/xdr4.h | 1 + > include/linux/sunrpc/svc.h | 2 -- > include/trace/events/sunrpc.h | 1 - > net/sunrpc/auth_gss/svcauth_gss.c | 10 ---------- > net/sunrpc/svc.c | 2 -- > 9 files changed, 44 insertions(+), 23 deletions(-) >=20 > -- > Chuck Lever >=20 Nice cleanup Reviewed-by: Jeff Layton