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Message-ID: <2cbe4b0dec12498e1243ef86519e1cf4a69a8b6c.camel@kernel.org>
Subject: Re: [PATCH v2 0/4] Eliminate the RQ_SPLICE_OK flag
From: Jeff Layton <jlayton@kernel.org>
To: Chuck Lever <cel@kernel.org>, linux-nfs@vger.kernel.org
Date: Mon, 27 Nov 2023 15:21:57 -0500
In-Reply-To: <170025895725.4577.18051288602708688381.stgit@bazille.1015granger.net>
References: 
	<170025895725.4577.18051288602708688381.stgit@bazille.1015granger.net>
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On Fri, 2023-11-17 at 17:14 -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
> Changes since v1:
> - Address "undefined reference to `svcauth_gss_flavor'"
>=20
> ---
>=20
> Chuck Lever (4):
>       SUNRPC: Add a server-side API for retrieving an RPC's pseudoflavor
>       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                     | 26 +++++++++++++++++++++++++-
>  fs/nfsd/vfs.h                     |  1 +
>  fs/nfsd/xdr4.h                    |  1 +
>  include/linux/sunrpc/svc.h        |  2 --
>  include/linux/sunrpc/svcauth.h    |  7 ++++++-
>  include/trace/events/sunrpc.h     |  1 -
>  net/sunrpc/auth_gss/svcauth_gss.c | 16 ++++++----------
>  net/sunrpc/svc.c                  |  2 --
>  net/sunrpc/svcauth.c              | 16 ++++++++++++++++
>  11 files changed, 68 insertions(+), 24 deletions(-)
>=20
> --
> Chuck Lever
>=20

Reviewed-by: Jeff Layton <jlayton@kernel.org>