From: Ian Jackson <Ian.Jackson@eu.citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Wei Liu <wei.liu2@citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
StefanoStabellini <stefano.stabellini@eu.citrix.com>,
mpohlack@amazon.de, ross.lagerwall@citrix.com,
Julien Grall <julien.grall@arm.com>,
Stefano Stabellini <stefano.stabellini@citrix.com>,
xen-devel@lists.xenproject.org,
Daniel De Graaf <dgdegra@tycho.nsa.gov>,
KeirFraser <keir@xen.org>,
sasha.levin@oracle.com
Subject: Re: REST MAINTAINERS feedback requested Was:Re: [PATCH v5 01/28] HYPERCALL_version_op. New hypercall mirroring XENVER_ but sane.
Date: Mon, 11 Apr 2016 17:25:04 +0100 [thread overview]
Message-ID: <22283.53216.174942.981878@mariner.uk.xensource.com> (raw)
In-Reply-To: <570BD56602000078000E63B6@prv-mh.provo.novell.com>
Jan Beulich writes ("Re: REST MAINTAINERS feedback requested Was:Re: [Xen-devel] [PATCH v5 01/28] HYPERCALL_version_op. New hypercall mirroring XENVER_ but sane."):
> On 11.04.16 at 16:22, <Ian.Jackson@eu.citrix.com> wrote:
> > But to an extent some of this conversation seems to be on matters of
> > taste.
>
> Agreed.
>
> > Jan, what is the downside of introducing a new hypercall ?
>
> Duplicate code effectively doing the same thing.
I agree that duplication is bad, all other things being equal.
But any improvement from an old API to a new one necessarily involves
providing a dual facility during a transition period.
I don't see an explicit deprecation in the patch that is in tree, but
it seems to me to be intended (and, perhaps, implied). Certainly if
we are going to permit these strings etc. to be bigger than fits in
the old hypercall, the old hypercall needs to be deprecated on the
grounds that it can provide incomplete or inaccurate information.
Does this way of looking at it help ?
Thanks,
Ian.
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next prev parent reply other threads:[~2016-04-11 16:34 UTC|newest]
Thread overview: 190+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-24 20:00 [PATCH v5] xSplice v1 design and implementation Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 01/28] HYPERCALL_version_op. New hypercall mirroring XENVER_ but sane Konrad Rzeszutek Wilk
2016-03-24 20:22 ` Andrew Cooper
2016-03-24 21:07 ` Konrad Rzeszutek Wilk
2016-03-24 21:30 ` Konrad Rzeszutek Wilk
2016-03-30 15:43 ` Jan Beulich
2016-03-31 6:30 ` Jan Beulich
2016-03-31 11:43 ` Konrad Rzeszutek Wilk
2016-03-31 12:07 ` Jan Beulich
2016-03-31 13:28 ` REST MAINTAINERS feedback requested Was:Re: " Konrad Rzeszutek Wilk
2016-03-31 13:50 ` Jan Beulich
2016-04-08 16:33 ` Jan Beulich
2016-04-08 17:09 ` Konrad Rzeszutek Wilk
2016-04-08 17:13 ` Jan Beulich
2016-04-08 17:21 ` Wei Liu
2016-04-08 17:23 ` Konrad Rzeszutek Wilk
2016-04-08 17:27 ` Wei Liu
2016-04-08 17:21 ` Ian Jackson
2016-04-08 17:41 ` Andrew Cooper
2016-04-08 17:54 ` Jan Beulich
2016-04-11 10:50 ` Ian Jackson
2016-04-11 13:56 ` Konrad Rzeszutek Wilk
2016-04-11 14:22 ` Ian Jackson
2016-04-11 15:48 ` Jan Beulich
2016-04-11 16:25 ` Ian Jackson [this message]
2016-04-11 16:53 ` Konrad Rzeszutek Wilk
2016-04-11 17:06 ` Jan Beulich
2016-04-11 17:00 ` Jan Beulich
2016-04-11 17:13 ` Ian Jackson
2016-04-11 17:34 ` Jan Beulich
2016-04-11 17:46 ` Jan Beulich
2016-04-12 9:58 ` George Dunlap
2016-04-12 13:56 ` Konrad Rzeszutek Wilk
2016-04-12 14:38 ` George Dunlap
2016-04-12 15:00 ` Konrad Rzeszutek Wilk
2016-04-12 15:26 ` Ian Jackson
2016-04-13 4:21 ` Jan Beulich
2016-04-13 16:07 ` Ian Jackson
2016-04-14 15:13 ` George Dunlap
2016-04-14 15:59 ` Jan Beulich
2016-04-14 16:19 ` George Dunlap
2016-04-14 17:01 ` Jan Beulich
2016-04-14 18:11 ` REST MAINTAINERS feedback requested Was:Re: [PATCH v5 01/28] HYPERCALL_version_op. New hypercall mirroring XENVER_ but sane. [and 1 more messages] Ian Jackson
2016-04-14 19:22 ` Konrad Rzeszutek Wilk
2016-04-17 7:23 ` Jan Beulich
2016-04-15 11:23 ` REST MAINTAINERS feedback requested Was:Re: [PATCH v5 01/28] HYPERCALL_version_op. New hypercall mirroring XENVER_ but sane George Dunlap
2016-04-17 7:52 ` Jan Beulich
2016-04-12 15:31 ` Jan Beulich
2016-04-12 15:17 ` Jan Beulich
2016-04-12 15:28 ` Konrad Rzeszutek Wilk
2016-04-08 17:24 ` George Dunlap
2016-04-08 17:34 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 02/28] libxc/libxl/python/xenstat/ocaml: Use new XEN_VERSION hypercall Konrad Rzeszutek Wilk
2016-03-24 21:24 ` Wei Liu
2016-03-25 13:21 ` Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 03/28] arm/x86: Use struct virtual_region to do bug, symbol, and (x86) exception tables lookup Konrad Rzeszutek Wilk
2016-03-30 16:09 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 04/28] vmap: Add vmalloc_cb and vfree_cb Konrad Rzeszutek Wilk
2016-03-30 16:24 ` Jan Beulich
2016-03-30 16:44 ` Konrad Rzeszutek Wilk
2016-03-31 6:46 ` Jan Beulich
2016-03-31 11:49 ` Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 05/28] xsplice: Design document Konrad Rzeszutek Wilk
2016-03-29 9:36 ` Jan Beulich
2016-03-29 20:46 ` Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 06/28] xen/xsplice: Hypervisor implementation of XEN_XSPLICE_op Konrad Rzeszutek Wilk
2016-03-31 9:45 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 07/28] libxc: Implementation of XEN_XSPLICE_op in libxc Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 08/28] xen-xsplice: Tool to manipulate xsplice payloads Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 09/28] xsplice: Add helper elf routines Konrad Rzeszutek Wilk
2016-03-31 12:03 ` Jan Beulich
2016-04-06 1:38 ` Konrad Rzeszutek Wilk
2016-04-07 0:38 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 10/28] xsplice: Implement payload loading Konrad Rzeszutek Wilk
2016-03-31 13:45 ` Jan Beulich
2016-03-31 21:26 ` Konrad Rzeszutek Wilk
2016-04-01 9:18 ` Jan Beulich
2016-04-04 19:44 ` Konrad Rzeszutek Wilk
2016-04-05 1:57 ` Konrad Rzeszutek Wilk
2016-04-05 7:34 ` Jan Beulich
2016-04-05 15:50 ` Konrad Rzeszutek Wilk
2016-04-05 16:15 ` Jan Beulich
2016-04-05 16:45 ` Konrad Rzeszutek Wilk
2016-04-05 17:48 ` Konrad Rzeszutek Wilk
2016-04-07 0:49 ` Jan Beulich
2016-04-07 0:46 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 11/28] xsplice: Implement support for applying/reverting/replacing patches Konrad Rzeszutek Wilk
2016-04-01 13:28 ` Jan Beulich
2016-04-01 21:04 ` Konrad Rzeszutek Wilk
2016-04-04 7:07 ` Jan Beulich
2016-04-07 3:05 ` Konrad Rzeszutek Wilk
2016-04-07 15:38 ` Jan Beulich
2016-04-09 14:42 ` Konrad Rzeszutek Wilk
2016-04-11 15:38 ` Jan Beulich
2016-04-07 3:09 ` Konrad Rzeszutek Wilk
2016-04-07 15:43 ` Jan Beulich
2016-04-10 2:36 ` Konrad Rzeszutek Wilk
2016-04-10 2:45 ` Konrad Rzeszutek Wilk
2016-04-11 15:41 ` Jan Beulich
2016-04-11 23:29 ` Konrad Rzeszutek Wilk
2016-04-10 19:47 ` Is: ARM maintainers advice ..Was:Re: " Konrad Rzeszutek Wilk
2016-04-10 20:58 ` Stefano Stabellini
2016-04-11 15:44 ` Jan Beulich
2016-04-11 15:50 ` Konrad Rzeszutek Wilk
2016-04-11 16:05 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 12/28] x86/xen_hello_world.xsplice: Test payload for patching 'xen_extra_version' Konrad Rzeszutek Wilk
2016-04-01 13:33 ` Jan Beulich
2016-04-06 2:03 ` Konrad Rzeszutek Wilk
2016-04-07 1:03 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 13/28] xsplice, symbols: Implement symbol name resolution on address Konrad Rzeszutek Wilk
2016-04-01 15:11 ` Jan Beulich
2016-04-07 3:14 ` Konrad Rzeszutek Wilk
2016-04-07 15:46 ` Jan Beulich
2016-04-08 1:32 ` Konrad Rzeszutek Wilk
2016-04-08 15:21 ` Jan Beulich
2016-04-08 15:27 ` Konrad Rzeszutek Wilk
2016-04-08 15:29 ` Jan Beulich
[not found] ` <5707D68A.8090006@citrix.com>
[not found] ` <5707FA8B02000078000E6178@prv-mh.provo.novell.com>
2016-04-11 8:07 ` Ross Lagerwall
2016-03-24 20:00 ` [PATCH v5 14/28] x86, xsplice: Print payload's symbol name and payload name in backtraces Konrad Rzeszutek Wilk
2016-04-01 15:23 ` Jan Beulich
2016-04-06 2:39 ` Konrad Rzeszutek Wilk
2016-04-07 1:07 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 15/28] xsplice: Add .xsplice.hooks functions and test-case Konrad Rzeszutek Wilk
2016-04-01 15:50 ` Jan Beulich
2016-04-06 2:42 ` Konrad Rzeszutek Wilk
2016-04-06 6:39 ` Martin Pohlack
2016-04-07 1:15 ` Jan Beulich
2016-04-08 15:57 ` Ross Lagerwall
2016-04-08 17:39 ` Jan Beulich
2016-04-11 8:23 ` Ross Lagerwall
2016-04-22 13:33 ` Jan Beulich
2016-04-22 13:58 ` Jan Beulich
2016-04-22 17:32 ` Konrad Rzeszutek Wilk
2016-04-07 1:11 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 16/28] xsplice: Add support for bug frames Konrad Rzeszutek Wilk
2016-04-01 16:00 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 17/28] xsplice: Add support for exception tables Konrad Rzeszutek Wilk
2016-04-01 16:06 ` Jan Beulich
2016-04-06 14:41 ` Konrad Rzeszutek Wilk
2016-04-06 15:32 ` Andrew Cooper
2016-04-07 1:21 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 18/28] xsplice: Add support for alternatives Konrad Rzeszutek Wilk
2016-04-01 16:20 ` Jan Beulich
2016-04-07 3:11 ` Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 19/28] build_id: Provide ld-embedded build-ids Konrad Rzeszutek Wilk
2016-04-04 12:46 ` Jan Beulich
2016-04-07 2:58 ` Konrad Rzeszutek Wilk
2016-04-08 15:49 ` Ross Lagerwall
2016-04-08 18:47 ` Konrad Rzeszutek Wilk
2016-04-08 18:54 ` Andrew Cooper
2016-04-08 19:54 ` Jan Beulich
2016-04-08 0:18 ` Konrad Rzeszutek Wilk
2016-04-08 1:52 ` Konrad Rzeszutek Wilk
2016-04-08 15:27 ` Jan Beulich
2016-04-08 17:06 ` Konrad Rzeszutek Wilk
2016-04-08 17:44 ` Jan Beulich
2016-04-08 19:23 ` Konrad Rzeszutek Wilk
2016-04-08 19:39 ` Konrad Rzeszutek Wilk
2016-04-08 20:14 ` Jan Beulich
2016-04-08 20:50 ` Konrad Rzeszutek Wilk
2016-04-08 21:11 ` Jan Beulich
2016-04-08 21:15 ` Konrad Rzeszutek Wilk
2016-04-08 15:25 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 20/28] HYPERCALL_version_op: Add VERSION_build_id to retrieve build-id Konrad Rzeszutek Wilk
2016-03-25 16:26 ` Daniel De Graaf
2016-04-04 13:35 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 21/28] libxl: info: Display build_id of the hypervisor using XEN_VERSION_build_id Konrad Rzeszutek Wilk
2016-03-25 13:25 ` Konrad Rzeszutek Wilk
2016-03-25 15:27 ` Wei Liu
2016-03-24 20:00 ` [PATCH v5 22/28] xsplice: Print build_id in keyhandler and on bootup Konrad Rzeszutek Wilk
2016-04-04 13:38 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 23/28] xsplice: Stacking build-id dependency checking Konrad Rzeszutek Wilk
2016-04-04 15:00 ` Jan Beulich
2016-04-04 20:01 ` Konrad Rzeszutek Wilk
2016-04-05 7:43 ` Jan Beulich
2016-04-08 16:15 ` Ross Lagerwall
2016-04-08 17:47 ` Jan Beulich
2016-04-06 20:05 ` Konrad Rzeszutek Wilk
2016-04-07 1:24 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 24/28] xsplice/xen_replace_world: Test-case for XSPLICE_ACTION_REPLACE Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 25/28] xsplice: Print dependency and payloads build_id in the keyhandler Konrad Rzeszutek Wilk
2016-04-04 15:03 ` Jan Beulich
2016-03-24 20:00 ` [PATCH v5 26/28] xsplice: Prevent duplicate payloads from being loaded Konrad Rzeszutek Wilk
2016-04-04 15:06 ` Jan Beulich
2016-04-04 19:52 ` Konrad Rzeszutek Wilk
2016-03-24 20:00 ` [PATCH v5 27/28] xsplice: Add support for shadow variables Konrad Rzeszutek Wilk
2016-04-04 15:18 ` Jan Beulich
2016-04-06 2:26 ` Konrad Rzeszutek Wilk
2016-04-08 15:58 ` Ross Lagerwall
2016-03-24 20:00 ` [PATCH v5 28/28] MAINTAINERS/xsplice: Add myself and Ross as the maintainers Konrad Rzeszutek Wilk
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