xen-devel.lists.xenproject.org archive mirror
 help / color / mirror / Atom feed
From: Jan Beulich <jbeulich@suse.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	George Dunlap <George.Dunlap@eu.citrix.com>,
	Ian Jackson <ian.jackson@citrix.com>,
	Julien Grall <julien@xen.org>, Wei Liu <wl@xen.org>,
	Stefano Stabellini <sstabellini@kernel.org>
Subject: [PATCH v2 0/2] common: XSA-327 follow-up
Date: Tue, 22 Dec 2020 09:13:42 +0100	[thread overview]
Message-ID: <2a08aa31-fdbf-89ee-cd49-813f818b709a@suse.com> (raw)

There are a few largely cosmetic things that were discussed in the
context of the XSA, but which weren't really XSA material.

1: common: map_vcpu_info() cosmetics
2: evtchn/fifo: don't enforce higher than necessary alignment

I realize both changes are controversial. For the first one
discussion was about the choice of error code. Neither EINVAL nor
EFAULT represent the fact that it is a choice of implementation
to not support mis-aligned structures. If ENXIO isn't liked, the
best I can suggest are EOPNOTSUPP or (as previously suggested)
EPERM. I think it ought to be possible to settle on an error
code everyone can live with.

For the second one the question was whether the relaxation is
useful to do. The original reason for wanting to make the change
remains: The original code here should not be used as an excuse
to introduce similar over-alignment requirements elsewhere. I
can live with the change getting rejected, but if so I'd like to
request that some alternative be submitted to ensure that the
immediate goal can still be reached.


             reply	other threads:[~2020-12-22  8:14 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-22  8:13 Jan Beulich [this message]
2020-12-22  8:14 ` [PATCH v2 1/2] common: map_vcpu_info() cosmetics Jan Beulich
2021-04-01 16:02   ` Julien Grall
2020-12-22  8:15 ` [PATCH v2 2/2] evtchn/fifo: don't enforce higher than necessary alignment Jan Beulich
2021-04-21 14:36 ` [PATCH v3] " Jan Beulich
2021-04-21 19:52   ` Julien Grall
2021-04-22  9:19     ` Jan Beulich
2021-04-29 11:55       ` Julien Grall

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=2a08aa31-fdbf-89ee-cd49-813f818b709a@suse.com \
    --to=jbeulich@suse.com \
    --cc=George.Dunlap@eu.citrix.com \
    --cc=andrew.cooper3@citrix.com \
    --cc=ian.jackson@citrix.com \
    --cc=julien@xen.org \
    --cc=sstabellini@kernel.org \
    --cc=wl@xen.org \
    --cc=xen-devel@lists.xenproject.org \
    --subject='Re: [PATCH v2 0/2] common: XSA-327 follow-up' \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).