From: Oliver Upton <oliver.upton@linux.dev>
To: Quentin Perret <qperret@google.com>
Cc: kvm@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
Will Deacon <will@kernel.org>,
kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/2] KVM: arm64: Redefine pKVM memory transitions in terms of source/target
Date: Fri, 28 Oct 2022 10:23:36 +0000 [thread overview]
Message-ID: <Y1utqG5f0lRrNwlI@google.com> (raw)
In-Reply-To: <Y1uncNq2oyc5wALG@google.com>
Quentin,
On Fri, Oct 28, 2022 at 09:57:04AM +0000, Quentin Perret wrote:
> Hey Oliver,
>
> On Friday 28 Oct 2022 at 08:34:48 (+0000), Oliver Upton wrote:
> > Perhaps it is just me, but the 'initiator' and 'completer' terms are
> > slightly confusing descriptors for the addresses involved in a memory
> > transition. Apply a rename to instead describe memory transitions in
> > terms of a source and target address.
>
> Just to provide some rationale for the initiator/completer terminology,
> the very first implementation we did of this used 'sender/recipient (or
> something along those lines I think), and we ended up confusing
> ourselves massively. The main issue is that memory doesn't necessarily
> 'flow' in the same direction as the transition. It's all fine for a
> donation or a share, but reclaim and unshare become funny. 'The
> recipient of an unshare' can be easily misunderstood, I think.
>
> So yeah, we ended up with initiator/completer, which may not be the
> prettiest terminology, but it was useful to disambiguate things at
> least.
I see, thanks for the background :) If I've managed to re-ambiguate the
language here then LMK. Frankly, I'm more strongly motivated on the
first patch anyway.
--
Thanks,
Oliver
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Oliver Upton <oliver.upton@linux.dev>
To: Quentin Perret <qperret@google.com>
Cc: Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
kvmarm@lists.linux.dev, Will Deacon <will@kernel.org>,
Fuad Tabba <tabba@google.com>,
Vincent Donnefort <vdonnefort@google.com>
Subject: Re: [PATCH 2/2] KVM: arm64: Redefine pKVM memory transitions in terms of source/target
Date: Fri, 28 Oct 2022 10:23:36 +0000 [thread overview]
Message-ID: <Y1utqG5f0lRrNwlI@google.com> (raw)
Message-ID: <20221028102336.0HQuFVwn6iStmptKPOoSFyrGYFzuIrqof3dEDMb4bzs@z> (raw)
In-Reply-To: <Y1uncNq2oyc5wALG@google.com>
Quentin,
On Fri, Oct 28, 2022 at 09:57:04AM +0000, Quentin Perret wrote:
> Hey Oliver,
>
> On Friday 28 Oct 2022 at 08:34:48 (+0000), Oliver Upton wrote:
> > Perhaps it is just me, but the 'initiator' and 'completer' terms are
> > slightly confusing descriptors for the addresses involved in a memory
> > transition. Apply a rename to instead describe memory transitions in
> > terms of a source and target address.
>
> Just to provide some rationale for the initiator/completer terminology,
> the very first implementation we did of this used 'sender/recipient (or
> something along those lines I think), and we ended up confusing
> ourselves massively. The main issue is that memory doesn't necessarily
> 'flow' in the same direction as the transition. It's all fine for a
> donation or a share, but reclaim and unshare become funny. 'The
> recipient of an unshare' can be easily misunderstood, I think.
>
> So yeah, we ended up with initiator/completer, which may not be the
> prettiest terminology, but it was useful to disambiguate things at
> least.
I see, thanks for the background :) If I've managed to re-ambiguate the
language here then LMK. Frankly, I'm more strongly motivated on the
first patch anyway.
--
Thanks,
Oliver
WARNING: multiple messages have this Message-ID (diff)
From: Oliver Upton <oliver.upton@linux.dev>
To: Quentin Perret <qperret@google.com>
Cc: Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
kvmarm@lists.linux.dev, Will Deacon <will@kernel.org>,
Fuad Tabba <tabba@google.com>,
Vincent Donnefort <vdonnefort@google.com>
Subject: Re: [PATCH 2/2] KVM: arm64: Redefine pKVM memory transitions in terms of source/target
Date: Fri, 28 Oct 2022 10:23:36 +0000 [thread overview]
Message-ID: <Y1utqG5f0lRrNwlI@google.com> (raw)
In-Reply-To: <Y1uncNq2oyc5wALG@google.com>
Quentin,
On Fri, Oct 28, 2022 at 09:57:04AM +0000, Quentin Perret wrote:
> Hey Oliver,
>
> On Friday 28 Oct 2022 at 08:34:48 (+0000), Oliver Upton wrote:
> > Perhaps it is just me, but the 'initiator' and 'completer' terms are
> > slightly confusing descriptors for the addresses involved in a memory
> > transition. Apply a rename to instead describe memory transitions in
> > terms of a source and target address.
>
> Just to provide some rationale for the initiator/completer terminology,
> the very first implementation we did of this used 'sender/recipient (or
> something along those lines I think), and we ended up confusing
> ourselves massively. The main issue is that memory doesn't necessarily
> 'flow' in the same direction as the transition. It's all fine for a
> donation or a share, but reclaim and unshare become funny. 'The
> recipient of an unshare' can be easily misunderstood, I think.
>
> So yeah, we ended up with initiator/completer, which may not be the
> prettiest terminology, but it was useful to disambiguate things at
> least.
I see, thanks for the background :) If I've managed to re-ambiguate the
language here then LMK. Frankly, I'm more strongly motivated on the
first patch anyway.
--
Thanks,
Oliver
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-10-28 10:23 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-28 8:34 [PATCH 0/2] KVM: arm64: pKVM memory transitions cleanup Oliver Upton
2022-10-28 8:34 ` Oliver Upton
2022-10-28 8:34 ` Oliver Upton
2022-10-28 8:34 ` [PATCH 1/2] KVM: arm64: Clean out the odd handling of completer_addr Oliver Upton
2022-10-28 8:34 ` Oliver Upton
2022-10-28 8:34 ` Oliver Upton
2022-11-10 10:42 ` Will Deacon
2022-11-10 10:42 ` Will Deacon
2022-11-10 10:42 ` Will Deacon
2022-10-28 8:34 ` [PATCH 2/2] KVM: arm64: Redefine pKVM memory transitions in terms of source/target Oliver Upton
2022-10-28 8:34 ` Oliver Upton
2022-10-28 8:34 ` Oliver Upton
2022-10-28 9:57 ` Quentin Perret
2022-10-28 9:57 ` Quentin Perret
2022-10-28 9:57 ` Quentin Perret
2022-10-28 10:23 ` Oliver Upton [this message]
2022-10-28 10:23 ` Oliver Upton
2022-10-28 10:23 ` Oliver Upton
2022-11-10 10:46 ` Will Deacon
2022-11-10 10:46 ` Will Deacon
2022-11-10 10:46 ` Will Deacon
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:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Y1utqG5f0lRrNwlI@google.com \
--to=oliver.upton@linux.dev \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=maz@kernel.org \
--cc=qperret@google.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.