From: Michael Rolnik <mrolnik@gmail.com>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>
Subject: Re: of AVR target page size
Date: Wed, 17 Mar 2021 23:32:36 +0200 [thread overview]
Message-ID: <CAK4993j08YrWb4CFZ_rgiCdGQDcc7fCcL4O3VT9Zz3mGL=9+2Q@mail.gmail.com> (raw)
In-Reply-To: <YFJjIq45ggSZz0CX@work-vm>
[-- Attachment #1: Type: text/plain, Size: 878 bytes --]
Hi Dave.
What is the smallest supported page size?
On Wed, Mar 17, 2021 at 10:14 PM Dr. David Alan Gilbert <dgilbert@redhat.com>
wrote:
> Hi Michael,
> I noticed your AVR code defines:
>
> #define TARGET_PAGE_BITS 8
>
> and has an explanation of why.
>
> Note however that's not going to work with the current live
> migration/snapshotting code, since you're a couple of bits smaller
> than the smallest page size we had so far, and for many years
> the RAM migration code has stolen the bottom few bits of the address
> as a flag field, and has already used 0x100 up; see migration/ram.c
> RAM_SAVE_FLAG_* - and it's actually tricky to change it, because if
> you change it then it'll break migration compatibility with existing
> qemu's.
>
> Hmm.
>
> Dave
>
> --
> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
>
>
--
Best Regards,
Michael Rolnik
[-- Attachment #2: Type: text/html, Size: 1431 bytes --]
next prev parent reply other threads:[~2021-03-17 21:34 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 20:14 of AVR target page size Dr. David Alan Gilbert
2021-03-17 21:32 ` Michael Rolnik [this message]
2021-03-18 9:55 ` Dr. David Alan Gilbert
2021-03-18 10:15 ` Michael Rolnik
2021-03-18 10:21 ` Dr. David Alan Gilbert
2021-03-17 22:33 ` Peter Maydell
2021-03-18 7:37 ` Michael Rolnik
2021-03-18 10:18 ` Dr. David Alan Gilbert
2021-03-18 10:21 ` Peter Maydell
2021-03-18 10:25 ` Dr. David Alan Gilbert
2021-03-18 10:34 ` Peter Maydell
2021-03-18 10:45 ` Dr. David Alan Gilbert
2021-03-18 11:03 ` Michael Rolnik
2021-03-18 20:03 ` Dr. David Alan Gilbert
2021-03-18 11:12 ` Peter Maydell
2021-03-18 20:05 ` Dr. David Alan Gilbert
2021-03-18 20:14 ` Peter Maydell
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='CAK4993j08YrWb4CFZ_rgiCdGQDcc7fCcL4O3VT9Zz3mGL=9+2Q@mail.gmail.com' \
--to=mrolnik@gmail.com \
--cc=dgilbert@redhat.com \
--cc=philmd@redhat.com \
--cc=qemu-devel@nongnu.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 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).