From: Cornelia Huck <cohuck@redhat.com>
To: David Hildenbrand <david@redhat.com>
Cc: Tony Krowiak <akrowiak@linux.ibm.com>,
Eric Farman <farman@linux.ibm.com>,
Alex Williamson <alex.williamson@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
kvm@vger.kernel.org, "Michael S . Tsirkin" <mst@redhat.com>,
Pierre Morel <pmorel@linux.ibm.com>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
qemu-devel@nongnu.org, Halil Pasic <pasic@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
qemu-s390x@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH v4 02/21] vfio: Convert to ram_block_discard_disable()
Date: Tue, 16 Jun 2020 13:15:20 +0200 [thread overview]
Message-ID: <20200616131520.3eb92b8c.cohuck@redhat.com> (raw)
In-Reply-To: <20200610115419.51688-3-david@redhat.com>
On Wed, 10 Jun 2020 13:54:00 +0200
David Hildenbrand <david@redhat.com> wrote:
> VFIO is (except devices without a physical IOMMU or some mediated devices)
> incompatible with discarding of RAM. The kernel will pin basically all VM
> memory. Let's convert to ram_block_discard_disable(), which can now
> fail, in contrast to qemu_balloon_inhibit().
>
> Leave "x-balloon-allowed" named as it is for now.
>
> Cc: Cornelia Huck <cohuck@redhat.com>
> Cc: Alex Williamson <alex.williamson@redhat.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Tony Krowiak <akrowiak@linux.ibm.com>
> Cc: Halil Pasic <pasic@linux.ibm.com>
> Cc: Pierre Morel <pmorel@linux.ibm.com>
> Cc: Eric Farman <farman@linux.ibm.com>
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
> hw/vfio/ap.c | 10 +++----
> hw/vfio/ccw.c | 11 ++++----
> hw/vfio/common.c | 53 +++++++++++++++++++----------------
> hw/vfio/pci.c | 6 ++--
> include/hw/vfio/vfio-common.h | 4 +--
> 5 files changed, 45 insertions(+), 39 deletions(-)
Did not have time to review in detail, but looks sane.
Acked-by: Cornelia Huck <cohuck@redhat.com>
next prev parent reply other threads:[~2020-06-16 11:16 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-10 11:53 [PATCH v4 00/21] virtio-mem: Paravirtualized memory hot(un)plug David Hildenbrand
2020-06-10 11:53 ` [PATCH v4 01/21] exec: Introduce ram_block_discard_(disable|require)() David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 02/21] vfio: Convert to ram_block_discard_disable() David Hildenbrand
2020-06-10 13:04 ` Tony Krowiak
2020-06-10 14:13 ` David Hildenbrand
2020-06-16 11:15 ` Cornelia Huck [this message]
2020-06-10 11:54 ` [PATCH v4 03/21] accel/kvm: " David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 04/21] s390x/pv: " David Hildenbrand
2020-06-16 11:17 ` Cornelia Huck
2020-06-10 11:54 ` [PATCH v4 05/21] virtio-balloon: Rip out qemu_balloon_inhibit() David Hildenbrand
2020-06-16 10:56 ` Dr. David Alan Gilbert
2020-06-24 15:32 ` Michael S. Tsirkin
2020-06-10 11:54 ` [PATCH v4 06/21] target/i386: sev: Use ram_block_discard_disable() David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 07/21] migration/rdma: " David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 08/21] migration/colo: " David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 09/21] linux-headers: update to contain virtio-mem David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 10/21] virtio-mem: Paravirtualized memory hot(un)plug David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 11/21] virtio-pci: Proxy for virtio-mem David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 12/21] MAINTAINERS: Add myself as virtio-mem maintainer David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 13/21] hmp: Handle virtio-mem when printing memory device info David Hildenbrand
2020-06-17 17:53 ` Dr. David Alan Gilbert
2020-06-17 17:54 ` Dr. David Alan Gilbert
2020-06-10 11:54 ` [PATCH v4 14/21] numa: Handle virtio-mem in NUMA stats David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 15/21] pc: Support for virtio-mem-pci David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 16/21] virtio-mem: Allow notifiers for size changes David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 17/21] virtio-pci: Send qapi events when the virtio-mem " David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 18/21] virtio-mem: Migration sanity checks David Hildenbrand
2020-06-17 17:59 ` Dr. David Alan Gilbert
2020-06-18 10:39 ` David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 19/21] virtio-mem: Add trace events David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 20/21] virtio-mem: Exclude unplugged memory during migration David Hildenbrand
2020-06-10 11:54 ` [PATCH v4 21/21] numa: Auto-enable NUMA when any memory devices are possible David Hildenbrand
2020-06-24 15:33 ` [PATCH v4 00/21] virtio-mem: Paravirtualized memory hot(un)plug Michael S. Tsirkin
2020-06-24 15:40 ` David Hildenbrand
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=20200616131520.3eb92b8c.cohuck@redhat.com \
--to=cohuck@redhat.com \
--cc=akrowiak@linux.ibm.com \
--cc=alex.williamson@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=david@redhat.com \
--cc=dgilbert@redhat.com \
--cc=ehabkost@redhat.com \
--cc=farman@linux.ibm.com \
--cc=kvm@vger.kernel.org \
--cc=mst@redhat.com \
--cc=pasic@linux.ibm.com \
--cc=pbonzini@redhat.com \
--cc=pmorel@linux.ibm.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-s390x@nongnu.org \
--cc=rth@twiddle.net \
/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).