From: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
To: qemu-devel@nongnu.org, vkuznets@redhat.com, mst@redhat.com,
jasowang@redhat.com, pbonzini@redhat.com
Subject: [PATCH v2 0/3] exclude hyperv synic sections from vhost
Date: Mon, 13 Jan 2020 17:36:44 +0000 [thread overview]
Message-ID: <20200113173647.84842-1-dgilbert@redhat.com> (raw)
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Hyperv's synic (that we emulate) is a feature that allows the guest
to place some magic (4k) pages of RAM anywhere it likes in GPA.
This confuses vhost's RAM section merging when these pages
land over the top of hugepages.
Since they're not normal RAM, and they shouldn't have vhost DMAing
into them, exclude them from the vhost set.
This v2 is a complete rework after the v1 review; I've now got
a flag on MemoryRegion's that we set.
bz: https://bugzilla.redhat.com/show_bug.cgi?id=1779041
Dr. David Alan Gilbert (3):
vhost: Add names to section rounded warning
memory: Allow a MemoryRegion to be marked no_vhost
hyperv/synic: Mark regions as no vhost
hw/hyperv/hyperv.c | 8 ++++++++
hw/virtio/vhost.c | 10 ++++++----
include/exec/memory.h | 21 +++++++++++++++++++++
memory.c | 15 +++++++++++++++
4 files changed, 50 insertions(+), 4 deletions(-)
--
2.24.1
next reply other threads:[~2020-01-13 17:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 17:36 Dr. David Alan Gilbert (git) [this message]
2020-01-13 17:36 ` [PATCH v2 1/3] vhost: Add names to section rounded warning Dr. David Alan Gilbert (git)
2020-01-13 17:36 ` [PATCH v2 2/3] memory: Allow a MemoryRegion to be marked no_vhost Dr. David Alan Gilbert (git)
2020-01-14 7:19 ` Michael S. Tsirkin
2020-01-14 11:26 ` Dr. David Alan Gilbert
2020-01-14 14:52 ` Michael S. Tsirkin
2020-01-14 15:02 ` Alex Williamson
2020-01-13 17:36 ` [PATCH v2 3/3] hyperv/synic: Mark regions as no vhost Dr. David Alan Gilbert (git)
2020-01-13 18:13 ` [PATCH v2 0/3] exclude hyperv synic sections from vhost Paolo Bonzini
2020-01-13 18:58 ` Dr. David Alan Gilbert
2020-01-14 7:17 ` Michael S. Tsirkin
2020-01-17 12:35 ` Dr. David Alan Gilbert
2020-01-15 12:12 ` Roman Kagan
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