From: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
To: qemu-devel@nongnu.org, vkuznets@redhat.com, mst@redhat.com,
jasowang@redhat.com
Subject: [PATCH 0/2] exclude hyperv synic sections from vhost
Date: Wed, 8 Jan 2020 13:53:51 +0000 [thread overview]
Message-ID: <20200108135353.75471-1-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.
I do that by marking them as device-ram and then excluding device-ram
from vhost.
bz: https://bugzilla.redhat.com/show_bug.cgi?id=1779041
Dr. David Alan Gilbert (2):
vhost: Don't pass ram device sections
hyperv/synic: Allocate as ram_device
hw/hyperv/hyperv.c | 14 ++++++++------
hw/virtio/vhost.c | 1 +
2 files changed, 9 insertions(+), 6 deletions(-)
--
2.24.1
next reply other threads:[~2020-01-08 13:55 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 13:53 Dr. David Alan Gilbert (git) [this message]
2020-01-08 13:53 ` [PATCH 1/2] vhost: Don't pass ram device sections Dr. David Alan Gilbert (git)
2020-01-09 11:45 ` Michael S. Tsirkin
2020-01-09 11:56 ` Michael S. Tsirkin
2020-01-09 12:38 ` Roman Kagan
2020-01-09 12:42 ` Michael S. Tsirkin
2020-01-08 13:53 ` [PATCH 2/2] hyperv/synic: Allocate as ram_device Dr. David Alan Gilbert (git)
2020-01-09 11:48 ` Michael S. Tsirkin
2020-01-09 12:08 ` Dr. David Alan Gilbert
2020-01-09 12:18 ` Michael S. Tsirkin
2020-01-09 12:22 ` Dr. David Alan Gilbert
2020-01-09 13:00 ` Vitaly Kuznetsov
2020-01-09 13:24 ` Roman Kagan
2020-01-09 13:28 ` Dr. David Alan Gilbert
2020-01-09 16:12 ` Roman Kagan
2020-01-09 16:27 ` Dr. David Alan Gilbert
2020-01-09 17:13 ` Roman Kagan
2020-01-09 13:06 ` Michael S. Tsirkin
2020-01-09 13:22 ` Dr. David Alan Gilbert
2020-01-09 13:27 ` Michael S. Tsirkin
2020-01-09 13:28 ` Michael S. Tsirkin
2020-01-09 13:40 ` Dr. David Alan Gilbert
2020-01-09 15:31 ` Paolo Bonzini
2020-01-09 15:38 ` Dr. David Alan Gilbert
2020-01-09 15:40 ` Vitaly Kuznetsov
2020-07-07 10:54 ` Paolo Bonzini
2020-01-09 13:03 ` Roman Kagan
2020-01-09 13:08 ` Dr. David Alan Gilbert
2020-01-08 14:26 ` [PATCH 0/2] exclude hyperv synic sections from vhost Vitaly Kuznetsov
2020-01-09 3:00 ` Jason Wang
2020-01-09 9:07 ` Vitaly Kuznetsov
2020-01-09 12:02 ` Dr. David Alan Gilbert
2020-01-09 12:14 ` Michael S. Tsirkin
2020-01-09 11:53 ` Roman Kagan
2020-01-09 12:16 ` Dr. David Alan Gilbert
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