1523562e21
- kvm-migration-Do-not-re-read-the-clock-on-pre_save-in-ca.patch [bz#1747836] - kvm-ehci-fix-queue-dev-null-ptr-dereference.patch [bz#1746790] - kvm-spapr-Use-SHUTDOWN_CAUSE_SUBSYSTEM_RESET-for-CAS-reb.patch [bz#1743477] - kvm-file-posix-Handle-undetectable-alignment.patch [bz#1749134] - kvm-block-posix-Always-allocate-the-first-block.patch [bz#1749134] - kvm-iotests-Test-allocate_first_block-with-O_DIRECT.patch [bz#1749134] - Resolves: bz#1743477 (Since bd94bc06479a "spapr: change default interrupt mode to 'dual'", QEMU resets the machine to select the appropriate interrupt controller. And -no-reboot prevents that.) - Resolves: bz#1746790 (qemu core dump while migrate from RHEL7.6 to RHEL8.1) - Resolves: bz#1747836 (Call traces after guest migration due to incorrect handling of the timebase) - Resolves: bz#1749134 (I/O error when virtio-blk disk is backed by a raw image on 4k disk)
102 lines
3.4 KiB
Diff
102 lines
3.4 KiB
Diff
From 8b0a69f11052d271ef49db0051d79e7f1a6102be Mon Sep 17 00:00:00 2001
|
|
From: David Gibson <dgibson@redhat.com>
|
|
Date: Mon, 2 Sep 2019 04:20:32 +0100
|
|
Subject: [PATCH 1/6] migration: Do not re-read the clock on pre_save in case
|
|
of paused guest
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: David Gibson <dgibson@redhat.com>
|
|
Message-id: <20190902042032.25987-1-dgibson@redhat.com>
|
|
Patchwork-id: 90226
|
|
O-Subject: [RHEL-AV-8.1.0 qemu-kvm PATCH] migration: Do not re-read the clock on pre_save in case of paused guest
|
|
Bugzilla: 1747836
|
|
RH-Acked-by: Thomas Huth <thuth@redhat.com>
|
|
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
|
|
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
|
From: "Maxiwell S. Garcia" <maxiwell@linux.ibm.com>
|
|
|
|
Re-read the timebase before migrate was ported from x86 commit:
|
|
6053a86fe7bd: kvmclock: reduce kvmclock difference on migration
|
|
|
|
The clock move makes the guest knows about the paused time between
|
|
the stop and migrate commands. This is an issue in an already-paused
|
|
VM because some side effects, like process stalls, could happen
|
|
after migration.
|
|
|
|
So, this patch checks the runstate of guest in the pre_save handler and
|
|
do not re-reads the timebase in case of paused state (cold migration).
|
|
|
|
Signed-off-by: Maxiwell S. Garcia <maxiwell@linux.ibm.com>
|
|
Message-Id: <20190711194702.26598-1-maxiwell@linux.ibm.com>
|
|
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
|
|
(cherry picked from commit d14f33976282a8744ca1bf1d64e73996c145aa3f)
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1747836
|
|
Branch: rhel8/rhel-av-8.1.0/master-4.1.0
|
|
Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=23282250
|
|
Testing: Booted guest with this qemu
|
|
|
|
Signed-off-by: David Gibson <dgibson@redhat.com>
|
|
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
---
|
|
hw/ppc/ppc.c | 13 +++++++++----
|
|
target/ppc/cpu-qom.h | 1 +
|
|
2 files changed, 10 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
|
|
index a9e508c..8572e45 100644
|
|
--- a/hw/ppc/ppc.c
|
|
+++ b/hw/ppc/ppc.c
|
|
@@ -1008,6 +1008,8 @@ static void timebase_save(PPCTimebase *tb)
|
|
* there is no need to update it from KVM here
|
|
*/
|
|
tb->guest_timebase = ticks + first_ppc_cpu->env.tb_env->tb_offset;
|
|
+
|
|
+ tb->runstate_paused = runstate_check(RUN_STATE_PAUSED);
|
|
}
|
|
|
|
static void timebase_load(PPCTimebase *tb)
|
|
@@ -1051,9 +1053,9 @@ void cpu_ppc_clock_vm_state_change(void *opaque, int running,
|
|
}
|
|
|
|
/*
|
|
- * When migrating, read the clock just before migration,
|
|
- * so that the guest clock counts during the events
|
|
- * between:
|
|
+ * When migrating a running guest, read the clock just
|
|
+ * before migration, so that the guest clock counts
|
|
+ * during the events between:
|
|
*
|
|
* * vm_stop()
|
|
* *
|
|
@@ -1068,7 +1070,10 @@ static int timebase_pre_save(void *opaque)
|
|
{
|
|
PPCTimebase *tb = opaque;
|
|
|
|
- timebase_save(tb);
|
|
+ /* guest_timebase won't be overridden in case of paused guest */
|
|
+ if (!tb->runstate_paused) {
|
|
+ timebase_save(tb);
|
|
+ }
|
|
|
|
return 0;
|
|
}
|
|
diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
|
|
index be9b4c3..5fbcdee 100644
|
|
--- a/target/ppc/cpu-qom.h
|
|
+++ b/target/ppc/cpu-qom.h
|
|
@@ -201,6 +201,7 @@ typedef struct PowerPCCPUClass {
|
|
typedef struct PPCTimebase {
|
|
uint64_t guest_timebase;
|
|
int64_t time_of_the_day_ns;
|
|
+ bool runstate_paused;
|
|
} PPCTimebase;
|
|
|
|
extern const struct VMStateDescription vmstate_ppc_timebase;
|
|
--
|
|
1.8.3.1
|
|
|