On Sat, Jul 05, 2014 at 02:40:55AM +0100, Al Viro wrote:
> d) at least on EV6 and EV67 DNOD *still* trips INV. According to the
> manual suppression of INV by DNOD is optional. And while their text
> might be interpreted as "INV is suppressed if operation with denorm
> wouldn't result in somethin
On Sat, Jul 5, 2014 at 12:09 AM, Paolo Bonzini wrote:
> Il 04/07/2014 17:57, Ming Lei ha scritto:
>
>> But we have two cases to consider:
>>
>> - one submitted IO includes requests from multi vq(virtio-blk or
>> virtio-scsi maybe),
>> and each vq has to notify guest
>>
>> - one submitted IO includ
Now requests are submitted as a batch, so it is natural
to notify guest as a batch too.
This may suppress interrupt notification to VM a lot:
- in my test, decreased by ~13K/sec
Signed-off-by: Ming Lei
---
hw/block/dataplane/virtio-blk.c | 22 --
1 file changed, 2
The callback has to be saved and reset in virtio_blk_data_plane_start(),
otherwise dataplane's requests will be completed in qemu aio context.
Signed-off-by: Ming Lei
---
hw/block/dataplane/virtio-blk.c |7 ---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/hw/block/datapl
Hi,
The first one fixes one problem introduced recently.
The second one suppresses notifications to guest a lot.
V1:
- use BH to suppress notifications to guest as suggested
by Paolo
Thanks,
--
Ming Lei
On Sat, 5 Jul 2014, Peter Maydell wrote:
> On 4 July 2014 19:47, Stefano Stabellini
> wrote:
> > Fixes to build QEMU with Xen support on ARM and ARM64. Most fixes are
> > due to the fact that xen_pfn_t is 64-bit sized on arm32, while it is an
> > unsigned long on x86_32.
> > Although QEMU can be c
Denorms fun:
a) softfloat.c raises flags we don't care about. So checking that
FP_STATUS.float_exception_flags is non-zero is *not* good - we catch
false positives that way.
b) DNZ has effect *only* for /S insns. Without /S denorm means INV and
that's it. FPCR.INV isn't set, at that.
pc-0.13 and older were missing some compat code that is present on newer
machine-types:
* x86_cpu_compat_disable_kvm_features(FEAT_1_ECX, CPUID_EXT_X2APIC);
(pc-i440fx-1.7 and older)
* x86_cpu_compat_set_features("n270", FEAT_1_ECX, 0, CPUID_EXT_MOVBE);
(pc-i440fx-1.4 and older)
* x86_cpu_comp
This looks like a step backwards, but it will allow pc-0.1[0123] reuse
pc_compat_1_2() instead of duplicating the code from all pc_compat_*()
functions.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 13 -
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/hw/i386/
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 8
hw/i386/pc_q35.c | 6 +++---
include/hw/i386/pc.h | 1 +
4 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index b2f7931..7f44b3b 100644
--- a/hw/i386/pc.
Finally eliminate all *_machine_options() functions, and make the
class_init functions for older machine-types simply reuse the class_init
functions from newer machine-types.
To allow compat_props reuse, the the PC_COMPAT_* macros were changed to
not nest within the older PC_COMPAT_* macros anymor
The VGA and vmware-svga rombar compat properties were added by commit
281a26b15b4adcecb8604216738975abd754bea8, but only to pc-0.13 and
pc-0.12. This breaks the PC_COMPAT_* nesting pattern we currently
follow.
The new variables will now be inherited by pc-0.11 and older, but
pc-0.11 and pc-0.10 al
This allows us to eliminate all the trivial pc_init_*() functions which
just call a compat function followed by pc_init1(), and slowly move
duplicate code from piix and q35 init functions into common PC code.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 12
hw/i386/pc_piix.
This way, these settings can be simply set on the class_init function,
instead of requiring a separate machine init function just to set global
variables.
Signed-off-by: Eduardo Habkost
---
hw/core/loader.c| 12 +++-
hw/core/machine.c | 1 +
hw/i386/pc_piix.c | 8
hw/i
Instead of calling it on every i440fx class_init function, just register
a common parent class for all i440fx machine-types.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 55 +--
1 file changed, 29 insertions(+), 26 deletions(-)
diff
The only PC machines that didn't call pc_default_machine_options() were
isaps and xenfv. Both were already overwriting max_cpus, and only isapc
was not overwriting hot_add_cpu.
After making isapc set hot_add_cpu to NULL, we can move the
pc_default_machine_options() code the PC common class_init.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 9 -
hw/i386/pc_q35.c | 7 +++
include/hw/i386/pc.h | 1 +
4 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index ef4b586..b2f7931 100644
--- a/hw/i386/p
Those properties were introduced by commit
3827cdb1c3aa17a792d1658161195b9d7173c26b. They were not duplicated into
pc-0.13 and older because 0.14 was the first QEMU version supporting
qxl. The only problem is that this breaks the PC_COMPAT_* nesting
pattern we currently use.
So, move the propertie
When all a compat function does is to call the previous compat function,
we don't need to set compat_func, as the previous class_init function
already set it.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 29 +
hw/i386/pc_q35.c | 21 +
2
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 17 +++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 5fca2c5..01730ea 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -399,6 +399,20 @@ static void pc_xen_h
Now pc_init1() can be called directly.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 25 ++---
1 file changed, 10 insertions(+), 15 deletions(-)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 18ac698..5fca2c5 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 11 +++
hw/i386/pc_q35.c | 9 ++---
include/hw/i386/pc.h | 5 +
4 files changed, 11 insertions(+), 15 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 7f44b3b..3fe5764 100644
-
Interestingly, no existing code sets has_pci_info=true at all.
A has_pci_info=false line was added to isapc class_init, just in case we
enable it on the other PC machine-types one day.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c| 6 ++
hw/i386/pc_q35.c | 4 +---
include/hw/
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 11 +++
include/hw/i386/pc.h | 1 +
3 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 7a6aa66..465efee 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -16
Signed-off-by: Eduardo Habkost
---
Changes v2:
* Use PCMachineState fields inside pc_memory_init() too
---
hw/i386/pc.c | 8 +++-
hw/i386/pc_piix.c| 19 ---
hw/i386/pc_q35.c | 22 +-
include/hw/i386/pc.h | 5 +++--
4 files changed, 23 ins
"pcms" being the initials of "PCMachineState". The variable will be used
a lot, so it's better to make it short.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 10 +-
hw/i386/pc_q35.c | 10 +-
2 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/hw/i386/pc_pi
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 92 +++
1 file changed, 45 insertions(+), 47 deletions(-)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 94e9dfe..3716f98 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@
The function was used only in a single place.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_q35.c | 7 +--
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index bf85c17..9eeeac6 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -449,11 +
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 6 +++---
include/hw/i386/pc.h | 1 +
3 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 465efee..ef4b586 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1663,6 +16
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 8 +++-
hw/i386/pc_q35.c | 6 ++
include/hw/i386/pc.h | 1 +
4 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 3fe5764..571d47b 100644
--- a/hw/i386/pc.
The only user of QEMUMachine.compat_props was the PC code, that was
already converted to QOM. We don't need that field anymore.
Signed-off-by: Eduardo Habkost
---
include/hw/boards.h | 1 -
vl.c| 3 ---
2 files changed, 4 deletions(-)
diff --git a/include/hw/boards.h b/include/h
Instead of calling it on every q35 class_init function, just register a
common parent class for all q35 machine-types.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_q35.c | 34 ++
1 file changed, 18 insertions(+), 16 deletions(-)
diff --git a/hw/i386/pc_q35.c b/h
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c| 9 +
hw/i386/pc_q35.c | 7 ---
include/hw/i386/pc.h | 1 +
3 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index e26fedd..22388c1 100644
--- a/hw/i386/pc_piix.c
+++ b/hw
The TYPE_PC_MACHINE parent class can initialize the common options for
all PC machines.
Reviewed-by: Andreas Färber
Signed-off-by: Eduardo Habkost
---
hw/i386/pc.c | 1 +
hw/i386/pc_piix.c| 2 --
include/hw/i386/pc.h | 6 --
3 files changed, 1 insertion(+), 8 deletions(-)
diff
This will make it easier to write reusable class_init code which adds
properties to MachineClass.compat_props.
Signed-off-by: Eduardo Habkost
---
hw/core/machine.c| 15 +++
hw/core/qdev-properties.c| 9 +
hw/i386/pc.c | 4 +++-
include/hw/boa
Little step towards making the q35 and piix init functions converge, to
eliminate duplication.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_q35.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 491fee7..d50dd89 100644
--- a/hw/i3
This is a (mostly) blind and mechanical conversion of the PC QEMUMachine
definitions to corresponding class registration code.
Existing duplication and unnecessary complexity on macro/function reuse
is being kept, to keep the conversion simple to review. The complexity
and duplication will be grad
The compat property was added by commit
9dbcca5aa13cb9ab40788ac4c56bc227d94ca920, and the pc-0.12 and older
machine-types were not changed because virtio-9p-pci was introduced on QEMU
0.13 (commit 9f10751365b26b13b8a9b67e0e90536ae3d282df). The only problem is
that this breaks the PC_COMPAT_* nestin
The current code setting ide-drive.ver and scsi-disk.ver on pc-0.11
breaks the PC_COMPAT_* nesting pattern we currently use.
As those variables are overwritten in pc-0.10 too, they can be inherited
by pc-0.10 with no side-effects at all.
Signed-off-by: Eduardo Habkost
Cc: Gerd Hoffmann
---
hw/
Instead of following a different pattern from all other PC init
functions, make pc-0.13 and older reuse pc_compat_1_2() and simply set
kvmclock_enabled=false.
Signed-off-by: Eduardo Habkost
---
hw/i386/pc_piix.c | 36
1 file changed, 8 insertions(+), 28 delet
Instead of using an array when registering a single global, simply call
qdev_prop_register().
Reviewed-by: Andreas Färber
Signed-off-by: Eduardo Habkost
---
vl.c | 39 +++
1 file changed, 15 insertions(+), 24 deletions(-)
diff --git a/vl.c b/vl.c
index 6e084
Signed-off-by: Eduardo Habkost
---
include/hw/i386/pc.h | 12 ++--
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 1c0c382..4a9eb46 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -440,23 +440,23 @@ bool e820_
New version, rebased to latest qemu.git master.
Git tree:
https://github.com/ehabkost/qemu-hacks/tree/pc-machine-class.v3
I would like to get this discussed/reviewed before QEMU 2.1.0 is released, so we
can be ready to include the series as soon as we start 2.2 development.
My goal is that _
On 4 July 2014 19:47, Stefano Stabellini
wrote:
> Fixes to build QEMU with Xen support on ARM and ARM64. Most fixes are
> due to the fact that xen_pfn_t is 64-bit sized on arm32, while it is an
> unsigned long on x86_32.
> Although QEMU can be compiled with full emulation support, on ARM we
> only
KVM_FEATURE_CLOCKSOURCE_STABLE_BIT is enabled by default and supported
by KVM. But not having a name defined makes QEMU treat it as an unknown
and unmigratable feature flag (as any unknown feature may possibly
require state to be migrated), and disable it by default on "-cpu host".
As a side-effec
Signed-off-by: Cole Robinson
---
Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 1eea0c4..d6b9dc1 100644
--- a/Makefile
+++ b/Makefile
@@ -344,7 +344,8 @@ multiboot.bin linuxboot.bin kvmvapic.bin \
s390-zipl.rom \
s390-ccw.img \
spapr-rt
From: "Dr. David Alan Gilbert"
The loading of a device state (during postcopy) may access guest
memory that's still on the source machine and thus might need
a page fill; split off a separate thread that handles the incoming
page data so that the original incoming migration code can finish
off th
From: "Dr. David Alan Gilbert"
QEMU_VM_CMD_PACKAGED is a migration command that allows a chunk
of migration stream to be sent in one go, and be received by
a separate instance of the loadvm loop while not interacting
with the migration stream.
This is used by postcopy to load device state (from
From: "Dr. David Alan Gilbert"
There are currently lots of pieces of incoming migration state scattered
around, and postcopy is adding more, and it seems better to try and keep
it together.
allocate MIS in process_incoming_migration_co
Add MIS to QEMUFile
Signed-off-by: Dr. David Alan Gilbert
From: "Dr. David Alan Gilbert"
Misses out lines that are all 0 so can be quite compact
depending on the circumstance.
Signed-off-by: Dr. David Alan Gilbert
---
arch_init.c | 39 +++
include/migration/migration.h | 1 +
2 files changed, 40
From: "Dr. David Alan Gilbert"
Open a return path, and handle messages that are received upon it.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 10 +++
migration.c | 142 +-
2 files changed, 151 insertions(+
From: "Dr. David Alan Gilbert"
and use it in loadvm_state.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/qemu-file.h | 2 ++
qemu-file.c | 15 +++
savevm.c | 18 ++
3 files changed, 27 insertions(+), 8 deletions(
From: "Dr. David Alan Gilbert"
This is mostly as an easy way to get to the MigrationIncomingState
that I'm hanging off the file.
Signed-off-by: Dr. David Alan Gilbert buf_size = pending;
len = f->ops->get_buffer(f->opaque, f->buf + pending, f->pos,
-IO_BUF_SIZE - p
From: "Dr. David Alan Gilbert"
Add lots of DPRINTF debug in qemu_loadvm*
Signed-off-by: Dr. David Alan Gilbert
---
savevm.c | 23 +--
1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/savevm.c b/savevm.c
index 16b672b..662a910 100644
--- a/savevm.c
+++ b/savevm
From: "Dr. David Alan Gilbert"
postcopy_place_page (etc) provide a way for postcopy to place a page
into guests memory atomically (using the new remap_anon_pages syscall).
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h| 1 +
include/migration/postcopy-ram.h | 23
Hi all,
qemu-2.1-rc0 upsets some of libvirt's qemu feature introspection, the example
I hit is with bootindex support. qemu -device virtio-blk,? no longer lists the
bootindex= property, so libvirt thinks that qemu doesn't support it, and fails
to launch a VM with per-device boot order configuratio
Fixes to build QEMU with Xen support on ARM and ARM64. Most fixes are
due to the fact that xen_pfn_t is 64-bit sized on arm32, while it is an
unsigned long on x86_32.
Although QEMU can be compiled with full emulation support, on ARM we
only care about the PV backends.
Signed-off-by: Stefano Stabel
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 1 +
postcopy-ram.c| 93 +--
2 files changed, 90 insertions(+), 4 deletions(-)
diff --git a/include/migration/migration.h b/include/
From: "Dr. David Alan Gilbert"
Use that to split the qemu_savevm_state_pending counts into postcopiable
and non-postcopiable amounts
Signed-off-by: Dr. David Alan Gilbert
---
arch_init.c | 7 +++
include/migration/vmstate.h | 2 +-
include/sysemu/sysemu.h | 4 +++-
m
From: "Dr. David Alan Gilbert"
Wire up more of the handlers for the commands on the destination side,
in particular loadvm_postcopy_ram_handle_run now has enough to start the
guest running.
Signed-off-by: Dr. David Alan Gilbert
---
savevm.c | 47 ++-
From: "Dr. David Alan Gilbert"
check the return value of the function it calls and error if it's none-0
Fixup qemu_rdma_init_one_block that is the only current caller,
and __qemu_rdma_add_block the only function it calls using it.
Pass the name of the ramblock to the function; helps in debuggi
From: "Dr. David Alan Gilbert"
Suspend to file is very much like a migrate, and it makes life
easier if we have the Migration state available, so initialise it
in the savevm.c code for suspending.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 1 +
include/qemu/typed
From: "Dr. David Alan Gilbert"
Add migrate_send_rp_message to send a message from destination to source along
the return path.
(It uses a mutex to let it be called from multiple threads)
Add migrate_send_rp_ack to send an 'ack' message
Use it in the CMD_REQACK handler
Signed-off-by: Dr. Dav
From: "Dr. David Alan Gilbert"
Add MIG_RPCOMM_REQPAGES command on Return path for the postcopy
destination to request a page from the source.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 3 ++
migration.c | 75
From: "Dr. David Alan Gilbert"
Add somewhere for the various migration parameters to be set with
one command;
As suggested in the thread:
http://lists.gnu.org/archive/html/qemu-devel/2012-11/msg00243.html
There are many existing migration parameters that are scattered over
many individual comma
From: "Dr. David Alan Gilbert"
Provide a check to see if the OS we're running on has all the bits
needed for postcopy.
Creates postcopy-ram.c which will get most of the other helpers we need.
Signed-off-by: Dr. David Alan Gilbert
---
Makefile.objs| 2 +-
include/migratio
From: "Dr. David Alan Gilbert"
Postcopy sends RAMBlock names and offsets over the wire (since it can't
rely on the order of ramaddr being the same), and it starts out with
HVA fault addresses from the kernel.
qemu_ram_block_from_host translates a HVA into a RAMBlock, an offset
in the RAMBlock, t
From: "Dr. David Alan Gilbert"
Postcopy needs to have two migration streams loading concurrently;
one from memory (with the device state) and the other from the fd
with the memory transactions.
Split the core of qemu_loadvm_state out so we can use it for both.
Allow the inner loadvm loop to qui
From: "Dr. David Alan Gilbert"
Add state variable showing current incoming postcopy state.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 8 ++
include/sysemu/sysemu.h | 23
savevm.c | 313 ++
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 1 +
migration.c | 9 +
qapi-schema.json | 6 +-
3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/include/migration/migration.h b/inc
From: "Dr. David Alan Gilbert"
In postcopy, the destination guest is running at the same time
as it's receiving pages; as we receive new pages we must put
them into the guests address space atomically to avoid a running
CPU accessing a partially written page.
Use the helpers in postcopy-ram.c to
From: "Dr. David Alan Gilbert"
On receiving MIG_RPCOMM_REQPAGES look up the address and
queue the page.
Signed-off-by: Dr. David Alan Gilbert
---
arch_init.c | 52 +++
include/migration/migration.h | 26 ++
include/q
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 3 +++
postcopy-ram.c| 23 +++
2 files changed, 26 insertions(+)
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 397f41
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
migration.c | 12
1 file changed, 12 insertions(+)
diff --git a/migration.c b/migration.c
index c73fcfa..c7ba6a1 100644
--- a/migration.c
+++ b/migration.c
@@ -1164,6 +1164,18 @@ void migrate_fd_connect(Migra
From: "Dr. David Alan Gilbert"
Switch to postcopy if:
1) There's still a significant amount to transfer
2) Postcopy is enabled
3) It's taken longer than the time set by the parameter.
and change the cleanup at the end of migration to match.
Signed-off-by: Dr. David Alan Gilbert
---
m
From: "Dr. David Alan Gilbert"
postcopy_start:
Perform all the initialisation associated with starting up postcopy
mode from the source.
Signed-off-by: Dr. David Alan Gilbert
---
migration.c | 85 +
1 file changed, 85 insertions(+)
From: "Dr. David Alan Gilbert"
When transmitting RAM pages, consume pages that have been queued by
MIG_RPCOMM_REQPAGE commands and send them ahead of normal page scanning.
Note:
a) After a queued page the linear walk carries on from after the
unqueued page; there is a reasonable chance that th
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
arch_init.c | 11 +++
include/migration/migration.h | 1 +
migration.c | 2 ++
3 files changed, 14 insertions(+)
diff --git a/arch_init.c b/arch_init.c
index 134ea7e..fd7399c
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/postcopy-ram.h | 5 +
postcopy-ram.c | 36 +++-
2 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/include/migration/postcopy-ram.h b/inc
From: "Dr. David Alan Gilbert"
When postcopy calls qemu_savevm_state_complete it's not really
the end of migration, so skip:
a) Finishing postcopiable iterative devices - they'll carry on
b) The termination byte on the end of the stream.
We then also add:
qemu_savevm_state_postcopy_compl
From: "Dr. David Alan Gilbert"
Provide functions to be called before the start of a postcopy
enabled migration (even if it's not eventually used) and
at the end.
During the init we must disable huge pages in the RAM that
we will receive postcopy data into, since if they start off
as hugepage and
From: "Dr. David Alan Gilbert"
Where postcopy is preceeded by a period of precopy, the destination will
have received pages that may have been dirtied on the source after the
page was sent. The destination must throw these pages away before
starting it's CPUs.
Maintain a 'sentmap' of pages that
From: "Dr. David Alan Gilbert"
Tweak the end of migration cleanup; we don't want to close stuff down
at the end of the main stream, since the postcopy is still sending pages
on the other thread.
Signed-off-by: Dr. David Alan Gilbert
---
migration.c | 20
1 file changed, 20
From: "Dr. David Alan Gilbert"
'MIG_STATE_POSTCOPY_ACTIVE' is entered after the precopy timelimit
has expired and migration switches to postcopy.
'migration_postcopy_phase' is provided for other sections to know if
they're in postcopy.
Signed-off-by: Dr. David Alan Gilbert
---
include/migrati
From: "Dr. David Alan Gilbert"
userfaultfd is a Linux syscall that gives an fd that receives a stream
of notifications of accesses to pages marked as MADV_USERFAULT, and
allows the program to acknowledge those stalls and tell the accessing
thread to carry on.
Signed-off-by: Dr. David Alan Gilber
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
docs/migration.txt | 148 +
1 file changed, 148 insertions(+)
diff --git a/docs/migration.txt b/docs/migration.txt
index 0492a45..dbd5e5f 100644
--- a/docs/migration.txt
From: "Dr. David Alan Gilbert"
Add two src->dest commands:
* OPENRP - To request that the destination open the return path
* REQACK - Request an acknowledge from the destination
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h | 2 ++
include/sysemu/sysemu.h
From: "Dr. David Alan Gilbert"
Create QEMU_VM_COMMAND section type for sending commands from
source to destination. These commands are not intended to convey
guest state but to control the migration process.
For use in postcopy.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/mig
From: "Dr. David Alan Gilbert"
The return path uses a non-blocking fd so as not to block waiting
for the (possibly broken) destination to finish returning a message,
however we still want outbound data to behave in the same way and block.
Signed-off-by: Dr. David Alan Gilbert
---
qemu-file.c |
From: "Dr. David Alan Gilbert"
Signed-off-by: Dr. David Alan Gilbert
---
arch_init.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch_init.c b/arch_init.c
index c006d21..58eccc1 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -439,6 +439,7 @@ ram_addr_t
migration_bitmap_find_and_reset_di
From: "Dr. David Alan Gilbert"
Postcopy needs a method to send messages from the destination back to
the source, this is the 'return path'.
Wire it up for 'socket' QEMUFile's using a dup'd fd.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/qemu-file.h | 8 +
qemu-file.c
From: "Dr. David Alan Gilbert"
The PMI holds the state of each page on the incoming side,
so that we can tell if the page is missing, already received
or there is a request outstanding for it.
Signed-off-by: Dr. David Alan Gilbert
---
include/migration/migration.h| 18 ++
include/migr
From: "Dr. David Alan Gilbert"
Stefan Berger's patch to create a QEMUFile that goes to a memory buffer;
from:
http://lists.gnu.org/archive/html/qemu-devel/2013-03/msg05036.html
Using the QEMUFile interface, this patch adds support functions for
operating on in-memory sized buffers that can be w
From: "Dr. David Alan Gilbert"
Improve the existing DPRINTF macros in migration.c and arch_init
by:
1) Making them go to stderr rather than stdout (so you can run with
-nographic and redirect your debug to a file)
2) Making them print the ms time with each debug - useful for
debugging latency
From: "Dr. David Alan Gilbert"
Hi,
This is the 1st cut of my version of postcopy; it is designed for use with
the Linux kernel additions recently posted by Andrea Arcangeli here:
http://lists.gnu.org/archive/html/qemu-devel/2014-07/msg00525.html
The current status is:
1) It works - I've
Il 04/07/2014 17:57, Ming Lei ha scritto:
But we have two cases to consider:
- one submitted IO includes requests from multi vq(virtio-blk or
virtio-scsi maybe),
and each vq has to notify guest
- one submitted IO includes requests from multi bs for scsi device
The 2nd case should be easy to ha
Can we pretty please take me off the list of recepients. I have nothing to do
with this, I receive all list emails already, and where I am now it is quite
dificult to sort mail, and it costs me quite some time to do so too.
When I'm back I'll concider dropping mails sent to list and Cc'd to me.
On 4 July 2014 16:35, Frederic Konrad wrote:
> Hi everybody,
>
> We are experimenting with multi-core QEMU. We have Multiple QEMU cores
> running
> on multiple host threads and we are now looking at the issue of ‘atomic’
> instructions.
>
> Our initial thought was to push some sort of set of flags
On Fri, Jul 4, 2014 at 11:48 PM, Paolo Bonzini wrote:
> Il 04/07/2014 16:52, Ming Lei ha scritto:
>
>>> > What you can do is change notify_guest to something like
>>> >
>>> > qemu_bh_schedule(req->dev->dataplane->notify_guest_bh);
>>> >
>>> > and do the actual notification in the bottom half.
If a read request goes across EOF, the block driver sees a shortened
request that stops at EOF (the rest is memsetted in block.c), however
the original qiov was used for this request.
This patch makes the qiov size match the request size, avoiding a
potential buffer overflow in raw-posix.
Signed-
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