powerKVM to give more power when switching back
to host, so introduce sys_allowed cpumask to reflect the cpuset which
the vcpu thread can run on.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
include/linux/init_task.h | 1 +
include/linux/sched.h | 6 ++
kernel/sched
and coreB, we want to enable KVM on coreA,
while keeping coreB unchanged.
In fact, I try to acheive something un-symmetric on the platform. Do
you think it is an justification?
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kernel/sysfs.c| 39
mode.
(I thought that anti_tickless thread can goto NAP, so we can let the
secondary run).
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kernel/sysfs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc
for dedicated KVM env. Achieve this by setting
paca-online as false.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/paca.h | 3 +++
arch/powerpc/kernel/asm-offsets.c | 3 +++
arch/powerpc/kernel/smp.c | 3 +++
arch/powerpc
time.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 6 ++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 89ea16c..a817ba6 100644
--- a/arch
On Mon, Oct 27, 2014 at 2:44 PM, Preeti U Murthy
pre...@linux.vnet.ibm.com wrote:
On 10/17/2014 01:00 AM, kernelf...@gmail.com wrote:
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/Kconfig | 4
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kvm
On Tue, Jul 29, 2014 at 2:57 PM, Benjamin Herrenschmidt
b...@kernel.crashing.org wrote:
On Mon, 2014-07-28 at 15:58 +0800, Liu ping fan wrote:
Hope I am right. Take the following seq as an example
if (hptep[0] HPTE_V_VALID) {
/* HPTE was previously valid, so we need to invalidate
In current code, the setup of hpte is under the risk of race with
mmu_notifier_invalidate, i.e we may setup a hpte with a invalid pfn.
Resolve this issue by sync the two actions by KVMPPC_RMAP_LOCK_BIT.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm
, 2014 at 2:42 PM, Benjamin Herrenschmidt
b...@kernel.crashing.org wrote:
On Mon, 2014-07-28 at 14:09 +0800, Liu Ping Fan wrote:
In current code, the setup of hpte is under the risk of race with
mmu_notifier_invalidate, i.e we may setup a hpte with a invalid pfn.
Resolve this issue by sync the two
is
marked with _PAGE_NUMA, it will NOT be mapped in real mode, instead, it will
be mapped in virt mode and have the opportunity to be checked with placement.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
Reviewed-by: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
---
v4:
more detail
is
marked with _PAGE_NUMA, it will NOT be mapped in real mode, instead, it will
be mapped in virt mode and have the opportunity to be checked with placement.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
Reviewed-by: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
---
v4:
more detail
On Mon, Apr 14, 2014 at 2:43 PM, Alexander Graf ag...@suse.de wrote:
On 13.04.14 04:27, Liu ping fan wrote:
On Fri, Apr 11, 2014 at 10:03 PM, Alexander Graf ag...@suse.de wrote:
On 11.04.2014, at 13:45, Liu Ping Fan pingf...@linux.vnet.ibm.com
wrote:
When we mark pte with _PAGE_NUMA we
On Mon, Apr 14, 2014 at 2:43 PM, Alexander Graf ag...@suse.de wrote:
On 13.04.14 04:27, Liu ping fan wrote:
On Fri, Apr 11, 2014 at 10:03 PM, Alexander Graf ag...@suse.de wrote:
On 11.04.2014, at 13:45, Liu Ping Fan pingf...@linux.vnet.ibm.com
wrote:
When we mark pte with _PAGE_NUMA we
On Fri, Apr 11, 2014 at 10:03 PM, Alexander Graf ag...@suse.de wrote:
On 11.04.2014, at 13:45, Liu Ping Fan pingf...@linux.vnet.ibm.com wrote:
When we mark pte with _PAGE_NUMA we already call
mmu_notifier_invalidate_range_start
and mmu_notifier_invalidate_range_end, which will mark existing
When we mark pte with _PAGE_NUMA we already call
mmu_notifier_invalidate_range_start
and mmu_notifier_invalidate_range_end, which will mark existing guest hpte
entry as HPTE_V_ABSENT. Now we need to do that when we are inserting new
guest hpte entries.
Signed-off-by: Liu Ping Fan pingf
On Mon, Apr 7, 2014 at 4:36 PM, Alexander Graf ag...@suse.de wrote:
On 07.04.14 09:42, Aneesh Kumar K.V wrote:
Alexander Graf ag...@suse.com writes:
On 03.04.14 04:36, Liu ping fan wrote:
Hi Alex, could you help to pick up this patch? since v3.14 kernel can
enable numa fault for powerpc
Hi Alex, could you help to pick up this patch? since v3.14 kernel can
enable numa fault for powerpc.
Thx,
Fan
On Mon, Jan 27, 2014 at 5:11 PM, Alexander Graf ag...@suse.de wrote:
On 21.01.2014, at 10:42, Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
wrote:
Liu Ping Fan kernelf
);
shm_unlink(SHM_FNAME);
}
On Mon, Jan 20, 2014 at 10:48 PM, Alexander Graf ag...@suse.de wrote:
On 15.01.2014, at 07:36, Liu ping fan kernelf...@gmail.com wrote:
On Thu, Jan 9, 2014 at 8:08 PM, Alexander Graf ag...@suse.de wrote:
On 11.12.2013, at 09:47, Liu Ping Fan kernelf...@gmail.com wrote
To make sure that on host, the pages marked with _PAGE_NUMA result in a fault
when guest access them, we should force the checking when guest uses hypercall
to setup hpte.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
v2:
It should be the reply to [PATCH 2/4] powernv: kvm: make
To make sure that on host, the pages marked with _PAGE_NUMA result in a fault
when guest access them, we should force the checking when guest uses hypercall
to setup hpte.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
v2:
It should be the reply to [PATCH 2/4] powernv: kvm: make
On Tue, Jan 21, 2014 at 11:40 AM, Aneesh Kumar K.V
aneesh.ku...@linux.vnet.ibm.com wrote:
Liu ping fan kernelf...@gmail.com writes:
On Mon, Jan 20, 2014 at 11:45 PM, Aneesh Kumar K.V
aneesh.ku...@linux.vnet.ibm.com wrote:
Liu ping fan kernelf...@gmail.com writes:
On Thu, Jan 9, 2014 at 8:08
On Tue, Jan 21, 2014 at 5:07 PM, Liu ping fan kernelf...@gmail.com wrote:
On Tue, Jan 21, 2014 at 11:40 AM, Aneesh Kumar K.V
aneesh.ku...@linux.vnet.ibm.com wrote:
Liu ping fan kernelf...@gmail.com writes:
On Mon, Jan 20, 2014 at 11:45 PM, Aneesh Kumar K.V
aneesh.ku...@linux.vnet.ibm.com
On Mon, Jan 20, 2014 at 11:45 PM, Aneesh Kumar K.V
aneesh.ku...@linux.vnet.ibm.com wrote:
Liu ping fan kernelf...@gmail.com writes:
On Thu, Jan 9, 2014 at 8:08 PM, Alexander Graf ag...@suse.de wrote:
On 11.12.2013, at 09:47, Liu Ping Fan kernelf...@gmail.com wrote:
This series is based
On Thu, Jan 9, 2014 at 8:08 PM, Alexander Graf ag...@suse.de wrote:
On 11.12.2013, at 09:47, Liu Ping Fan kernelf...@gmail.com wrote:
This series is based on Aneesh's series [PATCH -V2 0/5] powerpc: mm: Numa
faults support for ppc64
For this series, I apply the same idea from the previous
that I have a good justification -- the fact of
heavy cost when switching context between guest and host,
which is well known.
If my suppose is correct, will CCing k...@vger.kernel.org from next version.
Liu Ping Fan (4):
mm: export numa_migrate_prep()
powernv: kvm: make _PAGE_NUMA take
It will be helpful for next patch
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
Can it be merged with the next patch?
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 10 +++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
b/arch
To make _PAGE_NUMA take effect, we should force the checking when
guest uses hypercall to setup hpte.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm
The period check of _PAGE_NUMA can probably happen on the correctly
placed page. For this case, when guest try to setup hpte in real mode,
we try to resolve the numa fault in real mode, since the switch between
guest context and host context costs too much.
Signed-off-by: Liu Ping Fan pingf
powerpc will use it in fast path.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
include/linux/mm.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5ab0e22..420fb77 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
On Tue, Nov 19, 2013 at 6:39 PM, Alexander Graf ag...@suse.de wrote:
On 19.11.2013, at 07:12, Liu Ping Fan kernelf...@gmail.com wrote:
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Suppose the following scene:
Two physical cpuM
On Tue, Nov 19, 2013 at 6:39 PM, Alexander Graf ag...@suse.de wrote:
On 19.11.2013, at 07:12, Liu Ping Fan kernelf...@gmail.com wrote:
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Suppose the following scene:
Two physical cpuM
In some scene, e.g openstack CI, PR guest can trigger sc 1 frequently,
this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL
to HV guest, so powernv can return to HV guest without heavy exit, i.e,
no need to swap TLB, HTAB,.. etc
Signed-off-by: Liu Ping Fan pingf
! deadlock happens
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 6 +-
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 4
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm
! deadlock happens
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 6 +-
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 4
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm
In some scene, e.g openstack CI, PR guest can trigger sc 1 frequently,
this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL
to HV guest, so powernv can return to HV guest without heavy exit, i.e,
no need to swap TLB, HTAB,.. etc
Signed-off-by: Liu Ping Fan pingf
In some scene, e.g openstack CI, PR guest can trigger sc 1 frequently,
this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL
to HV guest, so powernv can return to HV guest without heavy exit, i.e,
no need to swap TLB, HTAB,.. etc
Signed-off-by: Liu Ping Fan pingf
In some scene, e.g openstack CI, PR guest can trigger sc 1 frequently,
this patch optimizes the path by directly delivering BOOK3S_INTERRUPT_SYSCALL
to HV guest, so powernv can return to HV guest without heavy exit, i.e,
no need to swap TLB, HTAB,.. etc
Signed-off-by: Liu Ping Fan pingf
! deadlock happens
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
v4: remove the over-engineered part and keep it simple, also add some notes.
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 6 +-
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 4
2 files changed, 9 insertions(+), 1
On Fri, Nov 8, 2013 at 12:19 PM, Liu ping fan kernelf...@gmail.com wrote:
On Fri, Nov 8, 2013 at 11:10 AM, Alexander Graf ag...@suse.de wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a very common behavior inside guest, and this patch
optimizes the path
On Thu, Nov 7, 2013 at 5:54 PM, Alexander Graf ag...@suse.de wrote:
On 07.11.2013, at 07:22, Liu Ping Fan kernelf...@gmail.com wrote:
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Suppose the following scene:
Two physical cpuM
On Thu, Nov 7, 2013 at 6:06 PM, Alexander Graf ag...@suse.de wrote:
On 07.11.2013, at 07:22, Liu Ping Fan kernelf...@gmail.com wrote:
ret is assigned twice with the same value, so remove the later one.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
Acked-by: Paul Mackerras pau
syscall is a very common behavior inside guest, and this patch
optimizes the path for the emulation of BOOK3S_INTERRUPT_SYSCALL,
so hypervisor can return to guest without heavy exit, i.e, no need
to swap TLB, HTAB,.. etc
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
Compiled
On Fri, Nov 8, 2013 at 11:10 AM, Alexander Graf ag...@suse.de wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall is a very common behavior inside guest, and this patch
optimizes the path for the emulation of BOOK3S_INTERRUPT_SYSCALL,
so hypervisor can return
On Fri, Nov 8, 2013 at 12:11 PM, Benjamin Herrenschmidt
b...@kernel.crashing.org wrote:
On Fri, 2013-11-08 at 15:05 +1100, Benjamin Herrenschmidt wrote:
On Fri, 2013-11-08 at 04:10 +0100, Alexander Graf wrote:
On 08.11.2013, at 03:44, Liu Ping Fan kernelf...@gmail.com wrote:
syscall
! deadlock happens
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/include/asm/kvm_book3s.h | 4 ++--
arch/powerpc/kvm/book3s_64_mmu_hv.c | 5 +++--
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 20
3 files changed, 21 insertions(+), 8 deletions(-)
diff
v2-v3:
introduce kvmppc_hv_unlock_hpte() to pair with kvmppc_hv_find_lock_hpte()
and hide the preemption detail inside this pair from the callers
Liu Ping Fan (2):
powerpc: kvm: pair kvmppc_hv_find_lock_hpte with _unlock_hpte
powerpc: kvm: fix rare but potential deadlock scene
arch
ret is assigned twice with the same value, so remove the later one.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
Acked-by: Paul Mackerras pau...@samba.org
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b
On Wed, Nov 6, 2013 at 1:04 PM, Paul Mackerras pau...@samba.org wrote:
On Tue, Nov 05, 2013 at 03:42:43PM +0800, Liu Ping Fan wrote:
Since kvmppc_hv_find_lock_hpte() is called from both virtmode and
realmode, so it can trigger the deadlock.
Good catch, we should have preemption disabled while
! deadlock happens
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 043eec8..28160ac 100644
--- a/arch/powerpc/kvm
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 28160ac..7682837 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
that if primary vcpu runs, the secondary vcpu can not be scheduled.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
arch/powerpc/kvm/book3s_hv.c | 9 ++---
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 62a2b5a
Nowadays, irqfd can emulate trigger mode, but it can not emulate
trigger polarity. While in some cases, ioapic ioredtbl[x] expects
_low_ active. So equipping irqfd with the ability. Correspondingly,
resamplefd will have the same polarity as irqfd.
Signed-off-by: Liu Ping Fan pingf
On Wed, Nov 2, 2011 at 11:31 PM, Alex Williamson
alex.william...@redhat.com wrote:
On Wed, 2011-11-02 at 13:26 +0800, Kai Huang wrote:
Hi,
In case of direct io, without the interrupt remapping in IOMMU (intel
VT-d or AMD IOMMU), hypervisor needs to inject interrupt for guest
when the guest
On Wed, Nov 2, 2011 at 11:31 PM, Alex Williamson
alex.william...@redhat.com wrote:
On Wed, 2011-11-02 at 13:26 +0800, Kai Huang wrote:
Hi,
In case of direct io, without the interrupt remapping in IOMMU (intel
VT-d or AMD IOMMU), hypervisor needs to inject interrupt for guest
when the guest
On Wed, Aug 14, 2013 at 10:50 AM, Alex Williamson
alex.william...@redhat.com wrote:
On Wed, 2013-08-14 at 10:37 +0800, Liu ping fan wrote:
On Wed, Nov 2, 2011 at 11:31 PM, Alex Williamson
alex.william...@redhat.com wrote:
On Wed, 2011-11-02 at 13:26 +0800, Kai Huang wrote:
Hi,
In case
On Thu, Oct 25, 2012 at 1:16 AM, Vasilis Liaskovitis
vasilis.liaskovi...@profitbricks.com wrote:
Hi,
On Wed, Oct 24, 2012 at 12:15:17PM +0200, Stefan Hajnoczi wrote:
On Wed, Oct 24, 2012 at 10:06 AM, liu ping fan qemul...@gmail.com wrote:
On Tue, Oct 23, 2012 at 8:25 PM, Stefan Hajnoczi
On Tue, Oct 23, 2012 at 8:25 PM, Stefan Hajnoczi stefa...@gmail.com wrote:
On Fri, Sep 21, 2012 at 01:17:21PM +0200, Vasilis Liaskovitis wrote:
+static void dimm_populate(DimmDevice *s)
+{
+DeviceState *dev= (DeviceState*)s;
+MemoryRegion *new = NULL;
+
+new =
On Mon, Sep 3, 2012 at 7:48 PM, Avi Kivity a...@redhat.com wrote:
On 09/03/2012 09:44 AM, Juan Quintela wrote:
Hi
Please send in any agenda items you are interested in covering.
- protecting MemoryRegion::opaque during dispatch
I'm guessing Ping won't make it due to timezone problems.
On Tue, Sep 4, 2012 at 4:21 PM, Avi Kivity a...@redhat.com wrote:
On 09/04/2012 11:17 AM, liu ping fan wrote:
On Mon, Sep 3, 2012 at 7:48 PM, Avi Kivity a...@redhat.com wrote:
On 09/03/2012 09:44 AM, Juan Quintela wrote:
Hi
Please send in any agenda items you are interested in covering
On Sat, Aug 11, 2012 at 9:58 AM, liu ping fan qemul...@gmail.com wrote:
On Wed, Aug 8, 2012 at 5:41 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 09:25 AM, Liu Ping Fan wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Flatview and radix view are all under the protection of pointer
On Thu, Aug 9, 2012 at 4:00 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 09/08/2012 09:28, liu ping fan ha scritto:
VCPU threadI/O thread
=
get MMIO request
rcu_read_lock()
walk
On Thu, Aug 9, 2012 at 3:40 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 09/08/2012 09:28, liu ping fan ha scritto:
+static void
+pci_e1000_unmap(PCIDevice *p)
+{
+/* DO NOT FREE anything!until refcnt=0 */
+/* isolate from memory view */
+}
At least you need to call
On Thu, Aug 9, 2012 at 4:18 PM, Avi Kivity a...@redhat.com wrote:
On 08/09/2012 10:49 AM, Paolo Bonzini wrote:
Il 09/08/2012 09:33, liu ping fan ha scritto:
Yes, it is to defer destructors.
See 0009-memory-prepare-flatview-and-radix-tree-for-rcu-style.patch
When MemoryRegion is _del_subregion
On Thu, Aug 9, 2012 at 4:38 PM, Avi Kivity a...@redhat.com wrote:
On 08/09/2012 10:27 AM, liu ping fan wrote:
On Wed, Aug 8, 2012 at 5:20 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 09:25 AM, Liu Ping Fan wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Using refcnt for mr, so
On Wed, Aug 8, 2012 at 5:41 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 09:25 AM, Liu Ping Fan wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Flatview and radix view are all under the protection of pointer.
And this make sure the change of them seem to be atomic!
The mr
On Wed, Aug 8, 2012 at 5:20 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 09:25 AM, Liu Ping Fan wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Using refcnt for mr, so we can separate mr's life cycle management
from refered object.
When mr-ref 0-1, inc the refered object
On Wed, Aug 8, 2012 at 5:42 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 09:25 AM, Liu Ping Fan wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Please explain the motivation. AFAICT, the big qemu lock is sufficient.
Oh, this is one of the series locks for the removal of big
On Wed, Aug 8, 2012 at 5:41 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 08/08/2012 08:25, Liu Ping Fan ha scritto:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
cpus.c | 12
main-loop.h |3 +++
2
On Wed, Aug 8, 2012 at 5:56 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 08/08/2012 08:25, Liu Ping Fan ha scritto:
+static void
+pci_e1000_unmap(PCIDevice *p)
+{
+/* DO NOT FREE anything!until refcnt=0 */
+/* isolate from memory view */
+}
At least you need to call
On Wed, Aug 8, 2012 at 5:52 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 08/08/2012 08:25, Liu Ping Fan ha scritto:
+void qdev_unplug_complete(DeviceState *dev, Error **errp)
+{
+/* isolate from mem view */
+qdev_unmap(dev);
+qemu_lock_devtree();
+/* isolate from device
On Thu, Aug 9, 2012 at 3:17 AM, Blue Swirl blauwir...@gmail.com wrote:
On Wed, Aug 8, 2012 at 6:25 AM, Liu Ping Fan qemul...@gmail.com wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Using mem_map_lock to protect among updaters. So we can get the intact
snapshot of mem topology
On Wed, Aug 8, 2012 at 5:13 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 09:25 AM, Liu Ping Fan wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Using mem_map_lock to protect among updaters. So we can get the intact
snapshot of mem topology -- FlatView radix-tree.
Signed-off
On Thu, Aug 9, 2012 at 3:18 AM, Blue Swirl blauwir...@gmail.com wrote:
On Wed, Aug 8, 2012 at 6:25 AM, Liu Ping Fan qemul...@gmail.com wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
PhysMap contain the flatview and radix-tree view, they are snapshot
of system topology and should
On Thu, Aug 9, 2012 at 3:23 AM, Blue Swirl blauwir...@gmail.com wrote:
On Wed, Aug 8, 2012 at 6:25 AM, Liu Ping Fan qemul...@gmail.com wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Flatview and radix view are all under the protection of pointer.
And this make sure the change of them
On Wed, Aug 8, 2012 at 5:15 PM, Avi Kivity a...@redhat.com wrote:
On 08/08/2012 12:07 PM, Paolo Bonzini wrote:
Il 08/08/2012 11:05, Avi Kivity ha scritto:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Collect unused object and release them at caller demand.
Please explain
On Wed, Aug 8, 2012 at 5:35 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 08/08/2012 08:25, Liu Ping Fan ha scritto:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Collect unused object and release them at caller demand.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
include/qemu/object.h |3 ++-
qom/object.c | 13 +
2 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/include/qemu/object.h b/include/qemu/object.h
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Collect unused object and release them at caller demand.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
include/qemu/reclaimer.h | 28 ++
main-loop.c |5
qemu-tool.c |5
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Using mem_map_lock to protect among updaters. So we can get the intact
snapshot of mem topology -- FlatView radix-tree.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
exec.c |3 +++
memory.c | 22
background:
refer to orignal plan posted by Marcelo Tosatti,
http://lists.gnu.org/archive/html/qemu-devel/2012-06/msg04315.html
prev version:
https://lists.gnu.org/archive/html/qemu-devel/2012-07/msg03312.html
changes v1-v2
--introduce atomic ops
--introduce ref cnt for MemoryRegion
--make
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
The types of referred object by MemoryRegion are variable, ex,
another mr, DeviceState, or other struct defined by drivers.
So the refer/unrefer may be different by drivers.
Using this ops, we can mange the backend object.
Signed-off-by: Liu Ping
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Using refcnt for mr, so we can separate mr's life cycle management
from refered object.
When mr-ref 0-1, inc the refered object.
When mr-ref 1-0, dec the refered object.
The refered object can be DeviceStae, another mr, or other opaque.
Signed
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
If out of global lock, we will be challenged by SMP in low level,
so need atomic ops.
This file is heavily copied from kernel. Currently, only x86 atomic ops
included, and will be extended for other arch for future.
Signed-off-by: Liu Ping Fan
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
memory_region_{add,del}_subregion will inc/dec mr's refcnt.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
memory.c |4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/memory.c b/memory.c
index 5dc8b59..2eaa2fc
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
PhysMap contain the flatview and radix-tree view, they are snapshot
of system topology and should be consistent. With PhysMap, we can
swap the pointer when updating and achieve the atomic.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Flatview and radix view are all under the protection of pointer.
And this make sure the change of them seem to be atomic!
The mr accessed by radix-tree leaf or flatview will be reclaimed
after the prev PhysMap not in use any longer
Signed-off
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Change tcg code to use PhysMap.
This is separated from the prev patch for review purpose. Should be
merged into prev one.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
exec.c | 27 +--
1 files changed, 21
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
cpus.c | 12
main-loop.h |3 +++
2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/cpus.c b/cpus.c
index b182b3d..a734b36 100644
--- a/cpus.c
+++ b
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
lock:
qemu_device_tree_mutex
competitors:
--device_del(destruction of device will be postphoned until unplug
ack from guest),
--pci hot-unplug
--iteration (qdev_reset_all)
--device_add
Signed-off-by: Liu Ping Fan pingf
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
When guest confirm the removal of device, we should
--unmap from MemoryRegion view
--isolated from device tree view
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
hw/acpi_piix4.c |4 ++--
hw/pci.c| 13 -
hw
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
iohandler/bh/timer may use DeviceState when its refcnt=0,
postpone the reclaimer till they have done with it.
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
qom/object.c |9 -
1 files changed, 8 insertions(+), 1 deletions
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
Signed-off-by: Liu Ping Fan pingf...@linux.vnet.ibm.com
---
hw/e1000.c |8
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/hw/e1000.c b/hw/e1000.c
index 4573f13..fa71455 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -1192,6
On Wed, Jul 25, 2012 at 5:08 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 25/07/2012 05:31, Liu Ping Fan ha scritto:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
rwlock:
qemu_device_tree_mutex
rd side:
--device_del(destruction of device will be postphoned until unplug
ack
On Wed, Jul 25, 2012 at 5:18 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 25/07/2012 10:12, liu ping fan ha scritto:
+qemu_rwlock_rdlock_devtree();
section = phys_page_find(page TARGET_PAGE_BITS);
+if (!(memory_region_is_ram(section-mr
On Wed, Jul 25, 2012 at 8:27 PM, Avi Kivity a...@redhat.com wrote:
On 07/25/2012 01:58 PM, Avi Kivity wrote:
while (len 0) {
page = addr TARGET_PAGE_MASK;
l = (page + TARGET_PAGE_SIZE) - addr;
if (l len)
l = len;
+
+
On Thu, Jul 26, 2012 at 9:00 PM, Avi Kivity a...@redhat.com wrote:
On 07/26/2012 03:56 PM, liu ping fan wrote:
On Wed, Jul 25, 2012 at 5:08 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 25/07/2012 05:31, Liu Ping Fan ha scritto:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
rwlock
On Thu, Jul 26, 2012 at 9:15 PM, Avi Kivity a...@redhat.com wrote:
On 07/26/2012 04:14 PM, liu ping fan wrote:
From the description above, I don't see why it can't be a mutex.
Searching in the device tree (or MemoryRegion view) can be often in
parallel, especially in mmio-dispatch code path
On Wed, Jul 25, 2012 at 3:43 PM, Stefan Hajnoczi stefa...@gmail.com wrote:
On Wed, Jul 25, 2012 at 4:31 AM, Liu Ping Fan qemul...@gmail.com wrote:
@@ -3396,13 +3420,25 @@ void cpu_physical_memory_rw(target_phys_addr_t addr,
uint8_t *buf,
uint32_t val;
target_phys_addr_t page
On Wed, Jul 25, 2012 at 3:37 PM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 25/07/2012 09:03, Stefan Hajnoczi ha scritto:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
iohandler/bh/timer may use DeviceState when its refcnt=0,
It's not clear how to me. The only reference to devices from
On Wed, Jul 25, 2012 at 3:03 PM, Stefan Hajnoczi stefa...@gmail.com wrote:
On Wed, Jul 25, 2012 at 4:31 AM, Liu Ping Fan qemul...@gmail.com wrote:
From: Liu Ping Fan pingf...@linux.vnet.ibm.com
iohandler/bh/timer may use DeviceState when its refcnt=0,
postpone the reclaimer till they have
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