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
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
);
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
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
! 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
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