2007/7/24, Avi Kivity [EMAIL PROTECTED]:
Shaohua Li wrote:
Make KVM guest pages be allocated dynamically and able to be swaped out.
One issue: all inodes returned from anon_inode_getfd are shared,
if one module changes field of the inode, other moduels might break.
Should we introduce
2007/7/24, Avi Kivity [EMAIL PROTECTED]:
Shaohua Li wrote:
gfn_to_page might sleep with swap support. Move it out of the kmap calls.
I'd like to apply this to the kvm.git master branch so we don't have to
maintain it. Was this tested on a highmem machine? If not, I can do it.
My test
From: Avi Kivity [EMAIL PROTECTED]
To: Li, Shaohua [EMAIL PROTECTED]
Date: Tue, 24 Jul 2007 13:42:29 +0800
Subject: Re: [RFC 0/8]KVM: swap out guest pages
Shaohua Li wrote:
On Mon, 2007-07-23 at 18:27 +0800, Avi Kivity wrote:
Shaohua Li wrote:
This patch series make kvm guest
This patch series make kvm guest pages be able to be swapped out and
dynamically allocated. Without it, all guest memory is allocated at
guest start time.
patches are against latest git, and you need first patch Avi's kvm-sch
integration patch
fix some bugs in kvm-sch patch.
1. vmcs_readl/vmcs_writel are called with preempt enabled
2. preempt_count check doesn't make sense with preempt disabled
3. vmx_cpu_run doesn't handle error correctly and kvm_mmu_reload might
sleep with mutex changes, so I move it above.
Signed-off-by: Shaohua Li
export symbols kvm swapout required
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
Index: linux/mm/swap_state.c
===
--- linux.orig/mm/swap_state.c 2007-07-23 13:06:20.0 +0800
+++ linux/mm/swap_state.c 2007-07-23 13:29
convert kvm lock to a mutex.
TBD: after this change, a lot of logic in kvm can be simplified, eg, we
don't need release lock and then do operation blocking.
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
---
drivers/kvm/kvm.h |2 -
drivers/kvm/kvm_main.c | 58
gfn_to_page might sleep with swap support. Move it out of the kmap calls.
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
---
drivers/kvm/kvm.h |2 -
drivers/kvm/kvm_main.c|9 ++---
drivers/kvm/mmu.c |2 -
drivers/kvm/paging_tmpl.h | 80
Make shadow page table rmap readonly pages.
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
---
drivers/kvm/mmu.c | 66 ++
drivers/kvm/paging_tmpl.h |2 -
2 files changed, 39 insertions(+), 29 deletions(-)
Index: linux/drivers/kvm/mmu.c
add a routine to zap all shadow pgtble for a gfn. If kvm supports SMP,
the API should zap pgtble for all vcpus, but kvm shadow page table
really should be per-vm, instead of per-vcpu.
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
---
drivers/kvm/kvm.h |1 +
drivers/kvm/mmu.c | 28
Make KVM guest pages be allocated dynamically and able to be swaped out.
One issue: all inodes returned from anon_inode_getfd are shared,
if one module changes field of the inode, other moduels might break.
Should we introduce a new API to not share inode?
Signed-off-by: Shaohua Li [EMAIL
KVM use gfn_to_page very frequestly, which makes find_get_page a bottleneck,
so cache pages found to speed up.
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
---
drivers/kvm/kvm.h |1 +
drivers/kvm/kvm_main.c |9 +
2 files changed, 10 insertions(+)
Index: linux/drivers/kvm
On Mon, 2007-07-23 at 18:27 +0800, Avi Kivity wrote:
Shaohua Li wrote:
This patch series make kvm guest pages be able to be swapped out and
dynamically allocated. Without it, all guest memory is allocated at
guest start time.
patches are against latest git, and you need first patch
On Mon, 2007-07-23 at 18:46 +0800, Avi Kivity wrote:
Shaohua Li wrote:
fix some bugs in kvm-sch patch.
There is now a 'preempt-hooks' branch on kvm.git with the
preempt-hooks
work. I'll continually update and rebase it against master.
1. vmcs_readl/vmcs_writel are called
On Mon, 2007-07-23 at 19:16 +0800, Avi Kivity wrote:
Shaohua Li wrote:
add a routine to zap all shadow pgtble for a gfn. If kvm supports
SMP,
the API should zap pgtble for all vcpus, but kvm shadow page table
really should be per-vm, instead of per-vcpu.
kvm shadow page tables
On Mon, 2007-07-23 at 20:34 +0800, Christoph Hellwig wrote:
On Mon, Jul 23, 2007 at 03:29:36PM +0300, Avi Kivity wrote:
Actually it requires lots of deep down VM internals symbols that'll
never
get exported.
What's it here? kvm-specific address space or generic vmas.
The
On Sun, 2007-07-08 at 20:58 +0800, Avi Kivity wrote:
The only fly in the ointment is that it crashes quite soon. Haven't
figured
out why yet, but comments on the general direction would be welcome.
Attached patch seems help in my test. prepare_task_switch is called with
irq disabled.
Sounds like a obvious bug to me. Other places doing tlb flush do the right
thing.
Signed-off-by: Shaohua Li [EMAIL PROTECTED]
Index: kvm-28/kernel/mmu.c
===
--- kvm-28.orig/kernel/mmu.c2007-06-20 16:52:46.0 +0800
On Thu, 2007-06-07 at 17:10 +0800, Shaohua Li wrote:
On Wed, 2007-06-06 at 09:18 +0800, Shaohua Li wrote:
On Tue, 2007-06-05 at 22:17 +0800, Avi Kivity wrote:
Shaohua Li wrote:
Hi,
This is a updated patch set of swap out kvm guest pages.Changes are:
1. refresh against to kvm-26
On Wed, 2007-06-06 at 09:18 +0800, Shaohua Li wrote:
On Tue, 2007-06-05 at 22:17 +0800, Avi Kivity wrote:
Shaohua Li wrote:
Hi,
This is a updated patch set of swap out kvm guest pages.Changes are:
1. refresh against to kvm-26
2. clean up shadow page handling to make gfn_to_page
On Tue, 2007-06-05 at 22:17 +0800, Avi Kivity wrote:
Shaohua Li wrote:
Hi,
This is a updated patch set of swap out kvm guest pages.Changes are:
1. refresh against to kvm-26
2. clean up shadow page handling to make gfn_to_page not be called
within kmap_atomic/kunamp_atomic.
3. variant
Hi,
This is a updated patch set of swap out kvm guest pages.Changes are:
1. refresh against to kvm-26
2. clean up shadow page handling to make gfn_to_page not be called
within kmap_atomic/kunamp_atomic.
3. variant bug fixing. Now the patch is quite stable in my test.
4. make swap out optional. A
On Thu, 2007-05-24 at 20:10 +0800, Avi Kivity wrote:
The following patchset makes kvm more robust wrt cpu hotunplug, and
makes suspend-to-ram actually work. Suspend-to-disk benefits from
the cpu hotunplug improvements as well.
The major issue is that KVM wants to disable the virtualization
Hi,
I saw some discussions on the topic but no progress. I did an
experiment to make guest page be allocated dynamically and swap out.
please see attachment patches. It's not yet for merge but I'd like get
some suggestions and help. Patches (against kvm-19) work here but
maybe not very stable as
When testing CPU hotplug, I found cpu can't be onlined with kvm enabled
sometimes. The reason is smp_call_function_single is a nop if the thread
is running on the target cpu. I think CPU_ONLINE case doesn't require
the fix as the online CPU isn't plugged into sheduler yet.
Signed-off-by: Shaohua
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