Hi,
It look like commit 6bdb913f0a70a4dfb7f066fb15e2d6f960701d00 break the
semantic of set_pte_at_notify.
The change of calling first to mmu_notifier_invalidate_range_start, then
to set_pte_at_notify, and then to mmu_notifier_invalidate_range_end
not only increase the amount of locks kvm have
On 6/22/2011 3:21 AM, Chris Wright wrote:
* Nai Xia (nai@gmail.com) wrote:
Introduced kvm_mmu_notifier_test_and_clear_dirty(),
kvm_mmu_notifier_dirty_update()
and their mmu_notifier interfaces to support KSM dirty bit tracking, which
brings
significant performance gain in volatile pages
On 6/22/2011 1:43 PM, Avi Kivity wrote:
On 06/21/2011 04:32 PM, Nai Xia wrote:
Introduced kvm_mmu_notifier_test_and_clear_dirty(),
kvm_mmu_notifier_dirty_update()
and their mmu_notifier interfaces to support KSM dirty bit tracking,
which brings
significant performance gain in volatile pages
On 6/22/2011 2:10 PM, Avi Kivity wrote:
On 06/22/2011 02:05 PM, Izik Eidus wrote:
+spte = rmap_next(kvm, rmapp, NULL);
+while (spte) {
+int _dirty;
+u64 _spte = *spte;
+BUG_ON(!(_spte PT_PRESENT_MASK));
+_dirty = _spte PT_DIRTY_MASK;
+if (_dirty
On 6/22/2011 2:33 PM, Nai Xia wrote:
On Wednesday 22 June 2011 19:28:08 Avi Kivity wrote:
On 06/22/2011 02:24 PM, Avi Kivity wrote:
On 06/22/2011 02:19 PM, Izik Eidus wrote:
On 6/22/2011 2:10 PM, Avi Kivity wrote:
On 06/22/2011 02:05 PM, Izik Eidus wrote:
+spte = rmap_next(kvm, rmapp
If we don't flush the smp tlb don't we risk that we'll insert pages in
the unstable tree that are volatile just because the dirty bit didn't
get set again on the spte?
Yes, this is the trade off we take, the unstable tree will be flushed
anyway -
so this is nothing that won`t be recovered
already have timer
that is set, so it like it make the most sense to use it...
If anyone have any better idea how to solve this issue, I will be very
happy to hear.
Thanks.
From 2d9c25f1fee61f50cb130769c3779707a6ef90d9 Mon Sep 17 00:00:00 2001
From: Izik Eidus iei...@redhat.com
Date: Mon, 5 Apr 2010
On Tue, 09 Feb 2010 12:51:47 +0200
Avi Kivity a...@redhat.com wrote:
On 02/01/2010 12:37 PM, Nikola Ciprich wrote:
Hello,
it seems to me that after upgrading to some 2.6.32.x release, KSM stopped
working
for me. I'm not exactly sure which update did this, but enabling KSM doesn't
seem
On Tue, 26 Jan 2010 16:14:47 +0200
Avi Kivity a...@redhat.com wrote:
On 01/25/2010 10:40 PM, Izik Eidus wrote:
Or is this a feature you need?
I dont need it (I asked Avi to do something), So he said he want to nuke
the aliasing
from kvm and keep supporting the old userspace
From f94dcd1ccabbcdb51ed7c37c5f58f00a5c1b7eec Mon Sep 17 00:00:00 2001
From: Izik Eidus iei...@redhat.com
Date: Mon, 25 Jan 2010 15:49:41 +0200
Subject: [PATCH] RFC: alias rework
This patch remove the old way of aliasing inside kvm
and move into using aliasing with the same virtual addresses
On Mon, 25 Jan 2010 17:45:53 -0200
Marcelo Tosatti mtosa...@redhat.com wrote:
Izik,
On Mon, Jan 25, 2010 at 03:53:44PM +0200, Izik Eidus wrote:
From f94dcd1ccabbcdb51ed7c37c5f58f00a5c1b7eec Mon Sep 17 00:00:00 2001
From: Izik Eidus iei...@redhat.com
Date: Mon, 25 Jan 2010 15:49:41 +0200
On Mon, 25 Jan 2010 18:49:25 -0200
Marcelo Tosatti mtosa...@redhat.com wrote:
On Mon, Jan 25, 2010 at 10:40:32PM +0200, Izik Eidus wrote:
On Mon, 25 Jan 2010 18:20:39 -0200
Marcelo Tosatti mtosa...@redhat.com wrote:
With current code, if a memslot is deleted, access through any aliases
From a8ca226de8efb4f0447e4ef87bf034cf18996745 Mon Sep 17 00:00:00 2001
From: Izik Eidus iei...@redhat.com
Date: Sun, 4 Oct 2009 14:01:31 +0200
Subject: [PATCH] kvm-userspace: add ksm support
Calling to madvise(MADV_MERGEABLE) on the memory allocations.
Signed-off-by: Izik Eidus iei...@redhat.com
Hope i fixed everything i was asked...
please tell me if I forgot anything.
Izik Eidus (3):
kvm: dont hold pagecount reference for mapped sptes pages
add SPTE_HOST_WRITEABLE flag to the shadow ptes
add support for change_pte mmu notifiers
arch/x86/include/asm/kvm_host.h |1 +
arch/x86
not increase the
mapcount when mapping page into shadow page table entry,
so when comparing pagecount against mapcount, you have no
reliable result.)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/kvm/mmu.c |7 ++-
1 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86
this flag notify that the host physical page we are pointing to from
the spte is write protected, and therefore we cant change its access
to be write unless we run get_user_pages(write = 1).
(this is needed for change_pte support in kvm)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86
this is needed for kvm if it want ksm to directly map pages into its
shadow page tables.
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 64 +-
virt/kvm/kvm_main.c | 14
Izik Eidus wrote:
this is needed for kvm if it want ksm to directly map pages into its
shadow page tables.
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 64 +-
virt/kvm
Change from v2 : remove unused if.
Thanks.
Izik Eidus (3):
kvm: dont hold pagecount reference for mapped sptes pages
add SPTE_HOST_WRITEABLE flag to the shadow ptes
add support for change_pte mmu notifiers
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 84
not increase the
mapcount when mapping page into shadow page table entry,
so when comparing pagecount against mapcount, you have no
reliable result.)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/kvm/mmu.c |7 ++-
1 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86
this flag notify that the host physical page we are pointing to from
the spte is write protected, and therefore we cant change its access
to be write unless we run get_user_pages(write = 1).
(this is needed for change_pte support in kvm)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86
this is needed for kvm if it want ksm to directly map pages into its
shadow page tables.
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 62 +-
virt/kvm/kvm_main.c | 14
Marcelo Tosatti wrote:
Why can't you use the writable bit in the spte? So that you can only
sync a writeable spte if it was writeable before, in sync_page?
I could, but there we will add overhead for read only gptes that become
writable in the guest...
If you prefer to fault on the syncing
Marcelo Tosatti wrote:
On Thu, Sep 10, 2009 at 07:38:57PM +0300, Izik Eidus wrote:
this flag notify that the host physical page we are pointing to from
the spte is write protected, and therefore we cant change its access
to be write unless we run get_user_pages(write = 1).
(this is needed
Marcelo Tosatti wrote:
On Sat, Sep 12, 2009 at 09:41:10AM +0300, Izik Eidus wrote:
Marcelo Tosatti wrote:
On Thu, Sep 10, 2009 at 07:38:58PM +0300, Izik Eidus wrote:
this is needed for kvm if it want ksm to directly map pages into its
shadow page tables.
Signed-off-by: Izik
Hi,
The following seires add ksm support to the kvm mmu.
Thanks.
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
this flag notify that the host physical page we are pointing to from
the spte is write protected, and therefore we cant change its access
to be write unless we run get_user_pages(write = 1).
(this is needed for change_pte support in kvm)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86
this is needed for kvm if it want ksm to directly map pages into its
shadow page tables.
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 70 ++
virt/kvm/kvm_main.c | 14
that qemu used to have something called phys_ram_base,
in that case it would be just making madvise on phys_ram_base with the
same of phys_ram_size)
(and adding the necessary kernel changes of course)?
On Tuesday 28 July 2009 11:39:59 am Izik Eidus wrote:
This patch
Brian Jackson wrote:
On Monday 03 August 2009 01:09:38 pm Izik Eidus wrote:
Brian Jackson wrote:
If someone wanted to play around with ksm in qemu-kvm-0.x.x would it be
as simple as adding the below additions to kvm_setup_guest_memory in
kvm-all.c
qemu-kvm-0.x.x doesnt tell me
This patch is not for inclusion just rfc.
Thanks.
From 1297b86aa257100b3d819df9f9f0932bf4f7f49d Mon Sep 17 00:00:00 2001
From: Izik Eidus iei...@redhat.com
Date: Tue, 28 Jul 2009 19:14:26 +0300
Subject: [PATCH] kvm userspace: ksm support
rfc for ksm support to kvm userpsace.
thanks
Signed
Anthony Liguori wrote:
Izik Eidus wrote:
This patch is not for inclusion just rfc.
The madvise() interface looks really nice :-)
Thanks.
From 1297b86aa257100b3d819df9f9f0932bf4f7f49d Mon Sep 17 00:00:00 2001
From: Izik Eidus iei...@redhat.com
Date: Tue, 28 Jul 2009 19:14:26 +0300
Marcelo Tosatti wrote:
From: Izik Eidus iei...@redhat.com
First check if the list is empty before attempting to look at list
entries.
Signed-off-by: Izik Eidus iei...@redhat.com
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm/arch/x86/kvm/mmu.c
Marcelo Tosatti wrote:
Remove the bogus n_free_mmu_pages assignment from alloc_mmu_pages.
It breaks accounting of mmu pages, since n_free_mmu_pages is modified
but the real number of pages remains the same.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm/arch/x86/kvm/mmu.c
Avi Kivity wrote:
Izik Eidus wrote:
change the dirty page tracking to work with dirty bity instead of
page fault.
right now the dirty page tracking work with the help of page faults,
when we
want to track a page for being dirty, we write protect it and we mark
it dirty
when we have write page
RFC: move the dirty page tracking to use dirty bit
Well, i was bored this morning and had this idea for a while, didnt test it to
much..., first i want to hear what ppl think?
Thanks.
Izik Eidus (2):
kvm: fix dirty bit tracking for slots with large pages
kvm: change the dirty page tracking
When slot is already allocted and being asked to be tracked we need to break the
large pages.
This code flush the mmu when someone ask a slot to start dirty bit tracking.
Signed-off-by: Izik Eidus iei...@redhat.com
---
virt/kvm/kvm_main.c |2 ++
1 files changed, 2 insertions(+), 0 deletions
right now the dirty page tracking work with the help of page faults, when we
want to track a page for being dirty, we write protect it and we mark it dirty
when we have write page fault, this code move into looking at the dirty bit
of the spte.
Signed-off-by: Izik Eidus iei...@redhat.com
Few quick thoughts:
+void kvm_arch_get_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
+{
+}
+
long kvm_arch_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
diff --git a/arch/x86/include/asm/kvm_host.h
Avi Kivity wrote:
Izik Eidus wrote:
When slot is already allocted and being asked to be tracked we need
to break the
large pages.
This code flush the mmu when someone ask a slot to start dirty bit
tracking.
Signed-off-by: Izik Eidus iei...@redhat.com
---
virt/kvm/kvm_main.c |2 ++
1
RFC move to dirty bit tracking using the page table dirty bit (v2)
(BTW, it seems like the vnc in the mainline have some bugs, i have wasted 2
hours debugging rendering bug that i thought was related to that seires, but
it came out not to be related)
Thanks.
Izik Eidus (2):
kvm: fix dirty
When slot is already allocted and being asked to be tracked we need to break the
large pages.
This code flush the mmu when someone ask a slot to start dirty bit tracking.
Signed-off-by: Izik Eidus iei...@redhat.com
---
virt/kvm/kvm_main.c |2 ++
1 files changed, 2 insertions(+), 0 deletions
Izik Eidus wrote:
+static int vmx_dirty_bit_support(void)
+{
+ return false;
+}
+
Again, idiotic bug: this should be:
return tdp_enable == false;
...
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord...@vger.kernel.org
More
Marcelo Tosatti wrote:
On Wed, Jun 10, 2009 at 07:23:25PM +0300, Izik Eidus wrote:
change the dirty page tracking to work with dirty bity instead of page fault.
right now the dirty page tracking work with the help of page faults, when we
want to track a page for being dirty, we write protect
Izik Eidus wrote:
Marcelo Tosatti wrote:
/* Free page dirty bitmap if unneeded */
-if (!(new.flags KVM_MEM_LOG_DIRTY_PAGES))
+if (!(new.flags KVM_MEM_LOG_DIRTY_PAGES)) {
new.dirty_bitmap = NULL;
+if (old.flags KVM_MEM_LOG_DIRTY_PAGES
Anthony Liguori wrote:
Chris Wright wrote:
* Andrew Morton (a...@linux-foundation.org) wrote:
Breaks ppc64 allmodcofnig because that architecture doesn't export its
copy_user_page() to modules.
Things like this and updating to use madvise() I think all point towards
s/tristate/bool/.
Andrew Morton wrote:
On Mon, 20 Apr 2009 04:36:06 +0300
Izik Eidus iei...@redhat.com wrote:
Ksm is driver that allow merging identical pages between one or more
applications in way unvisible to the application that use it.
Pages that are merged are marked as readonly and are COWed when any
On Tue, 28 Apr 2009 02:12:00 +0300
Izik Eidus iei...@redhat.com wrote:
Andrew Morton wrote:
Breaks sparc64 and probably lots of other architectures:
mm/ksm.c: In function `try_to_merge_two_pages_alloc':
mm/ksm.c:697: error: `_PAGE_RW' undeclared (first use in this
function
Andrew Morton wrote:
On Mon, 20 Apr 2009 04:36:06 +0300
Izik Eidus iei...@redhat.com wrote:
Ksm is driver that allow merging identical pages between one or more
applications in way unvisible to the application that use it.
Pages that are merged are marked as readonly and are COWed when any
Avi Kivity wrote:
Alan Cox wrote:
The minor number you are using already belongs to another project.
10,234 is free but it would be good to know what device naming is
proposed. I imagine other folks would like to know why you aren't using
sysfs or similar or extending /dev/kvm ?
ksm was
other numbers...)
Ok, you are ready :-)
(Just remember, memory that is swapped, isnt scanned by ksm until it
come back to memory, so dont try to raise alot of VMS togather)
Thanks.
Izik Eidus (5):
MMU_NOTIFIERS: add set_pte_at_notify()
add get_pte(): helper function: fetching pte for va
.
(users of mmu_notifiers that didnt implement the set_pte_at_notify()
call back will just recive the mmu_notifier_invalidate_page callback)
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mmu_notifier.h | 34 ++
mm/memory.c | 10
get_pte() receive mm_struct of a task, and a virtual address and return
the pte corresponding to it.
this function return NULL in case it couldnt fetch the pte.
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mm.h | 24
1 files changed, 24 insertions
of this issue is that newpage cannot be anything but
kernel allocated page that is not swappable.
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mm.h |5 +++
mm/memory.c| 80
2 files changed, 85 insertions(+), 0 deletions
and will fork them
when write access will happen to them.
Ksm scan just memory areas that were registred to be scanned by it.
Signed-off-by: Izik Eidus iei...@redhat.com
Signed-off-by: Chris Wright chr...@redhat.com
Signed-off-by: Andrea Arcangeli aarca...@redhat.com
---
include/linux/ksm.h
Nick Piggin wrote:
On Wednesday 15 April 2009 08:09:03 Andrew Morton wrote:
On Thu, 9 Apr 2009 06:58:37 +0300
Izik Eidus iei...@redhat.com wrote:
KSM is a linux driver that allows dynamicly sharing identical memory
pages between one or more processes.
Generally looks OK to me
Andrew Morton wrote:
On Thu, 9 Apr 2009 06:58:41 +0300
Izik Eidus iei...@redhat.com wrote:
Confused. In the covering email you indicated that v2 of the patchset
had abandoned ioctls and had moved the interface to sysfs.
We have abandoned the ioctls that control the ksm behavior (how
Jeremy Fitzhardinge wrote:
Andrew Morton wrote:
+static pte_t *get_pte(struct mm_struct *mm, unsigned long addr)
+{
+pgd_t *pgd;
+pud_t *pud;
+pmd_t *pmd;
+pte_t *ptep = NULL;
+
+pgd = pgd_offset(mm, addr);
+if (!pgd_present(*pgd))
+goto out;
+
+pud =
Izik Eidus wrote:
Marcelo Tosatti wrote:
On Tue, Mar 31, 2009 at 03:00:02AM +0300, Izik Eidus wrote:
When using mmu notifiers, we are allowed to remove the page count
reference tooken by get_user_pages to a specific page that is mapped
inside the shadow page tables.
This is needed so we can
Marcelo Tosatti wrote:
On Tue, Mar 31, 2009 at 03:00:02AM +0300, Izik Eidus wrote:
When using mmu notifiers, we are allowed to remove the page count
reference tooken by get_user_pages to a specific page that is mapped
inside the shadow page tables.
This is needed so we can balance
of this issue is that newpage cannot be anything but
kernel allocated page that is not swappable.
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mm.h |5 +++
mm/memory.c| 80
2 files changed, 85 insertions(+), 0 deletions
.
(users of mmu_notifiers that didnt implement the set_pte_at_notify()
call back will just recive the mmu_notifier_invalidate_page callback)
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mmu_notifier.h | 34 ++
mm/memory.c | 10
kernel and kvm-userspace
that would allow users of kvm to test ksm with it.
The kvm patchs would apply to Avi git tree.
Izik Eidus (4):
MMU_NOTIFIERS: add set_pte_at_notify()
add page_wrprotect(): write protecting page.
add replace_page(): change the page pte is pointing to.
add ksm
another thread read
and writes to/from the first 512bytes of the page. We can lose
O_DIRECT reads, the very moment we mark any pte wrprotected...
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/rmap.h | 11
mm/rmap.c| 139
of pages to share inside this memory region.
__u32 pad;
__u64 addr:
the begining of the virtual address of this region.
__u64 reserved_bits;
reserved bits for future usage.
KSM_REMOVE_MEMORY_REGION:
Remove memory region from ksm.
Signed-off-by: Izik Eidus iei...@redhat.com
Signed-off
Andrey Panin wrote:
On 094, 04 04, 2009 at 05:35:22PM +0300, Izik Eidus wrote:
SNIP
+static inline u32 calc_checksum(struct page *page)
+{
+ u32 checksum;
+ void *addr = kmap_atomic(page, KM_USER0);
+ checksum = jhash(addr, PAGE_SIZE, 17);
Why jhash2() is not used
of this issue is that newpage cannot be anything but
kernel allocated page that is not swappable.
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mm.h |5 +++
mm/memory.c| 80
2 files changed, 85 insertions(+), 0 deletions
another thread read
and writes to/from the first 512bytes of the page. We can lose
O_DIRECT reads, the very moment we mark any pte wrprotected...
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/rmap.h | 11
mm/rmap.c| 139
.
(users of mmu_notifiers that didnt implement the set_pte_at_notify()
call back will just recive the mmu_notifier_invalidate_page callback)
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mmu_notifier.h | 34 ++
mm/memory.c | 10
be done automatically by the system so it sounded extremely
attractive when Andrea presented it.
I am sending another seires of patchs for kvm kernel and kvm-userspace
that would allow users of kvm to test ksm with it.
The kvm patchs would apply to Avi git tree.
Izik Eidus (4):
MMU_NOTIFIERS: add
of pages to share inside this memory region.
__u32 pad;
__u64 addr:
the begining of the virtual address of this region.
__u64 reserved_bits;
reserved bits for future usage.
KSM_REMOVE_MEMORY_REGION:
Remove memory region from ksm.
Signed-off-by: Izik Eidus iei...@redhat.com
Gerd Hoffmann wrote:
Izik Eidus wrote:
The main problem that ksm will face when removing the fd interface is:
right now when you register memory into ksm, you open fd, and then ksm
do get_task_mm(), we will do mmput when the file will be closed
Did you test whenever it really cleans
Anthony Liguori wrote:
Chris Wright wrote:
* Anthony Liguori (anth...@codemonkey.ws) wrote:
The ioctl() interface is quite bad for what you're doing. You're
telling the kernel extra information about a VA range in
userspace. That's what madvise is for. You're tweaking simple
Chris Wright wrote:
* Anthony Liguori (anth...@codemonkey.ws) wrote:
Using an interface like madvise() would force the issue to be dealt with
properly from the start :-)
Yeah, I'm not at all opposed to it.
This updates to madvise for register and sysfs for control.
madvise issues:
Chris Wright wrote:
* Izik Eidus (iei...@redhat.com) wrote:
Is this what we want?
How about baby steps...
admit that ioctl to control plane is better done via sysfs?
Yes
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord
Jesper Juhl wrote:
Hi,
On Tue, 31 Mar 2009, Izik Eidus wrote:
KSM is a linux driver that allows dynamicly sharing identical memory
pages between one or more processes.
Unlike tradtional page sharing that is made at the allocation of the
memory, ksm do it dynamicly after the memory
KAMEZAWA Hiroyuki wrote:
On Tue, 31 Mar 2009 15:21:53 +0300
Izik Eidus iei...@redhat.com wrote:
kpage is actually what going to be KsmPage - the shared page...
Right now this pages are not swappable..., after ksm will be merged we
will make this pages swappable as well
Anthony Liguori wrote:
Andrea Arcangeli wrote:
On Tue, Mar 31, 2009 at 10:54:57AM -0500, Anthony Liguori wrote:
You can still disable ksm and simply return ENOSYS for the MADV_
flag. You
Anthony, the biggest problem about madvice() is that it is a real system
call api, i wouldnt
KAMEZAWA Hiroyuki wrote:
On Tue, 31 Mar 2009 02:59:20 +0300
Izik Eidus iei...@redhat.com wrote:
Ksm is driver that allow merging identical pages between one or more
applications in way unvisible to the application that use it.
Pages that are merged are marked as readonly and are COWed when
Anthony Liguori wrote:
Izik Eidus wrote:
Ksm is driver that allow merging identical pages between one or more
applications in way unvisible to the application that use it.
Pages that are merged are marked as readonly and are COWed when any
application try to change them.
Ksm is used for cases
Anthony Liguori wrote:
Izik Eidus wrote:
I am sending another seires of patchs for kvm kernel and kvm-userspace
that would allow users of kvm to test ksm with it.
The kvm patchs would apply to Avi git tree.
Any reason to not take these through upstream QEMU instead of
kvm-userspace
of patchs for kvm kernel and kvm-userspace
that would allow users of kvm to test ksm with it.
The kvm patchs would apply to Avi git tree.
Izik Eidus (4):
MMU_NOTIFIERS: add set_pte_at_notify()
add page_wrprotect(): write protecting page.
add replace_page(): change the page pte is pointing
.
(users of mmu_notifiers that didnt implement the set_pte_at_notify()
call back will just recive the mmu_notifier_invalidate_page callback)
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mmu_notifier.h | 34 ++
mm/memory.c | 10
another thread read
and writes to/from the first 512bytes of the page. We can lose
O_DIRECT reads, the very moment we mark any pte wrprotected...
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/rmap.h | 11
mm/rmap.c| 139
of this issue is that newpage cannot be anything but
kernel allocated page that is not swappable.
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/mm.h |5 +++
mm/memory.c| 80
2 files changed, 85 insertions(+), 0 deletions
apply it against Avi git tree.
Izik Eidus (3):
kvm: dont hold pagecount reference for mapped sptes pages.
kvm: add SPTE_HOST_WRITEABLE flag to the shadow ptes.
kvm: add support for change_pte mmu notifiers
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 89
not increase the
mapcount when mapping page into shadow page table entry,
so when comparing pagecount against mapcount, you have no
reliable result.)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/kvm/mmu.c |7 ++-
1 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86
this flag notify that the host physical page we are pointing to from
the spte is write protected, and therefore we cant change its access
to be write unless we run get_user_pages(write = 1).
(this is needed for change_pte support in kvm)
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86
this is needed for kvm if it want ksm to directly map pages into its
shadow page tables.
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 68 +++
virt/kvm/kvm_main.c
Apply it against Avi kvm-userspace git tree.
Izik Eidus (2):
qemu: add ksm support
qemu: add ksmctl.
qemu/ksm.h | 70
qemu/vl.c | 34 +
user/Makefile |6 +++-
user/config
Signed-off-by: Izik Eidus iei...@redhat.com
---
qemu/ksm.h | 70
qemu/vl.c | 34 +
2 files changed, 104 insertions(+), 0 deletions(-)
create mode 100644 qemu/ksm.h
diff --git a/qemu/ksm.h b/qemu/ksm.h
userspace tool to control the ksm kernel thread
Signed-off-by: Izik Eidus iei...@redhat.com
---
user/Makefile |6 +++-
user/config-x86-common.mak |2 +-
user/ksmctl.c | 69
3 files changed, 75 insertions(+), 2
:
__u32 npages;
number of pages to share inside this memory region.
__u32 pad;
__u64 addr:
the begining of the virtual address of this region.
KSM_REMOVE_MEMORY_REGION:
Remove memory region from ksm.
Signed-off-by: Izik Eidus iei...@redhat.com
---
include/linux/ksm.h| 69
Tomasz Chmielewski wrote:
Evert schrieb:
Hi all,
According to the Wikipedia (
http://en.wikipedia.org/wiki/Comparison_of_platform_virtual_machines
) both VirtualBox VMware server support something called 'Live
memory allocation'.
Does KVM support this as well?
What does this term mean
Alexander Graf wrote:
Hi,
On 25.01.2009, at 09:16, Neo Jia wrote:
hi,
I am thinking if it is possible to port KVM to Mac OS (leopard). Is
there anybody doing this already?
I've considered doing it, but haven't gotten around to it, due to lack
of inspiration.
The biggest problem IMHO is
Chris Wright wrote:
* Izik Eidus (iei...@redhat.com) wrote:
This patch make the pci mem region larger (1 giga now).
this is needed for pci devices that require large amount of memory
such as video cards.
for pea guests this patch is not an issue beacuse the guest OS will map
the rest
kind of simple, i would send one to qemu later (need to check something
first
Spice need this, it allow more memory cache (badly needed when runing
with multiple screens)
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord...@vger.kernel.org
More
the maximum memory that would be
avaible now is 3giga.
Signed-off-by: Izik Eidus iei...@redhat.com
---
bios/acpi-dsdt.dsl |2 +-
bios/rombios.c |2 +-
bios/rombios32.c| 10 +-
qemu/hw/pc.c|6 +++---
qemu/hw/vga_int.h
Remove the vmap usage from kvm, this is needed both for ksm and
get_user_pages != write.
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
This commit change the name of emulator_read_std into kvm_read_guest_virt,
and add new function name kvm_write_guest_virt that allow writing into a
guest virtual address.
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/include/asm/kvm_host.h |4 ---
arch/x86/kvm/x86.c
1 - 100 of 135 matches
Mail list logo
