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
Hi,
The following seires add ksm support to the kvm mmu.
Thanks.
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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
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
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
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
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
ציטוט Arn:
If I use the kernel function get_user_pages() within a guest
kernel module, will this ensure that the guests pages are never
swapped out by the host ? Will it lock these pages in memory ?
(Has anyone tried this ? )
As Izik said, the answer is no. Is this the desirable outcome,
ציטוט Sukanto Ghosh:
Can anyone answer these queries regarding KSM ?
How does KSM offers its services through the /dev/ksm device ?
ioctls
Are every guest pages scanned in KVM while using KSM or page-scanning
and sharing is triggered on some event (low memory, etc) ?
no, the scanning
ציטוט Sukanto Ghosh:
Doesn't KSM notifies KVM about the shared pages so that KVM can update
its sptes accordingly or is it done by KSM itself ?
when using kvm, mmu notifiers is a must for ksm, (mmu notifiers update kvm
about the changes in the host page table)
What about KSM
ציטוט Sukanto Ghosh:
One more query, what if multiple processes call ioctl KSM_CREATE_SCAN
? Will there be multiple scanners ?
yes
Consider a scenario where two processes A B separately call
KSM_CREATE_SCAN and then start registering some memory pages/areas via
that treated as not aliased.
Signed-off-by: Izik Eidus [EMAIL PROTECTED]
---
arch/ia64/include/asm/kvm_host.h |1 +
arch/ia64/kvm/kvm-ia64.c |5 --
arch/s390/include/asm/kvm_host.h |1 +
arch/s390/kvm/kvm-s390.c |5 --
arch/x86/kvm/mmu.c |5 +--
arch/x86
Marcelo Tosatti wrote:
Hi Izik,
On Thu, Sep 04, 2008 at 05:13:20PM +0300, izik eidus wrote:
+ struct kvm_memory_slot *alias_slot = kvm-memslots[i];
+
+ if (alias_slot-base_gfn == slot-base_gfn)
+ return 1;
+ }
+ return 0
Marcelo Tosatti wrote:
Hi Izik,
On Thu, Sep 04, 2008 at 05:13:20PM +0300, izik eidus wrote:
+struct kvm_memory_slot *alias_slot = kvm-memslots[i];
+
+if (alias_slot-base_gfn == slot-base_gfn)
+return 1;
+}
+return 0;
+}
+
+static void update_alias_slots
i have sent patch that remove the aliasing and i will resend it again
but untill then this patch should be applied as it fix kernel panic.
From 61a13744e2367572f3e27ab5c0cce6e080e94d67 Mon Sep 17 00:00:00 2001
From: Izik Eidus [EMAIL PROTECTED]
Date: Fri, 3 Oct 2008 17:40:32 +0300
Subject: [PATCH
Avi Kivity wrote:
LRU typically makes fairly bad decisions since it throws most of the
information it has away. I recommend looking up LRU-K and similar
algorithms, just to get a feel for this; it is basically the simplest
possible algorithm short of random selection.
Note that Linux doesn't
Andrew Morton wrote:
On Tue, 11 Nov 2008 15:21:37 +0200 Izik Eidus [EMAIL PROTECTED] 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
Avi Kivity wrote:
Andrew Morton wrote:
The whole approach seems wrong to me. The kernel lost track of these
pages and then we run around post-facto trying to fix that up again.
Please explain (for the changelog) why the kernel cannot get this right
via the usual sharing, refcounting and
Andrew Morton wrote:
On Tue, 11 Nov 2008 20:48:16 +0200
Avi Kivity [EMAIL PROTECTED] wrote:
Andrew Morton wrote:
The whole approach seems wrong to me. The kernel lost track of these
pages and then we run around post-facto trying to fix that up again.
Please explain (for the
From: Izik Eidus [EMAIL PROTECTED]
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 working by walking over
From: Izik Eidus [EMAIL PROTECTED]
this function is needed in cases you want to change the userspace
virtual mapping into diffrent physical page,
KSM need this for merging the identical pages.
this function is working by removing the oldpage from the rmap and
calling put_page
From: Izik Eidus [EMAIL PROTECTED]
this function is optimzation for kvm/users of mmu_notifiers for COW
pages, it is useful for kvm when ksm is used beacuse it allow kvm
not to have to recive VMEXIT and only then map the shared page into
the mmu shadow pages, but instead map it directly
Andrew Morton wrote:
On Tue, 11 Nov 2008 15:21:39 +0200
Izik Eidus [EMAIL PROTECTED] wrote:
From: Izik Eidus [EMAIL PROTECTED]
this function is needed in cases you want to change the userspace
virtual mapping into diffrent physical page,
Not sure that I understand that description
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 was created.
Memory is periodically scanned; identical pages are identified
Christoph Lameter wrote:
page migration as far as i saw cant migrate anonymous page into kernel page.
if you want we can change page_migration to do that, but i thought you will
rather have ksm changes separate.
What do you mean by kernel page? The kernel can allocate a page and then
Christoph Lameter wrote:
Currently page migration assumes that the page will continue to be part
of the existing file or anon vma.
exactly, and ksm really need it to get out of the existing anon vma!
What you want sounds like assigning a swap pte to an anonymous page? That
way a anon
Christoph Lameter wrote:
On Tue, 11 Nov 2008, Avi Kivity wrote:
Christoph Lameter wrote:
page migration requires the page to be on the LRU. That could be changed
if you have a different means of isolating a page from its page tables.
Isn't rmap the means of isolating a page
Jonathan Corbet wrote:
I don't claim to begin to really understand the deep VM side of this
patch, but I can certainly pick nits as I work through it...sorry for
the lack of anything more substantive.
+static struct list_head slots;
Some of these file-static variable names seem a
Jonathan Corbet wrote:
On Wed, 12 Nov 2008 00:17:39 +0200
Izik Eidus [EMAIL PROTECTED] wrote:
+static int ksm_dev_open(struct inode *inode, struct file *filp)
+{
+ try_module_get(THIS_MODULE);
+ return 0;
+}
+
+static int ksm_dev_release(struct inode *inode, struct file *filp
Jonathan Corbet wrote:
[Let's see if I can get through the rest without premature sends...]
On Wed, 12 Nov 2008 00:17:39 +0200
Izik Eidus [EMAIL PROTECTED] wrote:
Actually, it occurs to me that there's no sanity checks on any of
the values passed in by ioctl(). What happens if the user
Jonathan Corbet wrote:
What about things like cache effects from scanning all those pages? My
guess is that, if you're trying to run dozens of Windows guests, cache
usage is not at the top of your list of concerns, but I could be
wrong. Usually am...
Ok, ksm does make the cache of the
Avi Kivity wrote:
KAMEZAWA Hiroyuki wrote:
Can I make a question ? (I'm working for memory cgroup.)
Now, we do charge to anonymous page when
- charge(+1) when it's mapped firstly (mapcount 0-1)
- uncharge(-1) it's fully unmapped (mapcount 1-0) vir
page_remove_rmap().
My quesion is
-
ציטוט KAMEZAWA Hiroyuki:
Thank you for answers.
On Wed, 12 Nov 2008 13:11:12 +0200
Izik Eidus [EMAIL PROTECTED] wrote:
Avi Kivity wrote:
KAMEZAWA Hiroyuki wrote:
Can I make a question ? (I'm working for memory cgroup.)
Now, we do charge to anonymous page when
- charge(+1
(From v1 to v2 the main change is much more documentation)
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 was created.
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 [EMAIL PROTECTED]
---
include/linux/rmap.h | 11
mm/rmap.c| 129
of this issue is that newpage cannot be anything but
kernel allocated page that is not swappable.
Signed-off-by: Izik Eidus [EMAIL PROTECTED]
---
include/linux/mm.h |5 +++
mm/memory.c| 80
2 files changed, 85 insertions(+), 0 deletions
of scanning
(so even if there are still more pages to scan,
we stop this iteration)
__u32 flags:
flags to control ksm scaning (right now just
ksm_control_flags_run
available)
Signed-off-by: Izik Eidus
.
(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 [EMAIL PROTECTED]
---
arch/x86/include/asm/kvm_host.h |1 +
arch/x86/kvm/mmu.c | 55
ציטוט Ryota OZAKI:
Hi Izik,
I've tried your patch set, but ksm doesn't work in my machine.
I compiled linux patched with the four patches and configured with KSM
and KVM enabled. After boot with the linux, I run two VMs running linux
using QEMU with a patch in your mail and started KSM scanner
ציטוט Izik Eidus:
ציטוט Ryota OZAKI:
Hi Izik,
I've tried your patch set, but ksm doesn't work in my machine.
I compiled linux patched with the four patches and configured with KSM
and KVM enabled. After boot with the linux, I run two VMs running linux
using QEMU with a patch in your mail
Remove the vmap usage from kvm, this is needed both for ksm and
get_user_pages != write.
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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
Signed-off-by: Izik Eidus iei...@redhat.com
---
arch/x86/kvm/x86.c| 62 +---
include/linux/kvm_types.h |3 +-
2 files changed, 14 insertions(+), 51 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c812209..29df564
Izik Eidus wrote:
Remove the vmap usage from kvm, this is needed both for ksm and
get_user_pages != write.
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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
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
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
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)
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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
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
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
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
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
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
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
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
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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
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
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
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
.
(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
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
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
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
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