sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
The VIRTIO_BALLOON_F_PAGE_POISON feature bit is used to indicate if the
guest is using page poisoning. Guest writes to the poison_val config
field to tell host about the page poisoning value in use.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@r
In some usages, e.g. virtio-balloon, a kernel module needs to know if
page poisoning is in use. This patch exposes the page_poisoning_enabled
function to kernel modules.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Micha
On 04/09/2018 02:03 PM, Michael S. Tsirkin wrote:
On Fri, Apr 06, 2018 at 08:17:23PM +0800, Wei Wang wrote:
Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the
support of reporting hints of guest free pages to host via virtio-balloon.
Host requests the guest to report free
In some usages, e.g. virtio-balloon, a kernel module needs to know if
page poisoning is in use. This patch exposes the page_poisoning_enabled
function to kernel modules.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Micha
The VIRTIO_BALLOON_F_PAGE_POISON feature bit is used to indicate if the
guest is using page poisoning. Guest writes to the poison_val config
field to tell host about the page poisoning value in use.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@r
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org&
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
ss this flag check later;
- init_vqs: change to put some variables on stack to have simpler
implementation;
- add destroy_workqueue(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, plea
On 04/04/2018 02:47 AM, Michael S. Tsirkin wrote:
On Wed, Apr 04, 2018 at 12:10:03AM +0800, Wei Wang wrote:
+static int add_one_sg(struct virtqueue *vq, unsigned long pfn, uint32_t len)
+{
+ struct scatterlist sg;
+ unsigned int unused;
+
+ sg_init_table(, 1
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
The VIRTIO_BALLOON_F_PAGE_POISON feature bit is used to indicate if the
guest is using page poisoning. Guest writes to the poison_val config
field to tell host about the page poisoning value in use.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@r
In some usages, e.g. virtio-balloon, a kernel module needs to know if
page poisoning is in use. This patch exposes the page_poisoning_enabled
function to kernel modules.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Micha
t_vqs: change to put some variables on stack to have simpler
implementation;
- add destroy_workqueue(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https:/
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org&
On 03/27/2018 05:22 AM, Andrew Morton wrote:
On Mon, 26 Mar 2018 10:39:51 +0800 Wei Wang <wei.w.w...@intel.com> wrote:
This patch adds support to walk through the free page blocks in the
system and report them via a callback function. Some page blocks may
leave the free list after zone
The VIRTIO_BALLOON_F_PAGE_POISON feature bit is used to indicate if the
guest is using page poisoning. Guest writes to the poison_val config
field to tell host about the page poisoning value in use.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@r
In some usages, e.g. virtio-balloon, a kernel module needs to know if
page poisoning is in use. This patch exposes the page_poisoning_enabled
function to kernel modules.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Micha
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
tion;
- add destroy_workqueue(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https://lwn.net/Articles/743660/
Wei Wang (4):
mm: support reporting free page blocks
On 02/13/2018 06:16 PM, Michal Hocko wrote:
On Fri 09-02-18 16:08:14, Wei Wang wrote:
The PAGE_POISON macro is used in page_poison.c only, so avoid exporting
it. Also remove the "mm/debug-pagealloc.c" related comment, which is
obsolete.
Why is this an improvement? I thought the w
On 02/09/2018 11:14 AM, Michael S. Tsirkin wrote:
On Fri, Feb 09, 2018 at 11:11:39AM +0800, Wei Wang wrote:
On 02/09/2018 03:55 AM, Michael S. Tsirkin wrote:
On Thu, Feb 08, 2018 at 05:50:16PM +0800, Wei Wang wrote:
Details:
Set up a Ping-Pong local live migration, where the guest ceaselessy
The PAGE_POISON macro is used in page_poison.c only, so avoid exporting
it. Also remove the "mm/debug-pagealloc.c" related comment, which is
obsolete.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Michal Hocko <mho...@
On 02/09/2018 03:55 AM, Michael S. Tsirkin wrote:
On Thu, Feb 08, 2018 at 05:50:16PM +0800, Wei Wang wrote:
Details:
Set up a Ping-Pong local live migration, where the guest ceaselessy
migrates between the source and destination. Linux compilation,
i.e. make bzImage -j4, is performed during
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
The VIRTIO_BALLOON_F_PAGE_POISON feature bit is used to indicate if the
guest is using page poisoning. Guest writes to the poison_val config
field to tell host about the page poisoning value in use.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@r
Move the PAGE_POISON value to page_poison.c and add a function to enable
callers from a kernel module to get the poison value if the page poisoning
feature is in use. This also avoids callers directly checking PAGE_POISON
regardless of whether the feature is enabled.
Signed-off-by: Wei Wang
t;balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https://lwn.net/Articles/743660/
Wei Wang (4):
mm: support reporting free page blocks
virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT
mm/p
On 02/08/2018 02:34 AM, Michael S. Tsirkin wrote:
On Wed, Feb 07, 2018 at 02:54:30PM +0800, Wei Wang wrote:
In some usages, e.g. virtio-balloon, a kernel module needs to know if
page poisoning is in use. This patch exposes the page_poisoning_enabled
function to kernel modules.
Signed-off
On 02/07/2018 12:34 PM, Michael S. Tsirkin wrote:
On Wed, Feb 07, 2018 at 11:01:06AM +0800, Wei Wang wrote:
Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the
support of reporting hints of guest free pages to host via virtio-balloon.
Host requests the guest to report free
The VIRTIO_BALLOON_F_PAGE_POISON feature bit is used to indicate if the
guest is using page poisoning. Guest writes to the poison_val config
field to tell host about the page poisoning value in use.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@r
In some usages, e.g. virtio-balloon, a kernel module needs to know if
page poisoning is in use. This patch exposes the page_poisoning_enabled
function to kernel modules.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Micha
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
iscuss this flag check later;
- init_vqs: change to put some variables on stack to have simpler
implementation;
- add destroy_workqueue(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
On 02/07/2018 09:26 AM, kbuild test robot wrote:
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
head: 96bcd04462b99e2c80e09f6537770a0ca6b288d0
commit: 96bcd04462b99e2c80e09f6537770a0ca6b288d0 [20/20] virtio-balloon:
VIRTIO_BALLOON_F_FREE_PAGE_HINT
config:
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
sending the starting cmd id, so the guest doesn't need to
kick after filling an element to the vq.
Host may also requests the guest to stop the reporting in advance by
sending the stop cmd id to the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Sign
(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https://lwn.net/Articles/743660/
Wei Wang (2):
mm: support reporting free page blocks
virtio-balloon
On 02/02/2018 03:15 AM, Michael S. Tsirkin wrote:
On Thu, Jan 25, 2018 at 05:14:04PM +0800, Wei Wang wrote:
This patch series is separated from the previous "Virtio-balloon
Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT,
implemented by this series enables
On 01/31/2018 07:44 AM, Michael S. Tsirkin wrote:
On Fri, Jan 26, 2018 at 11:31:19AM +0800, Wei Wang wrote:
On 01/26/2018 10:42 AM, Michael S. Tsirkin wrote:
On Fri, Jan 26, 2018 at 09:40:44AM +0800, Wei Wang wrote:
On 01/25/2018 09:49 PM, Michael S. Tsirkin wrote:
On Thu, Jan 25, 2018 at 05
On 01/26/2018 10:42 AM, Michael S. Tsirkin wrote:
On Fri, Jan 26, 2018 at 09:40:44AM +0800, Wei Wang wrote:
On 01/25/2018 09:49 PM, Michael S. Tsirkin wrote:
On Thu, Jan 25, 2018 at 05:14:06PM +0800, Wei Wang wrote:
The controversy is that the free list is not static
once the lock
On 01/25/2018 09:41 PM, Michael S. Tsirkin wrote:
On Wed, Jan 24, 2018 at 06:42:41PM +0800, Wei Wang wrote:
This patch adds support to walk through the free page blocks in the
system and report them via a callback function. Some page blocks may
leave the free list after zone->lock is relea
On 01/26/2018 06:41 AM, Andrew Morton wrote:
On Thu, 25 Jan 2018 17:38:27 +0800 Wei Wang <wei.w.w...@intel.com> wrote:
This patch adds support to walk through the free page blocks in the
system and report them via a callback function. Some page blocks may
leave the free list after zone
On 01/25/2018 07:28 PM, Tetsuo Handa wrote:
On 2018/01/25 12:32, Wei Wang wrote:
On 01/25/2018 01:15 AM, Michael S. Tsirkin wrote:
On Wed, Jan 24, 2018 at 06:42:42PM +0800, Wei Wang wrote:
+
+static void report_free_page_func(struct work_struct *work)
+{
+struct virtio_balloon *vb
Hi Michal,
On 01/25/2018 05:38 PM, Wei Wang wrote:
This patch adds support to walk through the free page blocks in the
system and report them via a callback function. Some page blocks may
leave the free list after zone->lock is released, so it is the caller's
responsibility to either det
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
On 01/25/2018 01:15 AM, Michael S. Tsirkin wrote:
On Wed, Jan 24, 2018 at 06:42:42PM +0800, Wei Wang wrote:
What is this doing? Basically handling the case where vq is broken?
It's kind of ugly to tweak feature bits, most code assumes they never
change. Please just return an error
implementation;
- add destroy_workqueue(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https://lwn.net/Articles/743660/
Wei Wang (2):
mm: support reporting free page
the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Michal Hocko <mho...@kernel.org
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
On 01/25/2018 01:15 AM, Michael S. Tsirkin wrote:
On Wed, Jan 24, 2018 at 06:42:42PM +0800, Wei Wang wrote:
+
+static void report_free_page_func(struct work_struct *work)
+{
+ struct virtio_balloon *vb;
+ unsigned long flags;
+
+ vb = container_of(work, struct virtio_balloon
On 01/24/2018 12:29 PM, Michael S. Tsirkin wrote:
On Mon, Jan 22, 2018 at 07:25:45PM +0800, Wei Wang wrote:
On 01/19/2018 08:39 PM, Michael S. Tsirkin wrote:
On Fri, Jan 19, 2018 at 11:44:21AM +0800, Wei Wang wrote:
On 01/18/2018 12:44 AM, Michael S. Tsirkin wrote:
On Wed, Jan 17, 2018 at 01
the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Michal Hocko <mho...@kernel.org
to have simpler
implementation;
- add destroy_workqueue(vb->balloon_wq);
v21->v22:
- add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https://lwn.net/Articles/743660/
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
On 01/24/2018 01:01 PM, Michael S. Tsirkin wrote:
On Wed, Jan 24, 2018 at 10:50:27AM +0800, Wei Wang wrote:
This will not DTRT in all cases. It's quite possible
that host does not need the kick when ring is half full but
does need it later when ring is full.
You can kick at ring half full
On 01/22/2018 07:25 PM, Wei Wang wrote:
On 01/19/2018 08:39 PM, Michael S. Tsirkin wrote:
On Fri, Jan 19, 2018 at 11:44:21AM +0800, Wei Wang wrote:
On 01/18/2018 12:44 AM, Michael S. Tsirkin wrote:
On Wed, Jan 17, 2018 at 01:10:11PM +0800, Wei Wang wrote:
+vb->start_cmd_id = cmd
the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Michal Hocko <mho...@kernel.org
add_one_sg: some code and comment re-arrangement
- send_cmd_id: handle a cornercase
For previous ChangeLog, please reference
https://lwn.net/Articles/743660/
Wei Wang (2):
mm: support reporting free page blocks
virtio-balloon: VIRTIO_BALLOON_F_FREE_PA
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
On 01/19/2018 08:39 PM, Michael S. Tsirkin wrote:
On Fri, Jan 19, 2018 at 11:44:21AM +0800, Wei Wang wrote:
On 01/18/2018 12:44 AM, Michael S. Tsirkin wrote:
On Wed, Jan 17, 2018 at 01:10:11PM +0800, Wei Wang wrote:
+ vb->start_cmd_id = cmd_id;
+ queue_work
On 01/18/2018 12:44 AM, Michael S. Tsirkin wrote:
On Wed, Jan 17, 2018 at 01:10:11PM +0800, Wei Wang wrote:
+static void virtballoon_changed(struct virtio_device *vdev)
+{
+ struct virtio_balloon *vb = vdev->priv;
+ unsigned long flags;
+ __u32 cmd_id;
+ s64 d
On 01/18/2018 12:44 AM, Michael S. Tsirkin wrote:
On Wed, Jan 17, 2018 at 01:10:11PM +0800, Wei Wang wrote:
+{
+ struct scatterlist sg;
+ unsigned int unused;
+ int err;
+
+ sg_init_one(, addr, sizeof(uint32_t));
This passes a guest-endian value to host
. Host may also requests
the guest to stop the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc:
adds a config field, poison_val. Guest writes to the config
field to tell the host about the poisoning value. The value will be 0 in
the following cases:
1) PAGE_POISONING_NO_SANITY is enabled;
2) page poisoning is disabled; or
3) PAGE_POISONING_ZERO is enabled.
Signed-off-by: Wei Wang <wei.
the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Michal Hocko <mho...@kernel.org
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
nd comment re-arrangement
- send_cmd_id: handle a cornercase
For precious ChangeLog, please reference
https://lwn.net/Articles/743660/
Wei Wang (3):
mm: support reporting free page blocks
virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_VQ
virtio-balloon: don't report free pages when page
On 01/11/2018 07:06 PM, Tetsuo Handa wrote:
Wei Wang wrote:
Michael, could we merge patch 3-5 first?
No! I'm repeatedly asking you to propose only VIRTIO_BALLOON_F_SG changes.
Please don't ignore me.
Patch 4 depends on patch 2. Thus, back to patch 2.
There is not strict dependence per se
On 01/09/2018 10:42 PM, Tetsuo Handa wrote:
Wei Wang wrote:
- enable OOM to free inflated pages maintained in the local temporary
list.
I do want to see it before applying this patch.
Fine, then what do you think of the method I shared in your post here:
https://patchwork.kernel.org
OOM to free inflated pages maintained in the local temporary
list.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@redhat.com>
Cc: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp
adds a config field, poison_val. Guest writes to the config
field to tell the host about the poisoning value. The value will be 0 in
the following cases:
1) PAGE_POISONING_NO_SANITY is enabled;
2) page poisoning is disabled; or
3) PAGE_POISONING_ZERO is enabled.
Signed-off-by: Wei Wang <wei.
the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Michal Hocko <mho...@kernel.org
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
e-write the virtio-balloon implementation patch.
3) commit changes
4) patch re-org
Matthew Wilcox (1):
xbitmap: Introduce xbitmap
Wei Wang (4):
virtio-balloon: VIRTIO_BALLOON_F_SG
mm: support reporting free page blocks
virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_VQ
virtio-balloo
OOM to free inflated pages maintained in the local temporary
list.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@redhat.com>
Cc: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp
From: Matthew Wilcox <mawil...@microsoft.com>
The eXtensible Bitmap is a sparse bitmap representation which is
efficient for set bits which tend to cluster. It supports up to
'unsigned long' worth of bits.
Signed-off-by: Matthew Wilcox <mawil...@microsoft.com>
Signed-off-by: Wei W
On 01/03/2018 10:29 AM, Tetsuo Handa wrote:
Matthew Wilcox wrote:
The radix tree convention is objectively awful, which is why I'm working
to change it. Specifying the GFP flags at radix tree initialisation time
rather than allocation time leads to all kinds of confusion. The preload
API is a
On 01/02/2018 10:09 PM, Matthew Wilcox wrote:
On Fri, Dec 22, 2017 at 04:49:11PM +0800, Wei Wang wrote:
Thanks for the improvement. I also found a small bug in xb_zero. With the
following changes, it has passed the current test cases and tested with the
virtio-balloon usage without any issue
On 12/26/2017 06:38 PM, Tetsuo Handa wrote:
Wei Wang wrote:
On 12/25/2017 10:51 PM, Tetsuo Handa wrote:
Wei Wang wrote:
What we are doing here is to free the pages that were just allocated in
this round of inflating. Next round will be sometime later when the
balloon work item gets its turn
On 12/24/2017 03:42 PM, Wei Wang wrote:
On 12/24/2017 12:45 PM, Tetsuo Handa wrote:
Matthew Wilcox wrote:
+unsigned long pfn = page_to_pfn(page);
+int ret;
+
+*pfn_min = min(pfn, *pfn_min);
+*pfn_max = max(pfn, *pfn_max);
+
+do {
+if (xb_preload(GFP_NOWAIT
On 12/24/2017 12:45 PM, Tetsuo Handa wrote:
Matthew Wilcox wrote:
+ unsigned long pfn = page_to_pfn(page);
+ int ret;
+
+ *pfn_min = min(pfn, *pfn_min);
+ *pfn_max = max(pfn, *pfn_max);
+
+ do {
+ if (xb_preload(GFP_NOWAIT | __GFP_NOWARN) < 0)
+
On 12/23/2017 10:33 PM, Tetsuo Handa wrote:
+ bitmap = rcu_dereference_raw(*slot);
+ if (!bitmap) {
+ bitmap = this_cpu_xchg(ida_bitmap, NULL);
+ if (!bitmap)
+ return -ENOMEM;
I can't understand this. I can understand if it were
On 12/22/2017 05:03 AM, Matthew Wilcox wrote:
OK, here's a rewrite of xbitmap.
Compared to the version you sent:
- xb_find_set() is the rewrite I sent out yesterday.
- xb_find_clear() is a new implementation. I use the IDR_FREE tag to find
clear bits. This led to me finding a bug in
On 12/21/2017 10:37 PM, Tetsuo Handa wrote:
Matthew Wilcox wrote:
+/**
+ * xb_find_set - find the next set bit in a range of bits
+ * @xb: the xbitmap to search from
+ * @offset: the offset in the range to start searching
+ * @size: the size of the range
+ *
+ * Returns: the found bit or, @size
On 12/21/2017 01:10 AM, Matthew Wilcox wrote:
On Wed, Dec 20, 2017 at 04:13:16PM +, Wang, Wei W wrote:
On Wednesday, December 20, 2017 8:26 PM, Matthew Wilcox wrote:
unsigned long bit;
xb_preload(GFP_KERNEL);
xb_set_bit(xb, 700);
xb_preload_end();
On 12/19/2017 10:05 PM, Tetsuo Handa wrote:
Wei Wang wrote:
ChangeLog:
v19->v20:
1) patch 1: xbitmap
- add __rcu to "void **slot";
- remove the exceptional path.
2) patch 3: xbitmap
- DeveloperNotes: add an item to comment that the current bit range
adds a config field, poison_val. Guest writes to the config
field to tell the host about the poisoning value. The value will be 0 in
the following cases:
1) PAGE_POISONING_NO_SANITY is enabled;
2) page poisoning is disabled; or
3) PAGE_POISONING_ZERO is enabled.
Signed-off-by: Wei Wang <wei.
the reporting in advance by sending the stop cmd id to
the guest via the configuration register.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Michal Hocko <mho...@kernel.org
ges but are written after the report function
returns will be captured by the hypervisor, and they will be added to the
next round of memory transfer.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Cc: Michal Hocko <mho...@kernel.org>
C
to help searching.
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Matthew Wilcox <mawil...@microsoft.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Michal Hocko <mho...@kernel.org>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Tetsuo Handa <penguin-ker.
-by: Wei Wang <wei.w.w...@intel.com>
Signed-off-by: Liang Li <liang.z...@intel.com>
Suggested-by: Michael S. Tsirkin <m...@redhat.com>
Cc: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
---
drivers/virtio/virtio_balloon.c | 234
st_bit().
Signed-off-by: Wei Wang <wei.w.w...@intel.com>
Cc: Matthew Wilcox <mawil...@microsoft.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Michal Hocko <mho...@kernel.org>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Tetsuo Handa <penguin-ker...@i-love.sakura
e-write the virtio-balloon implementation patch.
3) commit changes
4) patch re-org
Matthew Wilcox (1):
xbitmap: Introduce xbitmap
Wei Wang (6):
xbitmap: potential improvement
xbitmap: add more operations
virtio-balloon: VIRTIO_BALLOON_F_SG
mm: support reporting free page blocks
virtio-ba
there, this will be a problem when inserting a node to
the tree later. This patch moves __radix_tree_preload() after kmalloc()
and returns a boolean to indicate the success or failure. Also, add the
__must_check annotation to xb_preload for prudence purpose.
Signed-off-by: Wei Wang <wei.w.w...@intel.com&
On 12/17/2017 11:16 PM, Tetsuo Handa wrote:
Wang, Wei W wrote:
Wei Wang wrote:
But passing GFP_NOWAIT means that we can handle allocation failure.
There is no need to use preload approach when we can handle allocation failure.
I think the reason we need xb_preload is because radix tree
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