On Tue, Aug 14, 2012 at 05:00:49PM -0300, Rafael Aquini wrote:
> On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
> > > > > +/* __isolate_lru_page() counterpart for a ballooned page */
> > > > > +bool isolate_balloon_page(struct page *page)
> > > > > +{
> > > > > + if
On Tue, Aug 14, 2012 at 05:00:49PM -0300, Rafael Aquini wrote:
On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
+/* __isolate_lru_page() counterpart for a ballooned page */
+bool isolate_balloon_page(struct page *page)
+{
+ if
On Tue, Aug 14, 2012 at 05:00:49PM -0300, Rafael Aquini wrote:
> On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
> > > > > +/* __isolate_lru_page() counterpart for a ballooned page */
> > > > > +bool isolate_balloon_page(struct page *page)
> > > > > +{
> > > > > + if
On Tue, Aug 14, 2012 at 10:48:37PM +0300, Michael S. Tsirkin wrote:
> >
> > E.g. kvm can emulate hyperv so it could in theory have hyperv balloon.
> > This is mm stuff it is best not to tie it to specific drivers.
>
> But of course I agree this is not top priority, no need
> to block submission
On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
> > > > +/* __isolate_lru_page() counterpart for a ballooned page */
> > > > +bool isolate_balloon_page(struct page *page)
> > > > +{
> > > > + if (WARN_ON(!movable_balloon_page(page)))
> > >
> > > Looks like this actually
On Tue, Aug 14, 2012 at 02:44:05PM -0300, Rafael Aquini wrote:
> On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
> > > +static inline bool movable_balloon_page(struct page *page)
> > > +{
> > > + return (page->mapping && page->mapping == balloon_mapping);
> >
> > I am guessing
On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
> On Tue, Aug 14, 2012 at 02:44:05PM -0300, Rafael Aquini wrote:
> > On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
> > > > +static inline bool movable_balloon_page(struct page *page)
> > > > +{
> > > > +
On Tue, Aug 14, 2012 at 02:44:05PM -0300, Rafael Aquini wrote:
> On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
> > > +static inline bool movable_balloon_page(struct page *page)
> > > +{
> > > + return (page->mapping && page->mapping == balloon_mapping);
> >
> > I am guessing
On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
> > +static inline bool movable_balloon_page(struct page *page)
> > +{
> > + return (page->mapping && page->mapping == balloon_mapping);
>
> I am guessing this needs smp_read_barrier_depends, and maybe
> ACCESS_ONCE ...
>
I'm
On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
+static inline bool movable_balloon_page(struct page *page)
+{
+ return (page-mapping page-mapping == balloon_mapping);
I am guessing this needs smp_read_barrier_depends, and maybe
ACCESS_ONCE ...
I'm curious about
On Tue, Aug 14, 2012 at 02:44:05PM -0300, Rafael Aquini wrote:
On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
+static inline bool movable_balloon_page(struct page *page)
+{
+ return (page-mapping page-mapping == balloon_mapping);
I am guessing this needs
On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
On Tue, Aug 14, 2012 at 02:44:05PM -0300, Rafael Aquini wrote:
On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
+static inline bool movable_balloon_page(struct page *page)
+{
+ return
On Tue, Aug 14, 2012 at 02:44:05PM -0300, Rafael Aquini wrote:
On Mon, Aug 13, 2012 at 11:26:19AM +0300, Michael S. Tsirkin wrote:
+static inline bool movable_balloon_page(struct page *page)
+{
+ return (page-mapping page-mapping == balloon_mapping);
I am guessing this needs
On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
+/* __isolate_lru_page() counterpart for a ballooned page */
+bool isolate_balloon_page(struct page *page)
+{
+ if (WARN_ON(!movable_balloon_page(page)))
Looks like this actually can happen if the page
On Tue, Aug 14, 2012 at 10:48:37PM +0300, Michael S. Tsirkin wrote:
E.g. kvm can emulate hyperv so it could in theory have hyperv balloon.
This is mm stuff it is best not to tie it to specific drivers.
But of course I agree this is not top priority, no need
to block submission on this,
On Tue, Aug 14, 2012 at 05:00:49PM -0300, Rafael Aquini wrote:
On Tue, Aug 14, 2012 at 10:35:25PM +0300, Michael S. Tsirkin wrote:
+/* __isolate_lru_page() counterpart for a ballooned page */
+bool isolate_balloon_page(struct page *page)
+{
+ if
On Fri, Aug 10, 2012 at 02:55:14PM -0300, Rafael Aquini wrote:
> Memory fragmentation introduced by ballooning might reduce significantly
> the number of 2MB contiguous memory blocks that can be used within a guest,
> thus imposing performance penalties associated with the reduced number of
>
On Fri, Aug 10, 2012 at 02:55:14PM -0300, Rafael Aquini wrote:
Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a guest,
thus imposing performance penalties associated with the reduced number of
On Fri, Aug 10, 2012 at 02:55:14PM -0300, Rafael Aquini wrote:
> Memory fragmentation introduced by ballooning might reduce significantly
> the number of 2MB contiguous memory blocks that can be used within a guest,
> thus imposing performance penalties associated with the reduced number of
>
On Fri, Aug 10, 2012 at 02:55:14PM -0300, Rafael Aquini wrote:
Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a guest,
thus imposing performance penalties associated with the reduced number of
Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a guest,
thus imposing performance penalties associated with the reduced number of
transparent huge pages that could be used by the guest workload.
This
Memory fragmentation introduced by ballooning might reduce significantly
the number of 2MB contiguous memory blocks that can be used within a guest,
thus imposing performance penalties associated with the reduced number of
transparent huge pages that could be used by the guest workload.
This
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