Wei Wang wrote:
> 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
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
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 pretty awful workaround, and it will go
On Sun, Dec 24, 2017 at 03:42:02PM +0800, Wei Wang wrote:
> On 12/24/2017 12:45 PM, Tetsuo Handa wrote:
> > Matthew Wilcox wrote:
> > > If you can't preload with anything better than that, I think that
> > > xb_set_bit() should attempt an allocation with GFP_NOWAIT | __GFP_NOWARN,
> > > and then yo
Wei Wang wrote:
> 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
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 t
Wei Wang wrote:
> On 12/25/2017 10:51 PM, Tetsuo Handa wrote:
> > Wei Wang wrote:
> >> @@ -173,8 +292,15 @@ static unsigned fill_balloon(struct
> >> virtio_balloon *vb, size_t num)
> >> while ((page = balloon_page_pop(&pages))) {
> >>balloon_page_enqueue(&vb->vb
On 12/25/2017 10:51 PM, Tetsuo Handa wrote:
Wei Wang wrote:
@@ -173,8 +292,15 @@ static unsigned fill_balloon(struct
virtio_balloon *vb, size_t num)
while ((page = balloon_page_pop(&pages))) {
balloon_page_enqueue(&vb->vb_dev_info, page);
+if (use_sg) {
+i
Wei Wang wrote:
> @@ -173,8 +292,15 @@ static unsigned fill_balloon(struct
> virtio_balloon *vb, size_t num)
> while ((page = balloon_page_pop(&pages))) {
> balloon_page_enqueue(&vb->vb_dev_info, page);
> +if (use_sg) {
> +if (xb_
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 | __GFP_NO
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)
+
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)
> > + return -ENOMEM;
> > +
>
On Tue, Dec 19, 2017 at 08:17:56PM +0800, Wei Wang wrote:
> +/*
> + * Send balloon pages in sgs to host. The balloon pages are recorded in the
> + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE.
> + * The page xbitmap is searched for continuous "1" bits, which correspond
Add a new feature, VIRTIO_BALLOON_F_SG, which enables the transfer of
balloon (i.e. inflated/deflated) pages using scatter-gather lists to the
host.
The implementation of the previous virtio-balloon is not very efficient,
because the balloon pages are transferred to the host by one array each
time
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