Messages in this thread Patch in this message | | | Date | Tue, 15 Mar 2011 15:18:37 +0100 | From | Daniel Kiper <> | Subject | Re: [PATCH R4 2/7] xen/balloon: HVM mode support |
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On Wed, Mar 09, 2011 at 01:58:30PM +0000, Stefano Stabellini wrote: > On Tue, 8 Mar 2011, Daniel Kiper wrote: > > HVM mode support. > > I have already a patch in linux-next to do this, please give a look at > "xen: make the ballon driver work for hvm domains": > > git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git linux-next
OK, I will remove this patch from memory hotplug patchset, however:
@@ -232,7 +232,7 @@ static int increase_reservation(unsigned long nr_pages) set_phys_to_machine(pfn, frame_list[i]); /* Link back into the page tables if not highmem. */ - if (pfn < max_low_pfn) { + if (!xen_hvm_domain() && pfn < max_low_pfn) {
Why do not write it as:
if (xen_pv_domain() && !PageHighMem(page)) ...
For me it is simpler to read (xen_pv_domain()) and make it similar to relevant part in decrease_reservation() (!PageHighMem(page)). @@ -280,7 +280,7 @@ static int decrease_reservation(unsigned long nr_pages)
scrub_page(page);
- if (!PageHighMem(page)) { + if (!xen_hvm_domain() && !PageHighMem(page)) { As above.
@@ -392,15 +392,19 @@ static struct notifier_block xenstore_notifier;
static int __init balloon_init(void) { - unsigned long pfn, extra_pfn_end; + unsigned long pfn, nr_pages, extra_pfn_end; struct page *page; - if (!xen_pv_domain()) + if (!xen_domain()) return -ENODEV; pr_info("xen_balloon: Initialising balloon driver.\n");
- balloon_stats.current_pages = min(xen_start_info->nr_pages, max_pfn); + if (xen_pv_domain()) + nr_pages = xen_start_info->nr_pages; + else + nr_pages = max_pfn; + balloon_stats.current_pages = min(nr_pages, max_pfn); It could be simplified:
balloon_stats.current_pages = xen_pv_domain() ? min(xen_start_info->nr_pages, max_pfn) : max_pfn;
Daniel
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