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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-09-01 02:01:16 +0400 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-11-20 09:15:59 +0300 |
| commit | 9be4d4575906af9698de660e477f949a076c87e1 (patch) | |
| tree | 9a0857539b14c600ac6802ded4d129f23f5bcecf | |
| parent | e04195644eea7c6c14007922257704ec67156cd1 (diff) | |
| download | linux-9be4d4575906af9698de660e477f949a076c87e1.tar.xz | |
xen: add extra pages to balloon
Add extra pages in the pseudo-physical address space to the balloon
so we can extend into them later.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| -rw-r--r-- | drivers/xen/balloon.c | 15 | ||||
| -rw-r--r-- | include/xen/page.h | 7 |
2 files changed, 18 insertions, 4 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 500290b150bb..df26ee9caa68 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -119,7 +119,7 @@ static void scrub_page(struct page *page) } /* balloon_append: add the given page to the balloon. */ -static void balloon_append(struct page *page) +static void __balloon_append(struct page *page) { /* Lowmem is re-populated first, so highmem pages go at list tail. */ if (PageHighMem(page)) { @@ -130,7 +130,11 @@ static void balloon_append(struct page *page) list_add(&page->lru, &ballooned_pages); balloon_stats.balloon_low++; } +} +static void balloon_append(struct page *page) +{ + __balloon_append(page); totalram_pages--; } @@ -416,10 +420,13 @@ static int __init balloon_init(void) register_balloon(&balloon_sysdev); /* Initialise the balloon with excess memory space. */ - for (pfn = xen_start_info->nr_pages; pfn < max_pfn; pfn++) { + for (pfn = PFN_UP(xen_extra_mem_start); + pfn < PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size); + pfn++) { page = pfn_to_page(pfn); - if (!PageReserved(page)) - balloon_append(page); + /* totalram_pages doesn't include the boot-time + balloon extension, so don't subtract from it. */ + __balloon_append(page); } target_watch.callback = watch_target; diff --git a/include/xen/page.h b/include/xen/page.h index eaf85fab1263..0be36b976f4b 100644 --- a/include/xen/page.h +++ b/include/xen/page.h @@ -1 +1,8 @@ +#ifndef _XEN_PAGE_H +#define _XEN_PAGE_H + #include <asm/xen/page.h> + +extern phys_addr_t xen_extra_mem_start, xen_extra_mem_size; + +#endif /* _XEN_PAGE_H */ |