Messages in this thread Patch in this message | | | From | Peter Zijlstra <> | Subject | [PATCH 3/9] clockpro-PG_test.patch | Date | Fri, 30 Dec 2005 23:43:04 +0100 |
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From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Introduce a new PG_flag, needed for the clockpro work.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
include/linux/page-flags.h | 8 ++++++++ mm/page_alloc.c | 3 ++- 2 files changed, 10 insertions(+), 1 deletion(-)
Index: linux-2.6-git/include/linux/page-flags.h =================================================================== --- linux-2.6-git.orig/include/linux/page-flags.h +++ linux-2.6-git/include/linux/page-flags.h @@ -76,6 +76,8 @@ #define PG_nosave_free 18 /* Free, should not be written */ #define PG_uncached 19 /* Page has been mapped as uncached */ +#define PG_test 20 /* Page is in its test period */ + /* * Global page accounting. One instance per CPU. Only unsigned longs are * allowed. @@ -303,6 +305,12 @@ extern void __mod_page_state(unsigned lo #define SetPageUncached(page) set_bit(PG_uncached, &(page)->flags) #define ClearPageUncached(page) clear_bit(PG_uncached, &(page)->flags) +#define PageTest(page) test_bit(PG_test, &(page)->flags) +#define SetPageTest(page) set_bit(PG_test, &(page)->flags) +#define TestSetPageTest(page) test_and_set_bit(PG_test, &(page)->flags) +#define ClearPageTest(page) clear_bit(PG_test, &(page)->flags) +#define TestClearPageTest(page) test_and_clear_bit(PG_test, &(page)->flags) + struct page; /* forward declaration */ int test_clear_page_dirty(struct page *page); Index: linux-2.6-git/mm/page_alloc.c =================================================================== --- linux-2.6-git.orig/mm/page_alloc.c +++ linux-2.6-git/mm/page_alloc.c @@ -499,7 +499,8 @@ static int prep_new_page(struct page *pa page->flags &= ~(1 << PG_uptodate | 1 << PG_error | 1 << PG_referenced | 1 << PG_arch_1 | - 1 << PG_checked | 1 << PG_mappedtodisk); + 1 << PG_checked | 1 << PG_mappedtodisk | + 1 << PG_test); set_page_private(page, 0); set_page_refs(page, order); kernel_map_pages(page, 1 << order, 1); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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