Messages in this thread Patch in this message | | | From | Christoph Lameter <> | Subject | [RFC 6/8] Account for pages in the page cache in terms of base pages | Date | Thu, 19 Apr 2007 09:35:35 -0700 (PDT) |
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Variable Order Page Cache: Account for higher order pages
NR_FILE_PAGES now counts pages of different order. Maybe we need to account in base page sized pages? If so then we need to change the way we update the counters. Note that the same would have to be done for other counters.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
--- mm/filemap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
Index: linux-2.6.21-rc7/mm/filemap.c =================================================================== --- linux-2.6.21-rc7.orig/mm/filemap.c 2007-04-19 09:11:13.000000000 -0700 +++ linux-2.6.21-rc7/mm/filemap.c 2007-04-19 09:14:16.000000000 -0700 @@ -119,7 +119,8 @@ void __remove_from_page_cache(struct pag radix_tree_delete(&mapping->page_tree, page->index); page->mapping = NULL; mapping->nrpages--; - __dec_zone_page_state(page, NR_FILE_PAGES); + __mod_zone_page_state(page_zone(page), NR_FILE_PAGES, + -(1 << mapping->order)); } void remove_from_page_cache(struct page *page) @@ -448,7 +449,8 @@ int add_to_page_cache(struct page *page, page->mapping = mapping; page->index = offset; mapping->nrpages++; - __inc_zone_page_state(page, NR_FILE_PAGES); + __mod_zone_page_state(page_zone(page), NR_FILE_PAGES, + 1 << mappig->order); } write_unlock_irq(&mapping->tree_lock); radix_tree_preload_end(); - 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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