Messages in this thread Patch in this message |  | | | From | Andi Kleen <> | | Subject | [PATCH] [12/16] Refactor truncate to allow direct truncating of page | | Date | Wed, 3 Jun 2009 20:46:46 +0200 (CEST) |
| |
From: Nick Piggin <npiggin@suse.de>
Extract out truncate_inode_page() out of the truncate path so that it can be used by memory-failure.c
[AK: description, headers, fix typos]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- include/linux/mm.h | 2 ++ mm/truncate.c | 24 ++++++++++++------------ 2 files changed, 14 insertions(+), 12 deletions(-) Index: linux/mm/truncate.c =================================================================== --- linux.orig/mm/truncate.c 2009-06-03 19:37:38.000000000 +0200 +++ linux/mm/truncate.c 2009-06-03 20:13:43.000000000 +0200 @@ -135,6 +135,16 @@ return ret; } +void truncate_inode_page(struct address_space *mapping, struct page *page) +{ + if (page_mapped(page)) { + unmap_mapping_range(mapping, + (loff_t)page->index<<PAGE_CACHE_SHIFT, + PAGE_CACHE_SIZE, 0); + } + truncate_complete_page(mapping, page); +} + /** * truncate_inode_pages - truncate range of pages specified by start & end byte offsets * @mapping: mapping to truncate @@ -196,12 +206,7 @@ unlock_page(page); continue; } - if (page_mapped(page)) { - unmap_mapping_range(mapping, - (loff_t)page_index<<PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE, 0); - } - truncate_complete_page(mapping, page); + truncate_inode_page(mapping, page); unlock_page(page); } pagevec_release(&pvec); @@ -238,15 +243,10 @@ break; lock_page(page); wait_on_page_writeback(page); - if (page_mapped(page)) { - unmap_mapping_range(mapping, - (loff_t)page->index<<PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE, 0); - } + truncate_inode_page(mapping, page); if (page->index > next) next = page->index; next++; - truncate_complete_page(mapping, page); unlock_page(page); } pagevec_release(&pvec); Index: linux/include/linux/mm.h =================================================================== --- linux.orig/include/linux/mm.h 2009-06-03 19:37:38.000000000 +0200 +++ linux/include/linux/mm.h 2009-06-03 20:39:49.000000000 +0200 @@ -811,6 +811,8 @@ extern int vmtruncate(struct inode * inode, loff_t offset); extern int vmtruncate_range(struct inode * inode, loff_t offset, loff_t end); +void truncate_inode_page(struct address_space *mapping, struct page *page); + #ifdef CONFIG_MMU extern int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, int write_access);
|  |