diff options
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/file.c | 48 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 15 |
2 files changed, 9 insertions, 54 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 197653ea6041..57dcaea762c3 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -324,41 +324,11 @@ static int ext4_dax_fault(struct vm_fault *vmf) return ext4_dax_huge_fault(vmf, PE_SIZE_PTE); } -/* - * Handle write fault for VM_MIXEDMAP mappings. Similarly to ext4_dax_fault() - * handler we check for races agaist truncate. Note that since we cycle through - * i_mmap_sem, we are sure that also any hole punching that began before we - * were called is finished by now and so if it included part of the file we - * are working on, our pte will get unmapped and the check for pte_same() in - * wp_pfn_shared() fails. Thus fault gets retried and things work out as - * desired. - */ -static int ext4_dax_pfn_mkwrite(struct vm_fault *vmf) -{ - struct inode *inode = file_inode(vmf->vma->vm_file); - struct super_block *sb = inode->i_sb; - loff_t size; - int ret; - - sb_start_pagefault(sb); - file_update_time(vmf->vma->vm_file); - down_read(&EXT4_I(inode)->i_mmap_sem); - size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; - if (vmf->pgoff >= size) - ret = VM_FAULT_SIGBUS; - else - ret = dax_pfn_mkwrite(vmf); - up_read(&EXT4_I(inode)->i_mmap_sem); - sb_end_pagefault(sb); - - return ret; -} - static const struct vm_operations_struct ext4_dax_vm_ops = { .fault = ext4_dax_fault, .huge_fault = ext4_dax_huge_fault, .page_mkwrite = ext4_dax_fault, - .pfn_mkwrite = ext4_dax_pfn_mkwrite, + .pfn_mkwrite = ext4_dax_fault, }; #else #define ext4_dax_vm_ops ext4_file_vm_ops @@ -507,12 +477,11 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, pagevec_init(&pvec, 0); do { - int i, num; + int i; unsigned long nr_pages; - num = min_t(pgoff_t, end - index, PAGEVEC_SIZE - 1) + 1; - nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index, - (pgoff_t)num); + nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping, + &index, end); if (nr_pages == 0) break; @@ -531,9 +500,6 @@ static int ext4_find_unwritten_pgoff(struct inode *inode, goto out; } - if (page->index > end) - goto out; - lock_page(page); if (unlikely(page->mapping != inode->i_mapping)) { @@ -576,14 +542,10 @@ next: unlock_page(page); } - /* The no. of pages is less than our desired, we are done. */ - if (nr_pages < num) - break; - - index = pvec.pages[i - 1]->index + 1; pagevec_release(&pvec); } while (index <= end); + /* There are no pages upto endoff - that would be a hole in there. */ if (whence == SEEK_HOLE && lastoff < endoff) { found = 1; *offset = lastoff; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 714396760616..e963508ea35f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1720,13 +1720,12 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd, pagevec_init(&pvec, 0); while (index <= end) { - nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE); + nr_pages = pagevec_lookup_range(&pvec, mapping, &index, end); if (nr_pages == 0) break; for (i = 0; i < nr_pages; i++) { struct page *page = pvec.pages[i]; - if (page->index > end) - break; + BUG_ON(!PageLocked(page)); BUG_ON(PageWriteback(page)); if (invalidate) { @@ -1737,7 +1736,6 @@ static void mpage_release_unused_pages(struct mpage_da_data *mpd, } unlock_page(page); } - index = pvec.pages[nr_pages - 1]->index + 1; pagevec_release(&pvec); } } @@ -2348,17 +2346,13 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) pagevec_init(&pvec, 0); while (start <= end) { - nr_pages = pagevec_lookup(&pvec, inode->i_mapping, start, - PAGEVEC_SIZE); + nr_pages = pagevec_lookup_range(&pvec, inode->i_mapping, + &start, end); if (nr_pages == 0) break; for (i = 0; i < nr_pages; i++) { struct page *page = pvec.pages[i]; - if (page->index > end) - break; - /* Up to 'end' pages must be contiguous */ - BUG_ON(page->index != start); bh = head = page_buffers(page); do { if (lblk < mpd->map.m_lblk) @@ -2403,7 +2397,6 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) pagevec_release(&pvec); return err; } - start++; } pagevec_release(&pvec); } |