Use offset_in_thp() and similar helpers to submit THPs for writeback. This simplifies the logic in iomap_do_writepage() around handling the end of the file. Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> --- fs/iomap/buffered-io.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 0a1fe7d1a27c..38fd69ebd4cc 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1394,7 +1394,7 @@ iomap_add_to_ioend(struct inode *inode, loff_t offset, struct page *page, { sector_t sector = iomap_sector(&wpc->iomap, offset); unsigned len = i_blocksize(inode); - unsigned poff = offset & (PAGE_SIZE - 1); + unsigned poff = offset_in_thp(page, offset); bool merged, same_page = false; if (!wpc->ioend || !iomap_can_add_to_ioend(wpc, offset, sector)) { @@ -1444,8 +1444,9 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, struct iomap_page *iop = iomap_page_create(inode, page); struct iomap_ioend *ioend, *next; unsigned len = i_blocksize(inode); - u64 file_offset; /* file offset of page */ + loff_t pos; int error = 0, count = 0, i; + int nr_blocks = i_blocks_per_page(inode, page); LIST_HEAD(submit_list); WARN_ON_ONCE(iop && atomic_read(&iop->write_bytes_pending) != 0); @@ -1455,20 +1456,20 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, * end of the current map or find the current map invalid, grab a new * one. */ - for (i = 0, file_offset = page_offset(page); - i < (PAGE_SIZE >> inode->i_blkbits) && file_offset < end_offset; - i++, file_offset += len) { + for (i = 0, pos = page_offset(page); + i < nr_blocks && pos < end_offset; + i++, pos += len) { if (iop && !test_bit(i, iop->uptodate)) continue; - error = wpc->ops->map_blocks(wpc, inode, file_offset); + error = wpc->ops->map_blocks(wpc, inode, pos); if (error) break; if (WARN_ON_ONCE(wpc->iomap.type == IOMAP_INLINE)) continue; if (wpc->iomap.type == IOMAP_HOLE) continue; - iomap_add_to_ioend(inode, file_offset, page, iop, wpc, wbc, + iomap_add_to_ioend(inode, pos, page, iop, wpc, wbc, &submit_list); count++; } @@ -1549,11 +1550,11 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) { struct iomap_writepage_ctx *wpc = data; struct inode *inode = page->mapping->host; - pgoff_t end_index; u64 end_offset; loff_t offset; - trace_iomap_writepage(inode, page_offset(page), PAGE_SIZE); + VM_BUG_ON_PGFLAGS(PageTail(page), page); + trace_iomap_writepage(inode, page_offset(page), thp_size(page)); /* * Refuse to write the page out if we are called from reclaim context. @@ -1590,10 +1591,8 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * ---------------------------------^------------------| */ offset = i_size_read(inode); - end_index = offset >> PAGE_SHIFT; - if (page->index < end_index) - end_offset = (loff_t)(page->index + 1) << PAGE_SHIFT; - else { + end_offset = page_offset(page) + thp_size(page); + if (end_offset > offset) { /* * Check whether the page to write out is beyond or straddles * i_size or not. @@ -1605,7 +1604,8 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * | | Straddles | * ---------------------------------^-----------|--------| */ - unsigned offset_into_page = offset & (PAGE_SIZE - 1); + unsigned offset_into_page = offset_in_thp(page, offset); + pgoff_t end_index = offset >> PAGE_SHIFT; /* * Skip the page if it is fully outside i_size, e.g. due to a @@ -1636,7 +1636,7 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * memory is zeroed when mapped, and writes to that region are * not written out to the file." */ - zero_user_segment(page, offset_into_page, PAGE_SIZE); + zero_user_segment(page, offset_into_page, thp_size(page)); /* Adjust the end_offset to the end of file */ end_offset = offset; -- 2.28.0