diff options
Diffstat (limited to 'fs/xfs/xfs_aops.c')
| -rw-r--r-- | fs/xfs/xfs_aops.c | 42 |
1 files changed, 28 insertions, 14 deletions
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index c8c15c3c3147..9d6a67c7d227 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -136,7 +136,20 @@ done: memalloc_nofs_restore(nofs_flag); } -/* Finish all pending io completions. */ +/* + * Finish all pending IO completions that require transactional modifications. + * + * We try to merge physical and logically contiguous ioends before completion to + * minimise the number of transactions we need to perform during IO completion. + * Both unwritten extent conversion and COW remapping need to iterate and modify + * one physical extent at a time, so we gain nothing by merging physically + * discontiguous extents here. + * + * The ioend chain length that we can be processing here is largely unbound in + * length and we may have to perform significant amounts of work on each ioend + * to complete it. Hence we have to be careful about holding the CPU for too + * long in this loop. + */ void xfs_end_io( struct work_struct *work) @@ -157,6 +170,7 @@ xfs_end_io( list_del_init(&ioend->io_list); iomap_ioend_try_merge(ioend, &tmp); xfs_end_ioend(ioend); + cond_resched(); } } @@ -359,7 +373,7 @@ retry: isnullstartblock(imap.br_startblock)) goto allocate_blocks; - xfs_bmbt_to_iomap(ip, &wpc->iomap, &imap, 0); + xfs_bmbt_to_iomap(ip, &wpc->iomap, &imap, 0, 0); trace_xfs_map_blocks_found(ip, offset, count, whichfork, &imap); return 0; allocate_blocks: @@ -437,37 +451,37 @@ xfs_prepare_ioend( * see a ENOSPC in writeback). */ static void -xfs_discard_page( - struct page *page, - loff_t fileoff) +xfs_discard_folio( + struct folio *folio, + loff_t pos) { - struct inode *inode = page->mapping->host; + struct inode *inode = folio->mapping->host; struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; - unsigned int pageoff = offset_in_page(fileoff); - xfs_fileoff_t start_fsb = XFS_B_TO_FSBT(mp, fileoff); - xfs_fileoff_t pageoff_fsb = XFS_B_TO_FSBT(mp, pageoff); + size_t offset = offset_in_folio(folio, pos); + xfs_fileoff_t start_fsb = XFS_B_TO_FSBT(mp, pos); + xfs_fileoff_t pageoff_fsb = XFS_B_TO_FSBT(mp, offset); int error; if (xfs_is_shutdown(mp)) goto out_invalidate; xfs_alert_ratelimited(mp, - "page discard on page "PTR_FMT", inode 0x%llx, offset %llu.", - page, ip->i_ino, fileoff); + "page discard on page "PTR_FMT", inode 0x%llx, pos %llu.", + folio, ip->i_ino, pos); error = xfs_bmap_punch_delalloc_range(ip, start_fsb, - i_blocks_per_page(inode, page) - pageoff_fsb); + i_blocks_per_folio(inode, folio) - pageoff_fsb); if (error && !xfs_is_shutdown(mp)) xfs_alert(mp, "page discard unable to remove delalloc mapping."); out_invalidate: - iomap_invalidatepage(page, pageoff, PAGE_SIZE - pageoff); + iomap_invalidate_folio(folio, offset, folio_size(folio) - offset); } static const struct iomap_writeback_ops xfs_writeback_ops = { .map_blocks = xfs_map_blocks, .prepare_ioend = xfs_prepare_ioend, - .discard_page = xfs_discard_page, + .discard_folio = xfs_discard_folio, }; STATIC int |