diff options
Diffstat (limited to 'fs')
-rw-r--r-- | fs/f2fs/node.c | 89 |
1 files changed, 63 insertions, 26 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 0e1a3df..0855168 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1565,47 +1565,84 @@ int recover_inode_page(struct f2fs_sb_info *sbi, struct page *page) return 0; } +/* + * ra_sum_pages() merge contiguous pages into one bio and submit. + * these pre-readed pages are linked in pages list. + */ +static int ra_sum_pages(struct f2fs_sb_info *sbi, struct list_head *pages, + int start, int nrpages) +{ + struct page *page; + int page_idx = start; + + for (; page_idx < start + nrpages; page_idx++) { + /* alloc temporal page for read node summary info*/ + page = alloc_page(GFP_NOFS | __GFP_ZERO); + if (!page) { + struct page *tmp; + list_for_each_entry_safe(page, tmp, pages, lru) { + list_del(&page->lru); + unlock_page(page); + __free_pages(page, 0); + } + return -ENOMEM; + } + + lock_page(page); + page->index = page_idx; + list_add_tail(&page->lru, pages); + } + + list_for_each_entry(page, pages, lru) + f2fs_submit_page_mbio(sbi, page, page->index, META, READ); + + f2fs_submit_merged_bio(sbi, META, true, READ); + return 0; +} + int restore_node_summary(struct f2fs_sb_info *sbi, unsigned int segno, struct f2fs_summary_block *sum) { struct f2fs_node *rn; struct f2fs_summary *sum_entry; - struct page *page; + struct page *page, *tmp; block_t addr; - int i, last_offset; - - /* alloc temporal page for read node */ - page = alloc_page(GFP_NOFS | __GFP_ZERO); - if (!page) - return -ENOMEM; - lock_page(page); + int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); + int i, last_offset, nrpages, err = 0; + LIST_HEAD(page_list); /* scan the node segment */ last_offset = sbi->blocks_per_seg; addr = START_BLOCK(sbi, segno); sum_entry = &sum->entries[0]; - for (i = 0; i < last_offset; i++, sum_entry++) { - /* - * In order to read next node page, - * we must clear PageUptodate flag. - */ - ClearPageUptodate(page); + for (i = 0; i < last_offset; i += nrpages, addr += nrpages) { + nrpages = min(last_offset - i, bio_blocks); - if (f2fs_submit_page_bio(sbi, page, addr, READ_SYNC)) - goto out; + /* read ahead node pages */ + err = ra_sum_pages(sbi, &page_list, addr, nrpages); + if (err) + return err; - lock_page(page); - rn = F2FS_NODE(page); - sum_entry->nid = rn->footer.nid; - sum_entry->version = 0; - sum_entry->ofs_in_node = 0; - addr++; + list_for_each_entry_safe(page, tmp, &page_list, lru) { + + lock_page(page); + if(PageUptodate(page)) { + rn = F2FS_NODE(page); + sum_entry->nid = rn->footer.nid; + sum_entry->version = 0; + sum_entry->ofs_in_node = 0; + sum_entry++; + } else { + err = -EIO; + } + + list_del(&page->lru); + unlock_page(page); + __free_pages(page, 0); + } } - unlock_page(page); -out: - __free_pages(page, 0); - return 0; + return err; } static bool flush_nats_in_journal(struct f2fs_sb_info *sbi) |