From: kernel test robot <lkp@intel.com>
To: Kairui Song <ryncsn@gmail.com>, linux-mm@kvack.org
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
Baoquan He <bhe@redhat.com>, Barry Song <baohua@kernel.org>,
Chris Li <chrisl@kernel.org>, Nhat Pham <nphamcs@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Yosry Ahmed <yosry.ahmed@linux.dev>,
David Hildenbrand <david@redhat.com>,
Youngjun Park <youngjun.park@lge.com>,
Hugh Dickins <hughd@google.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
"Huang, Ying" <ying.huang@linux.alibaba.com>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
linux-kernel@vger.kernel.org, Kairui Song <kasong@tencent.com>
Subject: Re: [PATCH 14/19] mm, swap: sanitize swap entry management workflow
Date: Thu, 30 Oct 2025 03:25:46 +0800 [thread overview]
Message-ID: <202510300341.cOYqY4ki-lkp@intel.com> (raw)
In-Reply-To: <20251029-swap-table-p2-v1-14-3d43f3b6ec32@tencent.com>
Hi Kairui,
kernel test robot noticed the following build errors:
[auto build test ERROR on f30d294530d939fa4b77d61bc60f25c4284841fa]
url: https://github.com/intel-lab-lkp/linux/commits/Kairui-Song/mm-swap-rename-__read_swap_cache_async-to-swap_cache_alloc_folio/20251030-000506
base: f30d294530d939fa4b77d61bc60f25c4284841fa
patch link: https://lore.kernel.org/r/20251029-swap-table-p2-v1-14-3d43f3b6ec32%40tencent.com
patch subject: [PATCH 14/19] mm, swap: sanitize swap entry management workflow
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20251030/202510300341.cOYqY4ki-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251030/202510300341.cOYqY4ki-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510300341.cOYqY4ki-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from mm/shmem.c:44:
mm/swap.h:465:1: warning: non-void function does not return a value [-Wreturn-type]
465 | }
| ^
>> mm/shmem.c:1649:29: error: too few arguments to function call, expected 2, have 1
1649 | if (!folio_alloc_swap(folio)) {
| ~~~~~~~~~~~~~~~~ ^
mm/swap.h:388:19: note: 'folio_alloc_swap' declared here
388 | static inline int folio_alloc_swap(struct folio *folio, gfp_t gfp)
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.
vim +1649 mm/shmem.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 1563
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1564) /**
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1565) * shmem_writeout - Write the folio to swap
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1566) * @folio: The folio to write
44b1b073eb3614 Christoph Hellwig 2025-06-10 1567 * @plug: swap plug
44b1b073eb3614 Christoph Hellwig 2025-06-10 1568 * @folio_list: list to put back folios on split
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1569) *
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1570) * Move the folio from the page cache to the swap cache.
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1571) */
44b1b073eb3614 Christoph Hellwig 2025-06-10 1572 int shmem_writeout(struct folio *folio, struct swap_iocb **plug,
44b1b073eb3614 Christoph Hellwig 2025-06-10 1573 struct list_head *folio_list)
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1574) {
8ccee8c19c605a Luis Chamberlain 2023-03-09 1575 struct address_space *mapping = folio->mapping;
8ccee8c19c605a Luis Chamberlain 2023-03-09 1576 struct inode *inode = mapping->host;
8ccee8c19c605a Luis Chamberlain 2023-03-09 1577 struct shmem_inode_info *info = SHMEM_I(inode);
2c6efe9cf2d784 Luis Chamberlain 2023-03-09 1578 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
6922c0c7abd387 Hugh Dickins 2011-08-03 1579 pgoff_t index;
650180760be6bb Baolin Wang 2024-08-12 1580 int nr_pages;
809bc86517cc40 Baolin Wang 2024-08-12 1581 bool split = false;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1582
adae46ac1e38a2 Ricardo Cañuelo Navarro 2025-02-26 1583 if ((info->flags & VM_LOCKED) || sbinfo->noswap)
9a976f0c847b67 Luis Chamberlain 2023-03-09 1584 goto redirty;
9a976f0c847b67 Luis Chamberlain 2023-03-09 1585
9a976f0c847b67 Luis Chamberlain 2023-03-09 1586 if (!total_swap_pages)
9a976f0c847b67 Luis Chamberlain 2023-03-09 1587 goto redirty;
9a976f0c847b67 Luis Chamberlain 2023-03-09 1588
1e6decf30af5c5 Hugh Dickins 2021-09-02 1589 /*
809bc86517cc40 Baolin Wang 2024-08-12 1590 * If CONFIG_THP_SWAP is not enabled, the large folio should be
809bc86517cc40 Baolin Wang 2024-08-12 1591 * split when swapping.
809bc86517cc40 Baolin Wang 2024-08-12 1592 *
809bc86517cc40 Baolin Wang 2024-08-12 1593 * And shrinkage of pages beyond i_size does not split swap, so
809bc86517cc40 Baolin Wang 2024-08-12 1594 * swapout of a large folio crossing i_size needs to split too
809bc86517cc40 Baolin Wang 2024-08-12 1595 * (unless fallocate has been used to preallocate beyond EOF).
1e6decf30af5c5 Hugh Dickins 2021-09-02 1596 */
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1597) if (folio_test_large(folio)) {
809bc86517cc40 Baolin Wang 2024-08-12 1598 index = shmem_fallocend(inode,
809bc86517cc40 Baolin Wang 2024-08-12 1599 DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE));
809bc86517cc40 Baolin Wang 2024-08-12 1600 if ((index > folio->index && index < folio_next_index(folio)) ||
809bc86517cc40 Baolin Wang 2024-08-12 1601 !IS_ENABLED(CONFIG_THP_SWAP))
809bc86517cc40 Baolin Wang 2024-08-12 1602 split = true;
809bc86517cc40 Baolin Wang 2024-08-12 1603 }
809bc86517cc40 Baolin Wang 2024-08-12 1604
809bc86517cc40 Baolin Wang 2024-08-12 1605 if (split) {
809bc86517cc40 Baolin Wang 2024-08-12 1606 try_split:
1e6decf30af5c5 Hugh Dickins 2021-09-02 1607 /* Ensure the subpages are still dirty */
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1608) folio_test_set_dirty(folio);
44b1b073eb3614 Christoph Hellwig 2025-06-10 1609 if (split_folio_to_list(folio, folio_list))
1e6decf30af5c5 Hugh Dickins 2021-09-02 1610 goto redirty;
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1611) folio_clear_dirty(folio);
1e6decf30af5c5 Hugh Dickins 2021-09-02 1612 }
1e6decf30af5c5 Hugh Dickins 2021-09-02 1613
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1614) index = folio->index;
650180760be6bb Baolin Wang 2024-08-12 1615 nr_pages = folio_nr_pages(folio);
1635f6a74152f1 Hugh Dickins 2012-05-29 1616
1635f6a74152f1 Hugh Dickins 2012-05-29 1617 /*
1635f6a74152f1 Hugh Dickins 2012-05-29 1618 * This is somewhat ridiculous, but without plumbing a SWAP_MAP_FALLOC
1635f6a74152f1 Hugh Dickins 2012-05-29 1619 * value into swapfile.c, the only way we can correctly account for a
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1620) * fallocated folio arriving here is now to initialize it and write it.
1aac1400319d30 Hugh Dickins 2012-05-29 1621 *
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1622) * That's okay for a folio already fallocated earlier, but if we have
1aac1400319d30 Hugh Dickins 2012-05-29 1623 * not yet completed the fallocation, then (a) we want to keep track
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1624) * of this folio in case we have to undo it, and (b) it may not be a
1aac1400319d30 Hugh Dickins 2012-05-29 1625 * good idea to continue anyway, once we're pushing into swap. So
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1626) * reactivate the folio, and let shmem_fallocate() quit when too many.
1635f6a74152f1 Hugh Dickins 2012-05-29 1627 */
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1628) if (!folio_test_uptodate(folio)) {
1aac1400319d30 Hugh Dickins 2012-05-29 1629 if (inode->i_private) {
1aac1400319d30 Hugh Dickins 2012-05-29 1630 struct shmem_falloc *shmem_falloc;
1aac1400319d30 Hugh Dickins 2012-05-29 1631 spin_lock(&inode->i_lock);
1aac1400319d30 Hugh Dickins 2012-05-29 1632 shmem_falloc = inode->i_private;
1aac1400319d30 Hugh Dickins 2012-05-29 1633 if (shmem_falloc &&
8e205f779d1443 Hugh Dickins 2014-07-23 1634 !shmem_falloc->waitq &&
1aac1400319d30 Hugh Dickins 2012-05-29 1635 index >= shmem_falloc->start &&
1aac1400319d30 Hugh Dickins 2012-05-29 1636 index < shmem_falloc->next)
d77b90d2b26426 Baolin Wang 2024-12-19 1637 shmem_falloc->nr_unswapped += nr_pages;
1aac1400319d30 Hugh Dickins 2012-05-29 1638 else
1aac1400319d30 Hugh Dickins 2012-05-29 1639 shmem_falloc = NULL;
1aac1400319d30 Hugh Dickins 2012-05-29 1640 spin_unlock(&inode->i_lock);
1aac1400319d30 Hugh Dickins 2012-05-29 1641 if (shmem_falloc)
1aac1400319d30 Hugh Dickins 2012-05-29 1642 goto redirty;
1aac1400319d30 Hugh Dickins 2012-05-29 1643 }
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1644) folio_zero_range(folio, 0, folio_size(folio));
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1645) flush_dcache_folio(folio);
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1646) folio_mark_uptodate(folio);
1635f6a74152f1 Hugh Dickins 2012-05-29 1647 }
1635f6a74152f1 Hugh Dickins 2012-05-29 1648
7d14492199f93c Kairui Song 2025-10-24 @1649 if (!folio_alloc_swap(folio)) {
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1650 bool first_swapped = shmem_recalc_inode(inode, 0, nr_pages);
6344a6d9ce13ae Hugh Dickins 2025-07-16 1651 int error;
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1652
b1dea800ac3959 Hugh Dickins 2011-05-11 1653 /*
b1dea800ac3959 Hugh Dickins 2011-05-11 1654 * Add inode to shmem_unuse()'s list of swapped-out inodes,
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1655) * if it's not already there. Do it now before the folio is
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1656 * removed from page cache, when its pagelock no longer
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1657 * protects the inode from eviction. And do it now, after
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1658 * we've incremented swapped, because shmem_unuse() will
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1659 * prune a !swapped inode from the swaplist.
b1dea800ac3959 Hugh Dickins 2011-05-11 1660 */
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1661 if (first_swapped) {
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1662 spin_lock(&shmem_swaplist_lock);
05bf86b4ccfd0f Hugh Dickins 2011-05-14 1663 if (list_empty(&info->swaplist))
b56a2d8af9147a Vineeth Remanan Pillai 2019-03-05 1664 list_add(&info->swaplist, &shmem_swaplist);
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1665 spin_unlock(&shmem_swaplist_lock);
ea693aaa5ce5ad Hugh Dickins 2025-07-16 1666 }
b1dea800ac3959 Hugh Dickins 2011-05-11 1667
80d6ed40156385 Kairui Song 2025-10-29 1668 folio_dup_swap(folio, NULL);
b487a2da3575b6 Kairui Song 2025-03-14 1669 shmem_delete_from_page_cache(folio, swp_to_radix_entry(folio->swap));
267a4c76bbdb95 Hugh Dickins 2015-12-11 1670
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1671) BUG_ON(folio_mapped(folio));
6344a6d9ce13ae Hugh Dickins 2025-07-16 1672 error = swap_writeout(folio, plug);
6344a6d9ce13ae Hugh Dickins 2025-07-16 1673 if (error != AOP_WRITEPAGE_ACTIVATE) {
6344a6d9ce13ae Hugh Dickins 2025-07-16 1674 /* folio has been unlocked */
6344a6d9ce13ae Hugh Dickins 2025-07-16 1675 return error;
6344a6d9ce13ae Hugh Dickins 2025-07-16 1676 }
6344a6d9ce13ae Hugh Dickins 2025-07-16 1677
6344a6d9ce13ae Hugh Dickins 2025-07-16 1678 /*
6344a6d9ce13ae Hugh Dickins 2025-07-16 1679 * The intention here is to avoid holding on to the swap when
6344a6d9ce13ae Hugh Dickins 2025-07-16 1680 * zswap was unable to compress and unable to writeback; but
6344a6d9ce13ae Hugh Dickins 2025-07-16 1681 * it will be appropriate if other reactivate cases are added.
6344a6d9ce13ae Hugh Dickins 2025-07-16 1682 */
6344a6d9ce13ae Hugh Dickins 2025-07-16 1683 error = shmem_add_to_page_cache(folio, mapping, index,
6344a6d9ce13ae Hugh Dickins 2025-07-16 1684 swp_to_radix_entry(folio->swap),
6344a6d9ce13ae Hugh Dickins 2025-07-16 1685 __GFP_HIGH | __GFP_NOMEMALLOC | __GFP_NOWARN);
6344a6d9ce13ae Hugh Dickins 2025-07-16 1686 /* Swap entry might be erased by racing shmem_free_swap() */
6344a6d9ce13ae Hugh Dickins 2025-07-16 1687 if (!error) {
6344a6d9ce13ae Hugh Dickins 2025-07-16 1688 shmem_recalc_inode(inode, 0, -nr_pages);
80d6ed40156385 Kairui Song 2025-10-29 1689 folio_put_swap(folio, NULL);
6344a6d9ce13ae Hugh Dickins 2025-07-16 1690 }
6344a6d9ce13ae Hugh Dickins 2025-07-16 1691
6344a6d9ce13ae Hugh Dickins 2025-07-16 1692 /*
fd8d4f862f8c27 Kairui Song 2025-09-17 1693 * The swap_cache_del_folio() below could be left for
6344a6d9ce13ae Hugh Dickins 2025-07-16 1694 * shrink_folio_list()'s folio_free_swap() to dispose of;
6344a6d9ce13ae Hugh Dickins 2025-07-16 1695 * but I'm a little nervous about letting this folio out of
6344a6d9ce13ae Hugh Dickins 2025-07-16 1696 * shmem_writeout() in a hybrid half-tmpfs-half-swap state
6344a6d9ce13ae Hugh Dickins 2025-07-16 1697 * e.g. folio_mapping(folio) might give an unexpected answer.
6344a6d9ce13ae Hugh Dickins 2025-07-16 1698 */
fd8d4f862f8c27 Kairui Song 2025-09-17 1699 swap_cache_del_folio(folio);
6344a6d9ce13ae Hugh Dickins 2025-07-16 1700 goto redirty;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1701 }
b487a2da3575b6 Kairui Song 2025-03-14 1702 if (nr_pages > 1)
b487a2da3575b6 Kairui Song 2025-03-14 1703 goto try_split;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1704 redirty:
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1705) folio_mark_dirty(folio);
f530ed0e2d01aa Matthew Wilcox (Oracle 2022-09-02 1706) return AOP_WRITEPAGE_ACTIVATE; /* Return with folio locked */
^1da177e4c3f41 Linus Torvalds 2005-04-16 1707 }
7b73c12c6ebf00 Matthew Wilcox (Oracle 2025-04-02 1708) EXPORT_SYMBOL_GPL(shmem_writeout);
^1da177e4c3f41 Linus Torvalds 2005-04-16 1709
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2025-10-29 19:26 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-29 15:58 [PATCH 00/19] mm, swap: never bypass swap cache and cleanup flags (swap table phase II) Kairui Song
2025-10-29 15:58 ` [PATCH 01/19] mm/swap: rename __read_swap_cache_async to swap_cache_alloc_folio Kairui Song
2025-10-30 22:53 ` Yosry Ahmed
[not found] ` <CAGsJ_4x1P0ypm70De7qDcDxqvY93GEPW6X2sBS_xfSUem5_S2w@mail.gmail.com>
2025-11-03 9:02 ` Kairui Song
2025-11-03 9:10 ` Barry Song
2025-11-03 16:50 ` Yosry Ahmed
2025-10-29 15:58 ` [PATCH 02/19] mm, swap: split swap cache preparation loop into a standalone helper Kairui Song
2025-10-29 15:58 ` [PATCH 03/19] mm, swap: never bypass the swap cache even for SWP_SYNCHRONOUS_IO Kairui Song
2025-11-04 3:47 ` Barry Song
2025-11-04 10:44 ` Kairui Song
2025-10-29 15:58 ` [PATCH 04/19] mm, swap: always try to free swap cache for SWP_SYNCHRONOUS_IO devices Kairui Song
2025-11-04 4:19 ` Barry Song
2025-11-04 8:26 ` Barry Song
2025-11-04 10:55 ` Kairui Song
2025-10-29 15:58 ` [PATCH 05/19] mm, swap: simplify the code and reduce indention Kairui Song
2025-10-29 15:58 ` [PATCH 06/19] mm, swap: free the swap cache after folio is mapped Kairui Song
2025-11-04 9:14 ` Barry Song
2025-11-04 10:50 ` Kairui Song
2025-11-04 19:52 ` Barry Song
2025-10-29 15:58 ` [PATCH 07/19] mm/shmem: never bypass the swap cache for SWP_SYNCHRONOUS_IO Kairui Song
2025-10-29 15:58 ` [PATCH 08/19] mm/shmem, swap: remove SWAP_MAP_SHMEM Kairui Song
2025-10-29 15:58 ` [PATCH 09/19] mm, swap: swap entry of a bad slot should not be considered as swapped out Kairui Song
2025-10-29 15:58 ` [PATCH 10/19] mm, swap: consolidate cluster reclaim and check logic Kairui Song
2025-10-31 5:25 ` YoungJun Park
2025-10-31 7:11 ` Kairui Song
2025-10-29 15:58 ` [PATCH 11/19] mm, swap: split locked entry duplicating into a standalone helper Kairui Song
2025-10-29 15:58 ` [PATCH 12/19] mm, swap: use swap cache as the swap in synchronize layer Kairui Song
2025-10-29 19:25 ` kernel test robot
2025-10-29 15:58 ` [PATCH 13/19] mm, swap: remove workaround for unsynchronized swap map cache state Kairui Song
2025-11-07 3:07 ` Barry Song
2025-11-09 14:18 ` Kairui Song
2025-11-10 7:21 ` Barry Song
2025-11-16 16:01 ` Kairui Song
2025-10-29 15:58 ` [PATCH 14/19] mm, swap: sanitize swap entry management workflow Kairui Song
2025-10-29 19:25 ` kernel test robot
2025-10-30 5:25 ` Kairui Song
2025-10-29 19:25 ` kernel test robot [this message]
2025-11-01 4:51 ` YoungJun Park
2025-11-01 8:59 ` Kairui Song
2025-11-01 9:08 ` YoungJun Park
2025-10-29 15:58 ` [PATCH 15/19] mm, swap: add folio to swap cache directly on allocation Kairui Song
2025-10-29 16:52 ` Kairui Song
2025-10-31 5:56 ` YoungJun Park
2025-10-31 7:02 ` Kairui Song
2025-10-29 15:58 ` [PATCH 16/19] mm, swap: check swap table directly for checking cache Kairui Song
2025-11-06 21:02 ` Barry Song
2025-11-07 3:13 ` Kairui Song
2025-10-29 15:58 ` [PATCH 17/19] mm, swap: clean up and improve swap entries freeing Kairui Song
2025-10-29 15:58 ` [PATCH 18/19] mm, swap: drop the SWAP_HAS_CACHE flag Kairui Song
2025-10-29 15:58 ` [PATCH 19/19] mm, swap: remove no longer needed _swap_info_get Kairui Song
2025-10-30 23:04 ` [PATCH 00/19] mm, swap: never bypass swap cache and cleanup flags (swap table phase II) Yosry Ahmed
2025-10-31 6:58 ` Kairui Song
2025-11-05 7:39 ` Chris Li
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