Hi Dave, url: https://github.com/0day-ci/linux/commits/Dave-Chinner/xfs-log-recovery-fixes/20220317-141849 base: https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git for-next config: parisc-randconfig-m031-20220317 (https://download.01.org/0day-ci/archive/20220317/202203172212.pRLbx3jA-lkp@xxxxxxxxx/config ) compiler: hppa-linux-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: fs/xfs/xfs_trans_ail.c:476 xfsaild_push() error: uninitialized symbol 'target'. vim +/target +476 fs/xfs/xfs_trans_ail.c 0030807c66f058 Christoph Hellwig 2011-10-11 417 static long 0030807c66f058 Christoph Hellwig 2011-10-11 418 xfsaild_push( 0030807c66f058 Christoph Hellwig 2011-10-11 419 struct xfs_ail *ailp) 249a8c1124653f David Chinner 2008-02-05 420 { 57e809561118a4 Matthew Wilcox 2018-03-07 421 xfs_mount_t *mp = ailp->ail_mount; af3e40228fb2db Dave Chinner 2011-07-18 422 struct xfs_ail_cursor cur; efe2330fdc246a Christoph Hellwig 2019-06-28 423 struct xfs_log_item *lip; 9e7004e741de0b Dave Chinner 2011-05-06 424 xfs_lsn_t lsn; fe0da767311933 Dave Chinner 2011-05-06 425 xfs_lsn_t target; 43ff2122e6492b Christoph Hellwig 2012-04-23 426 long tout; 9e7004e741de0b Dave Chinner 2011-05-06 427 int stuck = 0; 43ff2122e6492b Christoph Hellwig 2012-04-23 428 int flushing = 0; 9e7004e741de0b Dave Chinner 2011-05-06 429 int count = 0; ^1da177e4c3f41 Linus Torvalds 2005-04-16 430 670ce93fef93bb Dave Chinner 2011-09-30 431 /* 43ff2122e6492b Christoph Hellwig 2012-04-23 432 * If we encountered pinned items or did not finish writing out all 0020a190cf3eac Dave Chinner 2021-08-10 433 * buffers the last time we ran, force a background CIL push to get the 0020a190cf3eac Dave Chinner 2021-08-10 434 * items unpinned in the near future. We do not wait on the CIL push as 0020a190cf3eac Dave Chinner 2021-08-10 435 * that could stall us for seconds if there is enough background IO 0020a190cf3eac Dave Chinner 2021-08-10 436 * load. Stalling for that long when the tail of the log is pinned and 0020a190cf3eac Dave Chinner 2021-08-10 437 * needs flushing will hard stop the transaction subsystem when log 0020a190cf3eac Dave Chinner 2021-08-10 438 * space runs out. 670ce93fef93bb Dave Chinner 2011-09-30 439 */ 57e809561118a4 Matthew Wilcox 2018-03-07 440 if (ailp->ail_log_flush && ailp->ail_last_pushed_lsn == 0 && 57e809561118a4 Matthew Wilcox 2018-03-07 441 (!list_empty_careful(&ailp->ail_buf_list) || 43ff2122e6492b Christoph Hellwig 2012-04-23 442 xfs_ail_min_lsn(ailp))) { 57e809561118a4 Matthew Wilcox 2018-03-07 443 ailp->ail_log_flush = 0; 43ff2122e6492b Christoph Hellwig 2012-04-23 444 ff6d6af2351cae Bill O'Donnell 2015-10-12 445 XFS_STATS_INC(mp, xs_push_ail_flush); 0020a190cf3eac Dave Chinner 2021-08-10 446 xlog_cil_flush(mp->m_log); 670ce93fef93bb Dave Chinner 2011-09-30 447 } 670ce93fef93bb Dave Chinner 2011-09-30 448 57e809561118a4 Matthew Wilcox 2018-03-07 449 spin_lock(&ailp->ail_lock); 8375f922aaa6e7 Brian Foster 2012-06-28 450 29e90a4845ecee Dave Chinner 2022-03-17 451 /* 29e90a4845ecee Dave Chinner 2022-03-17 452 * If we have a sync push waiter, we always have to push till the AIL is 29e90a4845ecee Dave Chinner 2022-03-17 453 * empty. Update the target to point to the end of the AIL so that 29e90a4845ecee Dave Chinner 2022-03-17 454 * capture updates that occur after the sync push waiter has gone to 29e90a4845ecee Dave Chinner 2022-03-17 455 * sleep. 29e90a4845ecee Dave Chinner 2022-03-17 456 */ 29e90a4845ecee Dave Chinner 2022-03-17 457 if (waitqueue_active(&ailp->ail_empty)) { 29e90a4845ecee Dave Chinner 2022-03-17 458 lip = xfs_ail_max(ailp); 29e90a4845ecee Dave Chinner 2022-03-17 459 if (lip) 29e90a4845ecee Dave Chinner 2022-03-17 460 target = lip->li_lsn; No else path. 29e90a4845ecee Dave Chinner 2022-03-17 461 } else { 57e809561118a4 Matthew Wilcox 2018-03-07 462 /* barrier matches the ail_target update in xfs_ail_push() */ 8375f922aaa6e7 Brian Foster 2012-06-28 463 smp_rmb(); 57e809561118a4 Matthew Wilcox 2018-03-07 464 target = ailp->ail_target; 57e809561118a4 Matthew Wilcox 2018-03-07 465 ailp->ail_target_prev = target; 29e90a4845ecee Dave Chinner 2022-03-17 466 } 8375f922aaa6e7 Brian Foster 2012-06-28 467 f376b45e861d8b Brian Foster 2020-07-16 468 /* we're done if the AIL is empty or our push has reached the end */ 57e809561118a4 Matthew Wilcox 2018-03-07 469 lip = xfs_trans_ail_cursor_first(ailp, &cur, ailp->ail_last_pushed_lsn); "lip" re-assigned here f376b45e861d8b Brian Foster 2020-07-16 470 if (!lip) 9e7004e741de0b Dave Chinner 2011-05-06 471 goto out_done; ^1da177e4c3f41 Linus Torvalds 2005-04-16 472 ff6d6af2351cae Bill O'Donnell 2015-10-12 473 XFS_STATS_INC(mp, xs_push_ail); ^1da177e4c3f41 Linus Torvalds 2005-04-16 474 249a8c1124653f David Chinner 2008-02-05 475 lsn = lip->li_lsn; 50e86686dfb287 Dave Chinner 2011-05-06 @476 while ((XFS_LSN_CMP(lip->li_lsn, target) <= 0)) { ^^^^^^ 249a8c1124653f David Chinner 2008-02-05 477 int lock_result; 43ff2122e6492b Christoph Hellwig 2012-04-23 478 ^1da177e4c3f41 Linus Torvalds 2005-04-16 479 /* 904c17e6832845 Dave Chinner 2013-08-28 480 * Note that iop_push may unlock and reacquire the AIL lock. We 43ff2122e6492b Christoph Hellwig 2012-04-23 481 * rely on the AIL cursor implementation to be able to deal with 43ff2122e6492b Christoph Hellwig 2012-04-23 482 * the dropped lock. ^1da177e4c3f41 Linus Torvalds 2005-04-16 483 */ 7f4d01f36a3ac1 Brian Foster 2017-08-08 484 lock_result = xfsaild_push_item(ailp, lip); ^1da177e4c3f41 Linus Torvalds 2005-04-16 485 switch (lock_result) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 486 case XFS_ITEM_SUCCESS: ff6d6af2351cae Bill O'Donnell 2015-10-12 487 XFS_STATS_INC(mp, xs_push_ail_success); 9e4c109ac82239 Christoph Hellwig 2011-10-11 488 trace_xfs_ail_push(lip); 9e4c109ac82239 Christoph Hellwig 2011-10-11 489 57e809561118a4 Matthew Wilcox 2018-03-07 490 ailp->ail_last_pushed_lsn = lsn; ^1da177e4c3f41 Linus Torvalds 2005-04-16 491 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 492 43ff2122e6492b Christoph Hellwig 2012-04-23 493 case XFS_ITEM_FLUSHING: 43ff2122e6492b Christoph Hellwig 2012-04-23 494 /* cf085a1b5d2214 Joe Perches 2019-11-07 495 * The item or its backing buffer is already being 43ff2122e6492b Christoph Hellwig 2012-04-23 496 * flushed. The typical reason for that is that an 43ff2122e6492b Christoph Hellwig 2012-04-23 497 * inode buffer is locked because we already pushed the 43ff2122e6492b Christoph Hellwig 2012-04-23 498 * updates to it as part of inode clustering. 43ff2122e6492b Christoph Hellwig 2012-04-23 499 * b63da6c8dfa9b2 Randy Dunlap 2020-08-05 500 * We do not want to stop flushing just because lots cf085a1b5d2214 Joe Perches 2019-11-07 501 * of items are already being flushed, but we need to 43ff2122e6492b Christoph Hellwig 2012-04-23 502 * re-try the flushing relatively soon if most of the cf085a1b5d2214 Joe Perches 2019-11-07 503 * AIL is being flushed. 43ff2122e6492b Christoph Hellwig 2012-04-23 504 */ ff6d6af2351cae Bill O'Donnell 2015-10-12 505 XFS_STATS_INC(mp, xs_push_ail_flushing); 43ff2122e6492b Christoph Hellwig 2012-04-23 506 trace_xfs_ail_flushing(lip); 17b38471c3c07a Christoph Hellwig 2011-10-11 507 43ff2122e6492b Christoph Hellwig 2012-04-23 508 flushing++; 57e809561118a4 Matthew Wilcox 2018-03-07 509 ailp->ail_last_pushed_lsn = lsn; ^1da177e4c3f41 Linus Torvalds 2005-04-16 510 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 511 ^1da177e4c3f41 Linus Torvalds 2005-04-16 512 case XFS_ITEM_PINNED: ff6d6af2351cae Bill O'Donnell 2015-10-12 513 XFS_STATS_INC(mp, xs_push_ail_pinned); 9e4c109ac82239 Christoph Hellwig 2011-10-11 514 trace_xfs_ail_pinned(lip); 9e4c109ac82239 Christoph Hellwig 2011-10-11 515 249a8c1124653f David Chinner 2008-02-05 516 stuck++; 57e809561118a4 Matthew Wilcox 2018-03-07 517 ailp->ail_log_flush++; ^1da177e4c3f41 Linus Torvalds 2005-04-16 518 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 519 case XFS_ITEM_LOCKED: ff6d6af2351cae Bill O'Donnell 2015-10-12 520 XFS_STATS_INC(mp, xs_push_ail_locked); 9e4c109ac82239 Christoph Hellwig 2011-10-11 521 trace_xfs_ail_locked(lip); 43ff2122e6492b Christoph Hellwig 2012-04-23 522 249a8c1124653f David Chinner 2008-02-05 523 stuck++; ^1da177e4c3f41 Linus Torvalds 2005-04-16 524 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 525 default: ^1da177e4c3f41 Linus Torvalds 2005-04-16 526 ASSERT(0); ^1da177e4c3f41 Linus Torvalds 2005-04-16 527 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 528 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 529 249a8c1124653f David Chinner 2008-02-05 530 count++; 249a8c1124653f David Chinner 2008-02-05 531 ^1da177e4c3f41 Linus Torvalds 2005-04-16 532 /* 249a8c1124653f David Chinner 2008-02-05 533 * Are there too many items we can't do anything with? 43ff2122e6492b Christoph Hellwig 2012-04-23 534 * b63da6c8dfa9b2 Randy Dunlap 2020-08-05 535 * If we are skipping too many items because we can't flush 249a8c1124653f David Chinner 2008-02-05 536 * them or they are already being flushed, we back off and 249a8c1124653f David Chinner 2008-02-05 537 * given them time to complete whatever operation is being 249a8c1124653f David Chinner 2008-02-05 538 * done. i.e. remove pressure from the AIL while we can't make 249a8c1124653f David Chinner 2008-02-05 539 * progress so traversals don't slow down further inserts and 249a8c1124653f David Chinner 2008-02-05 540 * removals to/from the AIL. 249a8c1124653f David Chinner 2008-02-05 541 * 249a8c1124653f David Chinner 2008-02-05 542 * The value of 100 is an arbitrary magic number based on 249a8c1124653f David Chinner 2008-02-05 543 * observation. ^1da177e4c3f41 Linus Torvalds 2005-04-16 544 */ 249a8c1124653f David Chinner 2008-02-05 545 if (stuck > 100) 249a8c1124653f David Chinner 2008-02-05 546 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 547 af3e40228fb2db Dave Chinner 2011-07-18 548 lip = xfs_trans_ail_cursor_next(ailp, &cur); 249a8c1124653f David Chinner 2008-02-05 549 if (lip == NULL) 249a8c1124653f David Chinner 2008-02-05 550 break; 249a8c1124653f David Chinner 2008-02-05 551 lsn = lip->li_lsn; ^1da177e4c3f41 Linus Torvalds 2005-04-16 552 } f376b45e861d8b Brian Foster 2020-07-16 553 f376b45e861d8b Brian Foster 2020-07-16 554 out_done: e4a1e29cb0ace3 Eric Sandeen 2014-04-14 555 xfs_trans_ail_cursor_done(&cur); 57e809561118a4 Matthew Wilcox 2018-03-07 556 spin_unlock(&ailp->ail_lock); ^1da177e4c3f41 Linus Torvalds 2005-04-16 557 57e809561118a4 Matthew Wilcox 2018-03-07 558 if (xfs_buf_delwri_submit_nowait(&ailp->ail_buf_list)) 57e809561118a4 Matthew Wilcox 2018-03-07 559 ailp->ail_log_flush++; d808f617ad00a4 Dave Chinner 2010-02-02 560 43ff2122e6492b Christoph Hellwig 2012-04-23 561 if (!count || XFS_LSN_CMP(lsn, target) >= 0) { 249a8c1124653f David Chinner 2008-02-05 562 /* 43ff2122e6492b Christoph Hellwig 2012-04-23 563 * We reached the target or the AIL is empty, so wait a bit 43ff2122e6492b Christoph Hellwig 2012-04-23 564 * longer for I/O to complete and remove pushed items from the 43ff2122e6492b Christoph Hellwig 2012-04-23 565 * AIL before we start the next scan from the start of the AIL. 249a8c1124653f David Chinner 2008-02-05 566 */ 453eac8a9aa417 Dave Chinner 2010-01-11 567 tout = 50; 57e809561118a4 Matthew Wilcox 2018-03-07 568 ailp->ail_last_pushed_lsn = 0; 43ff2122e6492b Christoph Hellwig 2012-04-23 569 } else if (((stuck + flushing) * 100) / count > 90) { 249a8c1124653f David Chinner 2008-02-05 570 /* 43ff2122e6492b Christoph Hellwig 2012-04-23 571 * Either there is a lot of contention on the AIL or we are 43ff2122e6492b Christoph Hellwig 2012-04-23 572 * stuck due to operations in progress. "Stuck" in this case 43ff2122e6492b Christoph Hellwig 2012-04-23 573 * is defined as >90% of the items we tried to push were stuck. 249a8c1124653f David Chinner 2008-02-05 574 * 249a8c1124653f David Chinner 2008-02-05 575 * Backoff a bit more to allow some I/O to complete before 43ff2122e6492b Christoph Hellwig 2012-04-23 576 * restarting from the start of the AIL. This prevents us from 43ff2122e6492b Christoph Hellwig 2012-04-23 577 * spinning on the same items, and if they are pinned will all 43ff2122e6492b Christoph Hellwig 2012-04-23 578 * the restart to issue a log force to unpin the stuck items. 249a8c1124653f David Chinner 2008-02-05 579 */ 453eac8a9aa417 Dave Chinner 2010-01-11 580 tout = 20; 57e809561118a4 Matthew Wilcox 2018-03-07 581 ailp->ail_last_pushed_lsn = 0; 43ff2122e6492b Christoph Hellwig 2012-04-23 582 } else { 43ff2122e6492b Christoph Hellwig 2012-04-23 583 /* 43ff2122e6492b Christoph Hellwig 2012-04-23 584 * Assume we have more work to do in a short while. 43ff2122e6492b Christoph Hellwig 2012-04-23 585 */ 43ff2122e6492b Christoph Hellwig 2012-04-23 586 tout = 10; ^1da177e4c3f41 Linus Torvalds 2005-04-16 587 } 0bf6a5bd4b55b4 Dave Chinner 2011-04-08 588 0030807c66f058 Christoph Hellwig 2011-10-11 589 return tout; 0030807c66f058 Christoph Hellwig 2011-10-11 590 } --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx _______________________________________________ kbuild mailing list -- kbuild@xxxxxxxxxxxx To unsubscribe send an email to kbuild-leave@xxxxxxxxxxxx
