On Thu, Jul 21, 2022 at 6:33 PM Souptick Joarder <jrdr.linux@xxxxxxxxx> wrote: > > On Tue, Jul 12, 2022 at 1:19 AM kernel test robot <lkp@xxxxxxxxx> wrote: > > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > > head: 4112a8699ae2eac797415b9be1d7901b3f79e772 > > commit: 08d3e84feeb8cb8e20d54f659446b98fe17913aa [7625/9472] xfs: pass perag to xfs_alloc_read_agf() > > config: x86_64-randconfig-a006-20220627 (https://download.01.org/0day-ci/archive/20220712/202207120340.ToDnrawY-lkp@xxxxxxxxx/config) ^ randconfig > > compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project badda4ac3c489a8c8cccdad1f74b9308c350a9e0) > > reproduce (this is a W=1 build): > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > > chmod +x ~/bin/make.cross > > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=08d3e84feeb8cb8e20d54f659446b98fe17913aa > > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > > git fetch --no-tags linux-next master > > git checkout 08d3e84feeb8cb8e20d54f659446b98fe17913aa > > # save the config file > > mkdir build_dir && cp config build_dir/.config > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/xfs/ > > > > If you fix the issue, kindly add following tag where applicable > > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > > > All warnings (new ones prefixed by >>): > > > > >> fs/xfs/scrub/repair.c:539:19: warning: variable 'agno' set but not used [-Wunused-but-set-variable] > > xfs_agnumber_t agno; > > ^ > > 1 warning generated. > > > > > > vim +/agno +539 fs/xfs/scrub/repair.c > > > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 528 > > 86d969b425d7ec Darrick J. Wong 2018-07-30 529 /* Dispose of a single block. */ > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 530 STATIC int > > 86d969b425d7ec Darrick J. Wong 2018-07-30 531 xrep_reap_block( > > 1d8a748a8aa94a Darrick J. Wong 2018-07-19 532 struct xfs_scrub *sc, > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 533 xfs_fsblock_t fsbno, > > 66e3237e724c66 Darrick J. Wong 2018-12-12 534 const struct xfs_owner_info *oinfo, > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 535 enum xfs_ag_resv_type resv) > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 536 { > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 537 struct xfs_btree_cur *cur; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 538 struct xfs_buf *agf_bp = NULL; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 @539 xfs_agnumber_t agno; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 540 xfs_agblock_t agbno; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 541 bool has_other_rmap; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 542 int error; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 543 > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 544 agno = XFS_FSB_TO_AGNO(sc->mp, fsbno); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 545 agbno = XFS_FSB_TO_AGBNO(sc->mp, fsbno); > > 08d3e84feeb8cb Dave Chinner 2022-07-07 546 ASSERT(agno == sc->sa.pag->pag_agno); > > It is used in ASSERT(). And I'm guessing that randconfig turns this into nothing. You can silence these kinds of warnings with: (void)agno; Otherwise consider guarding the assignment by the same config affecting ASSERT. > > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 547 > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 548 /* > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 549 * If we are repairing per-inode metadata, we need to read in the AGF > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 550 * buffer. Otherwise, we're repairing a per-AG structure, so reuse > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 551 * the AGF buffer that the setup functions already grabbed. > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 552 */ > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 553 if (sc->ip) { > > 08d3e84feeb8cb Dave Chinner 2022-07-07 554 error = xfs_alloc_read_agf(sc->sa.pag, sc->tp, 0, &agf_bp); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 555 if (error) > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 556 return error; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 557 } else { > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 558 agf_bp = sc->sa.agf_bp; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 559 } > > fa9c3c197329fd Dave Chinner 2021-06-02 560 cur = xfs_rmapbt_init_cursor(sc->mp, sc->tp, agf_bp, sc->sa.pag); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 561 > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 562 /* Can we find any other rmappings? */ > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 563 error = xfs_rmap_has_other_keys(cur, agbno, 1, oinfo, &has_other_rmap); > > ef97ef26d263fb Darrick J. Wong 2018-07-19 564 xfs_btree_del_cursor(cur, error); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 565 if (error) > > ef97ef26d263fb Darrick J. Wong 2018-07-19 566 goto out_free; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 567 > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 568 /* > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 569 * If there are other rmappings, this block is cross linked and must > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 570 * not be freed. Remove the reverse mapping and move on. Otherwise, > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 571 * we were the only owner of the block, so free the extent, which will > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 572 * also remove the rmap. > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 573 * > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 574 * XXX: XFS doesn't support detecting the case where a single block > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 575 * metadata structure is crosslinked with a multi-block structure > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 576 * because the buffer cache doesn't detect aliasing problems, so we > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 577 * can't fix 100% of crosslinking problems (yet). The verifiers will > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 578 * blow on writeout, the filesystem will shut down, and the admin gets > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 579 * to run xfs_repair. > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 580 */ > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 581 if (has_other_rmap) > > fa9c3c197329fd Dave Chinner 2021-06-02 582 error = xfs_rmap_free(sc->tp, agf_bp, sc->sa.pag, agbno, > > fa9c3c197329fd Dave Chinner 2021-06-02 583 1, oinfo); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 584 else if (resv == XFS_AG_RESV_AGFL) > > b5e2196e9c7217 Darrick J. Wong 2018-07-19 585 error = xrep_put_freelist(sc, agbno); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 586 else > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 587 error = xfs_free_extent(sc->tp, fsbno, 1, oinfo, resv); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 588 if (agf_bp != sc->sa.agf_bp) > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 589 xfs_trans_brelse(sc->tp, agf_bp); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 590 if (error) > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 591 return error; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 592 > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 593 if (sc->ip) > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 594 return xfs_trans_roll_inode(&sc->tp, sc->ip); > > b5e2196e9c7217 Darrick J. Wong 2018-07-19 595 return xrep_roll_ag_trans(sc); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 596 > > ef97ef26d263fb Darrick J. Wong 2018-07-19 597 out_free: > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 598 if (agf_bp != sc->sa.agf_bp) > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 599 xfs_trans_brelse(sc->tp, agf_bp); > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 600 return error; > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 601 } > > 12c6510e2ff17c Darrick J. Wong 2018-05-29 602 > > > > :::::: The code at line 539 was first introduced by commit > > :::::: 12c6510e2ff17cf94cae08ba7b6d2355760dfd1d xfs: add helpers to dispose of old btree blocks after a repair > > > > :::::: TO: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > :::::: CC: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > > > -- > > 0-DAY CI Kernel Test Service > > https://01.org/lkp > > > -- Thanks, ~Nick Desaulniers
