tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 593ef1658ecf61d3619885bdbbcfffa3d1417891 commit: 196e402adf2e4cd66f101923409f1970ec5f1af3 [10419/14048] ext4: improve cr 0 / cr 1 group scanning config: powerpc-randconfig-r036-20210420 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ca8eef7e3da8f750d7c7aa004fe426d1d34787ea) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=196e402adf2e4cd66f101923409f1970ec5f1af3 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 196e402adf2e4cd66f101923409f1970ec5f1af3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:63:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:557:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from fs/ext4/mballoc.c:12: In file included from fs/ext4/ext4_jbd2.h:16: In file included from include/linux/jbd2.h:23: In file included from include/linux/buffer_head.h:14: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:65:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:558:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from fs/ext4/mballoc.c:12: In file included from fs/ext4/ext4_jbd2.h:16: In file included from include/linux/jbd2.h:23: In file included from include/linux/buffer_head.h:14: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:67:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:559:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from fs/ext4/mballoc.c:12: In file included from fs/ext4/ext4_jbd2.h:16: In file included from include/linux/jbd2.h:23: In file included from include/linux/buffer_head.h:14: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:69:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:560:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from fs/ext4/mballoc.c:12: In file included from fs/ext4/ext4_jbd2.h:16: In file included from include/linux/jbd2.h:23: In file included from include/linux/buffer_head.h:14: In file included from include/linux/pagemap.h:11: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:71:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> fs/ext4/mballoc.c:2614:1: warning: stack frame size of 2416 bytes in function 'ext4_mb_regular_allocator' [-Wframe-larger-than=] ext4_mb_regular_allocator(struct ext4_allocation_context *ac) ^ 13 warnings generated. vim +/ext4_mb_regular_allocator +2614 fs/ext4/mballoc.c cfd73237722135 Alex Zhuravlev 2020-04-21 2612 4ddfef7b41aebb Eric Sandeen 2008-04-29 2613 static noinline_for_stack int 4ddfef7b41aebb Eric Sandeen 2008-04-29 @2614 ext4_mb_regular_allocator(struct ext4_allocation_context *ac) c9de560ded61fa Alex Tomas 2008-01-29 2615 { cfd73237722135 Alex Zhuravlev 2020-04-21 2616 ext4_group_t prefetch_grp = 0, ngroups, group, i; bbc4ec77e9f9c7 Ritesh Harjani 2020-05-10 2617 int cr = -1; 42ac1848eac588 Lukas Czerner 2015-06-08 2618 int err = 0, first_err = 0; cfd73237722135 Alex Zhuravlev 2020-04-21 2619 unsigned int nr = 0, prefetch_ios = 0; c9de560ded61fa Alex Tomas 2008-01-29 2620 struct ext4_sb_info *sbi; c9de560ded61fa Alex Tomas 2008-01-29 2621 struct super_block *sb; c9de560ded61fa Alex Tomas 2008-01-29 2622 struct ext4_buddy e4b; 66d5e0277e225c brookxu 2020-08-17 2623 int lost; c9de560ded61fa Alex Tomas 2008-01-29 2624 c9de560ded61fa Alex Tomas 2008-01-29 2625 sb = ac->ac_sb; c9de560ded61fa Alex Tomas 2008-01-29 2626 sbi = EXT4_SB(sb); 8df9675f8b498d Theodore Ts'o 2009-05-01 2627 ngroups = ext4_get_groups_count(sb); fb0a387dcdcd21 Eric Sandeen 2009-09-16 2628 /* non-extent files are limited to low blocks/groups */ 12e9b892002d9a Dmitry Monakhov 2010-05-16 2629 if (!(ext4_test_inode_flag(ac->ac_inode, EXT4_INODE_EXTENTS))) fb0a387dcdcd21 Eric Sandeen 2009-09-16 2630 ngroups = sbi->s_blockfile_groups; fb0a387dcdcd21 Eric Sandeen 2009-09-16 2631 c9de560ded61fa Alex Tomas 2008-01-29 2632 BUG_ON(ac->ac_status == AC_STATUS_FOUND); c9de560ded61fa Alex Tomas 2008-01-29 2633 c9de560ded61fa Alex Tomas 2008-01-29 2634 /* first, try the goal */ c9de560ded61fa Alex Tomas 2008-01-29 2635 err = ext4_mb_find_by_goal(ac, &e4b); c9de560ded61fa Alex Tomas 2008-01-29 2636 if (err || ac->ac_status == AC_STATUS_FOUND) c9de560ded61fa Alex Tomas 2008-01-29 2637 goto out; c9de560ded61fa Alex Tomas 2008-01-29 2638 c9de560ded61fa Alex Tomas 2008-01-29 2639 if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY)) c9de560ded61fa Alex Tomas 2008-01-29 2640 goto out; c9de560ded61fa Alex Tomas 2008-01-29 2641 c9de560ded61fa Alex Tomas 2008-01-29 2642 /* e9a3cd48d65307 brookxu 2020-08-07 2643 * ac->ac_2order is set only if the fe_len is a power of 2 e9a3cd48d65307 brookxu 2020-08-07 2644 * if ac->ac_2order is set we also set criteria to 0 so that we c9de560ded61fa Alex Tomas 2008-01-29 2645 * try exact allocation using buddy. c9de560ded61fa Alex Tomas 2008-01-29 2646 */ c9de560ded61fa Alex Tomas 2008-01-29 2647 i = fls(ac->ac_g_ex.fe_len); c9de560ded61fa Alex Tomas 2008-01-29 2648 ac->ac_2order = 0; c9de560ded61fa Alex Tomas 2008-01-29 2649 /* c9de560ded61fa Alex Tomas 2008-01-29 2650 * We search using buddy data only if the order of the request c9de560ded61fa Alex Tomas 2008-01-29 2651 * is greater than equal to the sbi_s_mb_order2_reqs b713a5ec55bf73 Theodore Ts'o 2009-03-31 2652 * You can tune it via /sys/fs/ext4/<partition>/mb_order2_req d9b22cf9f5466a Jan Kara 2017-02-10 2653 * We also support searching for power-of-two requests only for d9b22cf9f5466a Jan Kara 2017-02-10 2654 * requests upto maximum buddy size we have constructed. c9de560ded61fa Alex Tomas 2008-01-29 2655 */ 4b68f6df105966 Harshad Shirwadkar 2021-04-01 2656 if (i >= sbi->s_mb_order2_reqs && i <= MB_NUM_ORDERS(sb)) { c9de560ded61fa Alex Tomas 2008-01-29 2657 /* c9de560ded61fa Alex Tomas 2008-01-29 2658 * This should tell if fe_len is exactly power of 2 c9de560ded61fa Alex Tomas 2008-01-29 2659 */ c9de560ded61fa Alex Tomas 2008-01-29 2660 if ((ac->ac_g_ex.fe_len & (~(1 << (i - 1)))) == 0) 1a5d5e5d51e75a Jeremy Cline 2018-08-02 2661 ac->ac_2order = array_index_nospec(i - 1, 4b68f6df105966 Harshad Shirwadkar 2021-04-01 2662 MB_NUM_ORDERS(sb)); c9de560ded61fa Alex Tomas 2008-01-29 2663 } c9de560ded61fa Alex Tomas 2008-01-29 2664 4ba74d00a20256 Theodore Ts'o 2009-08-09 2665 /* if stream allocation is enabled, use global goal */ 4ba74d00a20256 Theodore Ts'o 2009-08-09 2666 if (ac->ac_flags & EXT4_MB_STREAM_ALLOC) { c9de560ded61fa Alex Tomas 2008-01-29 2667 /* TBD: may be hot point */ c9de560ded61fa Alex Tomas 2008-01-29 2668 spin_lock(&sbi->s_md_lock); c9de560ded61fa Alex Tomas 2008-01-29 2669 ac->ac_g_ex.fe_group = sbi->s_mb_last_group; c9de560ded61fa Alex Tomas 2008-01-29 2670 ac->ac_g_ex.fe_start = sbi->s_mb_last_start; c9de560ded61fa Alex Tomas 2008-01-29 2671 spin_unlock(&sbi->s_md_lock); c9de560ded61fa Alex Tomas 2008-01-29 2672 } 4ba74d00a20256 Theodore Ts'o 2009-08-09 2673 c9de560ded61fa Alex Tomas 2008-01-29 2674 /* Let's just scan groups to find more-less suitable blocks */ c9de560ded61fa Alex Tomas 2008-01-29 2675 cr = ac->ac_2order ? 0 : 1; c9de560ded61fa Alex Tomas 2008-01-29 2676 /* c9de560ded61fa Alex Tomas 2008-01-29 2677 * cr == 0 try to get exact allocation, c9de560ded61fa Alex Tomas 2008-01-29 2678 * cr == 3 try to get anything c9de560ded61fa Alex Tomas 2008-01-29 2679 */ c9de560ded61fa Alex Tomas 2008-01-29 2680 repeat: c9de560ded61fa Alex Tomas 2008-01-29 2681 for (; cr < 4 && ac->ac_status == AC_STATUS_CONTINUE; cr++) { c9de560ded61fa Alex Tomas 2008-01-29 2682 ac->ac_criteria = cr; ed8f9c751feb3a Aneesh Kumar K.V 2008-07-11 2683 /* ed8f9c751feb3a Aneesh Kumar K.V 2008-07-11 2684 * searching for the right group start ed8f9c751feb3a Aneesh Kumar K.V 2008-07-11 2685 * from the goal value specified ed8f9c751feb3a Aneesh Kumar K.V 2008-07-11 2686 */ ed8f9c751feb3a Aneesh Kumar K.V 2008-07-11 2687 group = ac->ac_g_ex.fe_group; 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2688 ac->ac_last_optimal_group = group; 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2689 ac->ac_groups_linear_remaining = sbi->s_mb_max_linear_groups; cfd73237722135 Alex Zhuravlev 2020-04-21 2690 prefetch_grp = group; ed8f9c751feb3a Aneesh Kumar K.V 2008-07-11 2691 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2692 for (i = 0; i < ngroups; group = next_linear_group(ac, group, ngroups), 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2693 i++) { 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2694 int ret = 0, new_cr; 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2695 2ed5724d5a78a2 Theodore Ts'o 2013-06-12 2696 cond_resched(); 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2697 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2698 ext4_mb_choose_next_group(ac, &new_cr, &group, ngroups); 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2699 if (new_cr != cr) { 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2700 cr = new_cr; 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2701 goto repeat; 196e402adf2e4c Harshad Shirwadkar 2021-04-01 2702 } c9de560ded61fa Alex Tomas 2008-01-29 2703 cfd73237722135 Alex Zhuravlev 2020-04-21 2704 /* cfd73237722135 Alex Zhuravlev 2020-04-21 2705 * Batch reads of the block allocation bitmaps cfd73237722135 Alex Zhuravlev 2020-04-21 2706 * to get multiple READs in flight; limit cfd73237722135 Alex Zhuravlev 2020-04-21 2707 * prefetching at cr=0/1, otherwise mballoc can cfd73237722135 Alex Zhuravlev 2020-04-21 2708 * spend a lot of time loading imperfect groups cfd73237722135 Alex Zhuravlev 2020-04-21 2709 */ cfd73237722135 Alex Zhuravlev 2020-04-21 2710 if ((prefetch_grp == group) && cfd73237722135 Alex Zhuravlev 2020-04-21 2711 (cr > 1 || cfd73237722135 Alex Zhuravlev 2020-04-21 2712 prefetch_ios < sbi->s_mb_prefetch_limit)) { cfd73237722135 Alex Zhuravlev 2020-04-21 2713 unsigned int curr_ios = prefetch_ios; cfd73237722135 Alex Zhuravlev 2020-04-21 2714 cfd73237722135 Alex Zhuravlev 2020-04-21 2715 nr = sbi->s_mb_prefetch; cfd73237722135 Alex Zhuravlev 2020-04-21 2716 if (ext4_has_feature_flex_bg(sb)) { 82ef1370b0c175 Chunguang Xu 2020-12-04 2717 nr = 1 << sbi->s_log_groups_per_flex; 82ef1370b0c175 Chunguang Xu 2020-12-04 2718 nr -= group & (nr - 1); 82ef1370b0c175 Chunguang Xu 2020-12-04 2719 nr = min(nr, sbi->s_mb_prefetch); cfd73237722135 Alex Zhuravlev 2020-04-21 2720 } cfd73237722135 Alex Zhuravlev 2020-04-21 2721 prefetch_grp = ext4_mb_prefetch(sb, group, cfd73237722135 Alex Zhuravlev 2020-04-21 2722 nr, &prefetch_ios); cfd73237722135 Alex Zhuravlev 2020-04-21 2723 if (prefetch_ios == curr_ios) cfd73237722135 Alex Zhuravlev 2020-04-21 2724 nr = 0; cfd73237722135 Alex Zhuravlev 2020-04-21 2725 } cfd73237722135 Alex Zhuravlev 2020-04-21 2726 8a57d9d61a6e36 Curt Wohlgemuth 2010-05-16 2727 /* This now checks without needing the buddy page */ 8ef123fe02ca09 Ritesh Harjani 2020-05-20 2728 ret = ext4_mb_good_group_nolock(ac, group, cr); 42ac1848eac588 Lukas Czerner 2015-06-08 2729 if (ret <= 0) { 42ac1848eac588 Lukas Czerner 2015-06-08 2730 if (!first_err) 42ac1848eac588 Lukas Czerner 2015-06-08 2731 first_err = ret; c9de560ded61fa Alex Tomas 2008-01-29 2732 continue; 42ac1848eac588 Lukas Czerner 2015-06-08 2733 } c9de560ded61fa Alex Tomas 2008-01-29 2734 c9de560ded61fa Alex Tomas 2008-01-29 2735 err = ext4_mb_load_buddy(sb, group, &e4b); c9de560ded61fa Alex Tomas 2008-01-29 2736 if (err) c9de560ded61fa Alex Tomas 2008-01-29 2737 goto out; c9de560ded61fa Alex Tomas 2008-01-29 2738 c9de560ded61fa Alex Tomas 2008-01-29 2739 ext4_lock_group(sb, group); 8a57d9d61a6e36 Curt Wohlgemuth 2010-05-16 2740 8a57d9d61a6e36 Curt Wohlgemuth 2010-05-16 2741 /* 8a57d9d61a6e36 Curt Wohlgemuth 2010-05-16 2742 * We need to check again after locking the 8a57d9d61a6e36 Curt Wohlgemuth 2010-05-16 2743 * block group 8a57d9d61a6e36 Curt Wohlgemuth 2010-05-16 2744 */ 42ac1848eac588 Lukas Czerner 2015-06-08 2745 ret = ext4_mb_good_group(ac, group, cr); 8ef123fe02ca09 Ritesh Harjani 2020-05-20 2746 if (ret == 0) { c9de560ded61fa Alex Tomas 2008-01-29 2747 ext4_unlock_group(sb, group); e39e07fdfd98be Jing Zhang 2010-05-14 2748 ext4_mb_unload_buddy(&e4b); c9de560ded61fa Alex Tomas 2008-01-29 2749 continue; c9de560ded61fa Alex Tomas 2008-01-29 2750 } c9de560ded61fa Alex Tomas 2008-01-29 2751 c9de560ded61fa Alex Tomas 2008-01-29 2752 ac->ac_groups_scanned++; d9b22cf9f5466a Jan Kara 2017-02-10 2753 if (cr == 0) c9de560ded61fa Alex Tomas 2008-01-29 2754 ext4_mb_simple_scan_group(ac, &e4b); 506bf2d82165c0 Eric Sandeen 2010-07-27 2755 else if (cr == 1 && sbi->s_stripe && 506bf2d82165c0 Eric Sandeen 2010-07-27 2756 !(ac->ac_g_ex.fe_len % sbi->s_stripe)) c9de560ded61fa Alex Tomas 2008-01-29 2757 ext4_mb_scan_aligned(ac, &e4b); c9de560ded61fa Alex Tomas 2008-01-29 2758 else c9de560ded61fa Alex Tomas 2008-01-29 2759 ext4_mb_complex_scan_group(ac, &e4b); c9de560ded61fa Alex Tomas 2008-01-29 2760 c9de560ded61fa Alex Tomas 2008-01-29 2761 ext4_unlock_group(sb, group); e39e07fdfd98be Jing Zhang 2010-05-14 2762 ext4_mb_unload_buddy(&e4b); c9de560ded61fa Alex Tomas 2008-01-29 2763 c9de560ded61fa Alex Tomas 2008-01-29 2764 if (ac->ac_status != AC_STATUS_CONTINUE) c9de560ded61fa Alex Tomas 2008-01-29 2765 break; c9de560ded61fa Alex Tomas 2008-01-29 2766 } a6c75eaf11032f Harshad Shirwadkar 2021-04-01 2767 /* Processed all groups and haven't found blocks */ a6c75eaf11032f Harshad Shirwadkar 2021-04-01 2768 if (sbi->s_mb_stats && i == ngroups) a6c75eaf11032f Harshad Shirwadkar 2021-04-01 2769 atomic64_inc(&sbi->s_bal_cX_failed[cr]); c9de560ded61fa Alex Tomas 2008-01-29 2770 } c9de560ded61fa Alex Tomas 2008-01-29 2771 c9de560ded61fa Alex Tomas 2008-01-29 2772 if (ac->ac_b_ex.fe_len > 0 && ac->ac_status != AC_STATUS_FOUND && c9de560ded61fa Alex Tomas 2008-01-29 2773 !(ac->ac_flags & EXT4_MB_HINT_FIRST)) { c9de560ded61fa Alex Tomas 2008-01-29 2774 /* c9de560ded61fa Alex Tomas 2008-01-29 2775 * We've been searching too long. Let's try to allocate c9de560ded61fa Alex Tomas 2008-01-29 2776 * the best chunk we've found so far c9de560ded61fa Alex Tomas 2008-01-29 2777 */ c9de560ded61fa Alex Tomas 2008-01-29 2778 ext4_mb_try_best_found(ac, &e4b); c9de560ded61fa Alex Tomas 2008-01-29 2779 if (ac->ac_status != AC_STATUS_FOUND) { c9de560ded61fa Alex Tomas 2008-01-29 2780 /* c9de560ded61fa Alex Tomas 2008-01-29 2781 * Someone more lucky has already allocated it. c9de560ded61fa Alex Tomas 2008-01-29 2782 * The only thing we can do is just take first c9de560ded61fa Alex Tomas 2008-01-29 2783 * found block(s) c9de560ded61fa Alex Tomas 2008-01-29 2784 */ 66d5e0277e225c brookxu 2020-08-17 2785 lost = atomic_inc_return(&sbi->s_mb_lost_chunks); 66d5e0277e225c brookxu 2020-08-17 2786 mb_debug(sb, "lost chunk, group: %u, start: %d, len: %d, lost: %d\n", c55ee7d202857b brookxu 2020-08-15 2787 ac->ac_b_ex.fe_group, ac->ac_b_ex.fe_start, c55ee7d202857b brookxu 2020-08-15 2788 ac->ac_b_ex.fe_len, lost); c55ee7d202857b brookxu 2020-08-15 2789 c9de560ded61fa Alex Tomas 2008-01-29 2790 ac->ac_b_ex.fe_group = 0; c9de560ded61fa Alex Tomas 2008-01-29 2791 ac->ac_b_ex.fe_start = 0; c9de560ded61fa Alex Tomas 2008-01-29 2792 ac->ac_b_ex.fe_len = 0; c9de560ded61fa Alex Tomas 2008-01-29 2793 ac->ac_status = AC_STATUS_CONTINUE; c9de560ded61fa Alex Tomas 2008-01-29 2794 ac->ac_flags |= EXT4_MB_HINT_FIRST; c9de560ded61fa Alex Tomas 2008-01-29 2795 cr = 3; c9de560ded61fa Alex Tomas 2008-01-29 2796 goto repeat; c9de560ded61fa Alex Tomas 2008-01-29 2797 } c9de560ded61fa Alex Tomas 2008-01-29 2798 } a6c75eaf11032f Harshad Shirwadkar 2021-04-01 2799 a6c75eaf11032f Harshad Shirwadkar 2021-04-01 2800 if (sbi->s_mb_stats && ac->ac_status == AC_STATUS_FOUND) a6c75eaf11032f Harshad Shirwadkar 2021-04-01 2801 atomic64_inc(&sbi->s_bal_cX_hits[ac->ac_criteria]); c9de560ded61fa Alex Tomas 2008-01-29 2802 out: 42ac1848eac588 Lukas Czerner 2015-06-08 2803 if (!err && ac->ac_status != AC_STATUS_FOUND && first_err) 42ac1848eac588 Lukas Czerner 2015-06-08 2804 err = first_err; bbc4ec77e9f9c7 Ritesh Harjani 2020-05-10 2805 d3df14535f4a5b Ritesh Harjani 2020-05-10 2806 mb_debug(sb, "Best len %d, origin len %d, ac_status %u, ac_flags 0x%x, cr %d ret %d\n", bbc4ec77e9f9c7 Ritesh Harjani 2020-05-10 2807 ac->ac_b_ex.fe_len, ac->ac_o_ex.fe_len, ac->ac_status, bbc4ec77e9f9c7 Ritesh Harjani 2020-05-10 2808 ac->ac_flags, cr, err); cfd73237722135 Alex Zhuravlev 2020-04-21 2809 cfd73237722135 Alex Zhuravlev 2020-04-21 2810 if (nr) cfd73237722135 Alex Zhuravlev 2020-04-21 2811 ext4_mb_prefetch_fini(sb, prefetch_grp, nr); cfd73237722135 Alex Zhuravlev 2020-04-21 2812 c9de560ded61fa Alex Tomas 2008-01-29 2813 return err; c9de560ded61fa Alex Tomas 2008-01-29 2814 } c9de560ded61fa Alex Tomas 2008-01-29 2815 :::::: The code at line 2614 was first introduced by commit :::::: 4ddfef7b41aebbbede73f361cb938800ba3072dc ext4: reduce mballoc stack usage with noinline_for_stack :::::: TO: Eric Sandeen <sandeen@xxxxxxxxxx> :::::: CC: Theodore Ts'o <tytso@xxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip
