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Date: Sun, 27 Dec 2009 23:32:25 +0300 From: Alexander Beregalov <a.beregalov@...il.com> To: Dmitry Monakhov <dmonakhov@...nvz.org> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>, "Theodore Ts'o" <tytso@....edu>, dmitry.torokhov@...il.com Subject: Re: 2.6.33-rc1: kernel BUG at fs/ext4/inode.c:1063 (sparc) It seems Dmitry Torokhov has the same issue, Cc'ed. 2009/12/26 Dmitry Monakhov <dmonakhov@...nvz.org>: > Alexander Beregalov <a.beregalov@...il.com> writes: > >>>> It seems I can easily reproduce it. >>>> But I can't compile 2.6.33-rc2 :) > BTW what sha1 of the git-commit you have used to reproduce > the bug (2.6.33-rc1 HEAD has no this BUG_ON). > This is important to me to know it, or just post the > fs/ext4/inode.c file. It was in the first post - 2f99f5c There is only OCFS update between it and -rc2. >>>> >>>> scripts/kconfig/conf -s arch/sparc/Kconfig >>>> CHK include/linux/version.h >>>> CHK include/generated/utsrelease.h >>>> CALL scripts/checksyscalls.sh >>>> CHK include/generated/compile.h >>>> GZIP kernel/config_data.gz >>>> CC fs/configfs/inode.o >>>> IKCFG kernel/config_data.h >>>> LD [M] fs/btrfs/btrfs.o >>>> CC kernel/configs.o >>>> fs/btrfs/sysfs.o: file not recognized: File truncated >>> This happens because of delayed allocation. Each time BUG or >>> unexpected power off happens during object files usually becomes >>> broken. IMHO this is expected issue. Just recompile from beginning >>> # make clean; make -j4 >> >> It does not help, it still fails. > Again strange, please run fsck. What about compile it from very > beginning (start from unpacking tar-ball from kernel.org) > Or may be compile it on another file-system(ext3 or > ext4 with nodelalloc option) I tried fsck, it did not find any problem, kernel build still fails after it. >> I will try to crosscompile the kernel with Ted's patch on another host. Here is output of 2.6.33-rc2 plus Ted's patch EXT4-fs (sda1): inode #1387643: mdb_free (1) < mdb_claim (2) BUG ------------[ cut here ]------------ WARNING: at fs/ext4/inode.c:1067 ext4_get_blocks+0x3f0/0x440() Modules linked in: Call Trace: [0000000000456bb0] warn_slowpath_common+0x50/0xa0 [0000000000456c1c] warn_slowpath_null+0x1c/0x40 [0000000000545010] ext4_get_blocks+0x3f0/0x440 [0000000000545420] mpage_da_map_blocks+0x80/0x800 [0000000000546260] mpage_add_bh_to_extent+0x40/0x100 [00000000005464cc] __mpage_da_writepage+0x1ac/0x220 [00000000004a957c] write_cache_pages+0x19c/0x380 [0000000000545e1c] ext4_da_writepages+0x27c/0x680 [00000000004a97ec] do_writepages+0x2c/0x60 [00000000004f952c] writeback_single_inode+0xcc/0x3c0 [00000000004fa438] writeback_inodes_wb+0x338/0x500 [00000000004fa748] wb_writeback+0x148/0x220 [00000000004fab60] wb_do_writeback+0x240/0x260 [00000000004fabec] bdi_writeback_task+0x6c/0xc0 [00000000004b6fb0] bdi_start_fn+0x70/0xe0 [000000000047036c] kthread+0x6c/0x80 ---[ end trace 46a56c443941c84d ]--- >> > It is sad, but i still can not reproduce your bug. > At this time i've tested following configurations: > system : 2.6.33-rc2, x86 two cores cpu with 2GB of ram > block dev: real sata drive, loopdev over tmpfs > mkfs : 4k and 1k blocksize > mount : w/o quota, quota, journaled quota > quota : both ON and OFF states > fs-load : - fsstress with 1,4,16,32 concurrent tasks > - kernel compilation -j4, -j32 > - In fact currently my mail-dir is under quota control. > Please clarify your use-case: > 0) Your system speciffication: cpu_num, mem_size, page_size(i guess 8k) > block device. UltraSparc IIe, UP, 2Gb, 8kb, real SCSI disk (sym53c8xx driver) > 1) mkfs options I do not remember. Perhaps dumpe2fs can help root@...0 ~ # dumpe2fs -h /dev/sda1 dumpe2fs 1.41.9 (22-Aug-2009) Filesystem volume name: <none> Last mounted on: / Filesystem UUID: b34f302e-78a3-4f80-bae6-31639456216c Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 2113536 Block count: 8448000 Reserved block count: 422400 Free blocks: 6661110 Free inodes: 1861302 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 1021 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 Filesystem created: Tue Nov 10 00:44:17 2009 Last mount time: Sun Dec 27 20:05:48 2009 Last write time: Sat Dec 26 10:59:00 2009 Mount count: 3 Maximum mount count: 21 Last checked: Sat Dec 26 06:07:50 2009 Check interval: 15552000 (6 months) Next check after: Thu Jun 24 07:07:50 2010 Lifetime writes: 30 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: ae1ec2f1-0f86-4f26-ace5-eb656fd25709 Journal backup: inode blocks Journal size: 128M > 2) mount options noatime > 3) quota options (if any) No > 4) your fs load test-case Have not tried to find a simpler testcase yet. make CROSS_COMPILE="ccache sparc64-unknown-linux-gnu-" -j4 zImage modules Hm, perhaps ccache is the real trigger of the problem. > 5) How long does it takes you to reproduce the bug. Few seconds (~5) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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