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Date:	Mon, 10 Jun 2013 22:31:05 +0400
From:	Dmitry Monakhov <dmonakhov@...nvz.org>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: xfstests  shared/313 result in OOPS

On Mon, 10 Jun 2013 20:24:40 +0400, Dmitry Monakhov <dmonakhov@...nvz.org> wrote:
> 
> I've run shared/313 (posted here http://patchwork.ozlabs.org/patch/244297)
> And have got following bugon( BUG_ON(!PageLocked())
first bad commit it obvious though
>From 4e7ea81db53465ddd753678bc4cebf95369d0984 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@...e.cz>
Date: Tue, 4 Jun 2013 13:17:40 -0400
> 
> I think this also will be reproducible via shared/305
> Currently I try to bisect this issue.
> 
> ------------[ cut here ]------------
> kernel BUG at fs/ext4/inode.c:1458!
> invalid opcode: 0000 [#1] SMP 
> Modules linked in: dm_flakey tun cpufreq_ondemand acpi_cpufreq
> freq_table mperf coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel
> microcode sg xhci_hcd button sd_mod crc_t10dif aesni_intel ablk_helper
> cryptd lrw gf128mul glue_helper aes_x86_64 ahci libahci pata_acpi
> ata_generic dm_mirror dm_region_hash dm_log dm_mod
> CPU: 2 PID: 12142 Comm: hwflush-check Tainted: G        W    3.10.0-rc2+
> #78
> Hardware name:                  /DQ67SW, BIOS
> SWQ6710H.86A.0052.2011.0520.1802 05/20/2011
> task: ffff8801c8a6cdc0 ti: ffff8802296f2000 task.ti: ffff8802296f2000
> RIP: 0010:[<ffffffff81315cf7>]  [<ffffffff81315cf7>]
> mpage_release_unused_pages+0x197/0x280
> RSP: 0018:ffff8802296f3c08  EFLAGS: 00010202
> RAX: 0000000000000003 RBX: ffffea0004332ad8 RCX: 00000000001d025f
> RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff82136dc0
> RBP: ffff8802296f3ce8 R08: 0000000000000000 R09: 0000000000000001
> R10: 0000000000000001 R11: 0000000000000003 R12: 0000000000000002
> R13: ffff8802296f3c38 R14: 0000000000000000 R15: 0000000000000001
> FS:  00007f8c0dffb700(0000) GS:ffff88023d800000(0000)
> knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f8bac003000 CR3: 000000022a1a6000 CR4: 00000000000407e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Stack:
>  0000000000000000 ffff8802296f3c48 ffff8801a92d8aa0 0000000000000004
>  00000000000005e6 ffff8802296f3c48 0000000000000004 0000000000000000
>  ffffea0004332ad8 ffffea0004332b10 ffffea0004332b48 ffffea0006dd0000
> Call Trace:
>  [<ffffffff81193c47>] ? mempool_free_slab+0x17/0x20
>  [<ffffffff81193d55>] ? mempool_free+0xe5/0x100
>  [<ffffffff8127bca0>] ? bio_put+0xe0/0xf0
>  [<ffffffff8131bcc4>] ext4_da_writepages+0x684/0x910
>  [<ffffffff810f56be>] ? __lock_acquire+0x4fe/0x5c0
>  [<ffffffff811a3071>] do_writepages+0x51/0x70
>  [<ffffffff8118f464>] __filemap_fdatawrite_range+0x64/0x70
>  [<ffffffff810f5e4a>] ? __lock_rele [<ffffffff81270288>]
>  do_fsync+0x58/0xa0
>  [<ffffffff81270300>] SyS_fsync+0x10/0x20
>  [<ffffffff818d5c82>] system_call_fastpath+0x16/0x1b
> Code: 83 f7 01 44 89 fe e8 f9 56 e5 ff 49 63 c7 48 83 c0 02 48 8b 14 c5
> f0 f1 2a 82 48 83 c2 01 45 85 ff 48 89 14 c5 EXT4-fs (dm-1): mounted
> filesystem with ordered data mode. Opts: acl,user_xattr
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