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Subject[origin tree boot failure] Re: [GIT PULL] core block bits for 2.6.37-rc1

Hi,

* Jens Axboe <jaxboe@fusionio.com> wrote:

> Hi Linus,
>
> This first pull request is the core bits, meaning general
> block layer changes or core support. Should be clean this time,
> only 'weird bit' is the seemingly duplicate entry from Malahal.
> This is caused by the first patch being buggy (and later
> reverted), second patch used the same single line description.
>
> Nothing really exciting in here. A good collection of fixes, some of
> which are marked for stable as well.
>
> The biggest addition this time around is the block IO throttling support
> from Vivek.

The upstream block bits pulled in this merge window (or maybe the workqueue bits)
are possibly the cause a boot crash on today's -tip, using a trivial x86 bootup test
(64-bit allyesconfig):

[ 116.064281] calling hd_init+0x0/0x302 @ 1
[ 116.068529] hd: no drives specified - use hd=cyl,head,sectors on kernel command line
[ 116.076334] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 116.080274] last sysfs file:
[ 116.080274] CPU 0
[ 116.080274] Modules linked in:
[ 116.080274]
[ 116.080274] Pid: 1, comm: swapper Tainted: G W 2.6.36-tip-03555-g825d9ec-dirty #51843 A8N-E/System Product Name
[ 116.080274] RIP: 0010:[<ffffffff81064380>] [<ffffffff81064380>] __ticket_spin_trylock+0x4/0x21
[ 116.080274] RSP: 0018:ffff88003c417c10 EFLAGS: 00010082
[ 116.080274] RAX: ffff88003c418000 RBX: 6b6b6b6b6b6b6b6a RCX: 0000000000000000
[ 116.080274] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 6b6b6b6b6b6b6b6a
[ 116.080274] RBP: ffff88003c417c10 R08: 0000000000000002 R09: 0000000000000001
[ 116.080274] R10: 0000000000000286 R11: ffff880032498738 R12: 6b6b6b6b6b6b6b82
[ 116.080274] R13: 0000000000000286 R14: 6b6b6b6b6b6b6b6b R15: 0000000000000001
[ 116.080274] FS: 0000000000000000(0000) GS:ffff88003e200000(0000) knlGS:0000000000000000
[ 116.080274] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 116.080274] CR2: 0000000000000000 CR3: 0000000004071000 CR4: 00000000000006f0
[ 116.080274] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 116.080274] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 116.080274] Process swapper (pid: 1, threadinfo ffff88003c416000, task ffff88003c418000)
[ 116.080274] Stack:
[ 116.080274] ffff88003c417c30 ffffffff8168c6ee 6b6b6b6b6b6b6b6b 6b6b6b6b6b6b6b6a
[ 116.080274] <0> ffff88003c417c70 ffffffff82d37a20 ffffffff810a1b65 ffff88003c418000
[ 116.080274] <0> ffffffff82d3836b 6b6b6b6b6b6b6b6a ffff8800330fcc20 ffff88003c417cb8
[ 116.080274] Call Trace:
[ 116.080274] [<ffffffff8168c6ee>] do_raw_spin_trylock+0x1f/0x41
[ 116.080274] [<ffffffff82d37a20>] _raw_spin_lock_irqsave+0x72/0xa4
[ 116.080274] [<ffffffff810a1b65>] ? lock_timer_base+0x2c/0x52
[ 116.080274] [<ffffffff82d3836b>] ? _raw_spin_unlock_irqrestore+0x55/0x72
[ 116.080274] [<ffffffff810a1b65>] lock_timer_base+0x2c/0x52
[ 116.080274] [<ffffffff810a1c43>] del_timer+0x2f/0x82
[ 116.080274] [<ffffffff810ac906>] ? wait_on_work+0x0/0xdb
[ 116.080274] [<ffffffff810aca18>] __cancel_work_timer+0x37/0x130
[ 116.080274] [<ffffffff810acb23>] cancel_delayed_work_sync+0x12/0x14
[ 116.080274] [<ffffffff8166974a>] throtl_shutdown_timer_wq+0x1c/0x1e
[ 116.080274] [<ffffffff8165dbec>] blk_sync_queue+0x3d/0x41
[ 116.080274] [<ffffffff8165f872>] blk_release_queue+0x1e/0x6a
[ 116.080274] [<ffffffff81673ce3>] kobject_release+0xf4/0x122
[ 116.080274] [<ffffffff81673bef>] ? kobject_release+0x0/0x122
[ 116.080274] [<ffffffff81674e7e>] kref_put+0x43/0x4d
[ 116.080274] [<ffffffff81673b46>] kobject_put+0x47/0x4c
[ 116.080274] [<ffffffff8165dc53>] blk_cleanup_queue+0x63/0x68
[ 116.080274] [<ffffffff84883c80>] ? hd_init+0x0/0x302
[ 116.080274] [<ffffffff84883f54>] hd_init+0x2d4/0x302
[ 116.080274] [<ffffffff81910778>] ? device_pm_unlock+0x15/0x17
[ 116.080274] [<ffffffff84883c80>] ? hd_init+0x0/0x302
[ 116.080274] [<ffffffff81002062>] do_one_initcall+0x57/0x15a
[ 116.080274] [<ffffffff8482f78b>] kernel_init+0x194/0x222
[ 116.080274] [<ffffffff8103ad04>] kernel_thread_helper+0x4/0x10
[ 116.080274] [<ffffffff82d38710>] ? restore_args+0x0/0x30
[ 116.080274] [<ffffffff8482f5f7>] ? kernel_init+0x0/0x222
[ 116.080274] [<ffffffff8103ad00>] ? kernel_thread_helper+0x0/0x10
[ 116.080274] Code: ff ff c9 c3 90 90 90 55 b8 00 00 01 00 48 89 e5 f0 0f c1 07 0f b7 d0 c1 e8 10 39 c2 74 07 f3 90 0f b7 17 eb f5 c9 c3 55 48 89 e5 <8b> 07 89 c2 c1 c0 10 39 c2 8d 90 00 00 01 00 75 04 f0 0f b1 17
[ 116.080274] RIP [<ffffffff81064380>] __ticket_spin_trylock+0x4/0x21
[ 116.080274] RSP <ffff88003c417c10>
[ 116.080274] ---[ end trace e8df42e772bf6fed ]---
[ 116.080274] Kernel panic - not syncing: Fatal exception
[ 116.080274] Pid: 1, comm: swapper Tainted: G D W 2.6.36-tip-03555-g825d9ec-dirty #51843
[ 116.080274] Call Trace:
[ 116.080274] [<ffffffff82d34d9c>] panic+0x91/0x1b7
[ 116.080274] [<ffffffff81094c93>] ? kmsg_dump+0x18d/0x1a7
[ 116.080274] [<ffffffff82d38364>] ? _raw_spin_unlock_irqrestore+0x4e/0x72
[ 116.080274] [<ffffffff82d396af>] oops_end+0xd8/0xe8
[ 116.080274] [<ffffffff8103d6fd>] die+0x5a/0x63
[ 116.080274] [<ffffffff82d3924f>] do_general_protection+0x12a/0x132
[ 116.080274] [<ffffffff82d38740>] ? irq_return+0x0/0x10
[ 116.080274] [<ffffffff82d38965>] general_protection+0x25/0x30
[ 116.080274] [<ffffffff81064380>] ? __ticket_spin_trylock+0x4/0x21
[ 116.080274] [<ffffffff8168c6ee>] do_raw_spin_trylock+0x1f/0x41
[ 116.080274] [<ffffffff82d37a20>] _raw_spin_lock_irqsave+0x72/0xa4
[ 116.080274] [<ffffffff810a1b65>] ? lock_timer_base+0x2c/0x52
[ 116.080274] [<ffffffff82d3836b>] ? _raw_spin_unlock_irqrestore+0x55/0x72
[ 116.080274] [<ffffffff810a1b65>] lock_timer_base+0x2c/0x52
[ 116.080274] [<ffffffff810a1c43>] del_timer+0x2f/0x82
[ 116.080274] [<ffffffff810ac906>] ? wait_on_work+0x0/0xdb
[ 116.080274] [<ffffffff810aca18>] __cancel_work_timer+0x37/0x130
[ 116.080274] [<ffffffff810acb23>] cancel_delayed_work_sync+0x12/0x14
[ 116.080274] [<ffffffff8166974a>] throtl_shutdown_timer_wq+0x1c/0x1e
[ 116.080274] [<ffffffff8165dbec>] blk_sync_queue+0x3d/0x41
[ 116.080274] [<ffffffff8165f872>] blk_release_queue+0x1e/0x6a
[ 116.080274] [<ffffffff81673ce3>] kobject_release+0xf4/0x122
[ 116.080274] [<ffffffff81673bef>] ? kobject_release+0x0/0x122
[ 116.080274] [<ffffffff81674e7e>] kref_put+0x43/0x4d
[ 116.080274] [<ffffffff81673b46>] kobject_put+0x47/0x4c
[ 116.080274] [<ffffffff8165dc53>] blk_cleanup_queue+0x63/0x68
[ 116.080274] [<ffffffff84883c80>] ? hd_init+0x0/0x302
[ 116.080274] [<ffffffff84883f54>] hd_init+0x2d4/0x302
[ 116.080274] [<ffffffff81910778>] ? device_pm_unlock+0x15/0x17
[ 116.080274] [<ffffffff84883c80>] ? hd_init+0x0/0x302
[ 116.080274] [<ffffffff81002062>] do_one_initcall+0x57/0x15a
[ 116.080274] [<ffffffff8482f78b>] kernel_init+0x194/0x222
[ 116.080274] [<ffffffff8103ad04>] kernel_thread_helper+0x4/0x10
[ 116.080274] [<ffffffff82d38710>] ? restore_args+0x0/0x30
[ 116.080274] [<ffffffff8482f5f7>] ? kernel_init+0x0/0x222
[ 116.080274] [<ffffffff8103ad00>] ? kernel_thread_helper+0x0/0x10

(Note, the taint is there because there are a few other (unrelated and harmless)
warnings in the bootup.)

Previous -tip testing narrows the regression down to between d4429f6 and ab34c02.

Going back to d4429f6 it boots fine.

I've also Cc:-ed Tejun as workqueue bits were pulled in that commit range as well
and the crash is also in the workqueue code.

Thanks,

Ingo


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