Re: 2.6.14-rc1-git-now still dying in mm/slab - this time line 1849

[Petr Vandrovec <vandrove@vc.cvut.cz>]

Petr Vandrovec wrote:
> Hello,
>   so now once crashes on UP system were sorted out, I tried to
> put new kernel on my SMP host - and sorry to say, but it does not
> seem to work as advertised :-(  It seems that we somehow got
> blocks from CPU#1 into memory blocks on CPU#0, and free_block
> complains that caller holds cachep->nodelists[0]->list_lock
> while nodeid for block passed to free_block() comes from processor
> (and node) #1...
> 
>   I cannot find how this happened.  Hopefully somebody else
> will know...  Meanwhile I'll try to get rid of PREEMPT, apparently
> although it is now masqueraded under 'Low-latency desktop' it
> is still somewhat dangerous.  If it is triggered by preempt, that is.

It is not caused by preempt, non-preempt kernel crashes exactly same
way.
								Petr

>                         Thanks,
>                             Petr Vandrovec
> 
> 
> ttyS0 at I/O 0x3f8 (irq = 0) is a 16550A
> ttyS1 at I/O 0x2f8 (irq = 0) is a 16550A
> ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> parport: PnPBIOS parport detected.
> parport0: PC-style at 0x378 (0x778), irq 7, dma 3 
> [PCSPP,TRISTATE,COMPAT,EPP,ECP,DMA]
> io scheduler noop registered
> io scheduler anticipatory registered
> io scheduler deadline registered
> io scheduler cfq registered
> pktcdvd: v0.2.0a 2004-07-14 Jens Axboe (axboe@suse.de) and 
> petero2@telia.com
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> AMD8111: IDE controller at PCI slot 0000:00:07.1
> AMD8111: chipset revision 3
> AMD8111: not 100% native mode: will probe irqs later
> AMD8111: 0000:00:07.1 (rev 03) UDMA133 controller
>     ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
>     ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
> ----------- [cut here ] --------- [please bite here ] ---------
> Kernel BUG at mm/slab.c:1849
> invalid operand: 0000 [1] PREEMPT SMP
> CPU 0
> Modules linked in:
> Pid: 8, comm: events/0 Not tainted 2.6.14-rc1-1619 #1
> RIP: 0010:[<ffffffff8016e826>] <ffffffff8016e826>{free_block+294}
> RSP: 0000:ffff81007ff21d88  EFLAGS: 00010002
> RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000310
> RDX: 0000000000000000 RSI: ffff81007ffddd10 RDI: ffff81007ffda080
> RBP: ffff81007ffde000 R08: ffff81003ffaed90 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000000 R12: ffff81007ffc9b50
> R13: ffff81007ffde048 R14: ffff81007ffda080 R15: ffff81007ffda080
> FS:  0000000000000000(0000) GS:ffffffff805fb800(0000) 
> knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 0000000000000000 CR3: 0000000000101000 CR4: 00000000000006e0
> Process events/0 (pid: 8, threadinfo ffff81007ff20000, task 
> ffff81003ff8c790)
> Stack: 0000000000000000 0000000000000000 0000000000000213 0000000200000000
>        ffff81007ffddd10 ffff81007ffddd10 ffff81007ffddce8 0000000000000002
>        0000000000000000 ffff81007ffda080
> Call Trace:<ffffffff8016fdc7>{drain_array_locked+167} 
> <ffffffff8016feee>{cache_reap+206}
>        <ffffffff803a2374>{_spin_lock_irqsave+36} 
> <ffffffff8016fe20>{cache_reap+0}
>        <ffffffff8014a1bc>{worker_thread+476} 
> <ffffffff80132610>{default_wake_function+0}
>        <ffffffff80132610>{default_wake_function+0} 
> <ffffffff80149fe0>{worker_thread+0}
>        <ffffffff8014ebc2>{kthread+146} <ffffffff8010ed12>{child_rip+8}
>        <ffffffff80149fe0>{worker_thread+0} <ffffffff8014eb30>{kthread+0}
>        <ffffffff8010ed0a>{child_rip+0}
> 
> Code: 0f 0b 68 bd aa 3d 80 c2 39 07 48 89 ee 4c 89 ff 4c 8d 75 30
> RIP <ffffffff8016e826>{free_block+294} RSP <ffff81007ff21d88>
>  <6>note: events/0[8] exited with preempt_count 1
> hda: _NEC DVD_RW ND-3500AG, ATAPI CD/DVD-ROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> Probing IDE interface ide1...
> hdc: WDC WD1200JB-00CRA0, ATA DISK drive
> ide1 at 0x170-0x177,0x376 on irq 15
> hdc: max request size: 128KiB
> hdc: 234441648 sectors (120034 MB) w/8192KiB Cache, CHS=65535/16/63, 
> UDMA(100)
> hdc: cache flushes not supported
>  hdc: hdc1
> libata version 1.12 loaded.
> sata_sil version 0.9
> ACPI: PCI Interrupt 0000:01:0b.0[A] -> GSI 17 (level, low) -> IRQ 177
> <and box is dead>
> 
> -
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