Re: Ext4 stable yet?
On Fri, May 20, 2011 at 09:42:08AM +0200, Josip Rodin scribbled:
> On Thu, May 19, 2011 at 08:05:31PM -0400, Ivan Jager wrote:
> > [2267803.824160] EXT4-fs (dm-7): mounted filesystem with ordered data mode. Opts: (null)
> > [2299190.247232] ioctl32(resize2fs:9870): Unknown cmd fd(4) cmd(80186608){t:'f';sz:24} arg(ff96d008) on /mnt
> > [2323496.264729] BUG: NMI Watchdog detected LOCKUP on CPU1, ip 0042e1b0, registers:
>
> These could actually be completely separate events. The backtrace below did
> not indicate any calls from or to the ext4 filesystem code, not even
> something from the VFS code I don't think. It seems like just generic
> SPARC SMP code that failed while being called from the memory management
> code. (Ugly, that.)
It could be, although the system had been stable since before the
squeeze release, and it just crashed again now. Again both CPUs
are in kswapd. Is kswapd responsible for flushing dirty pages for
ext4? Because I have 7GB of memory and all that was really
running was a pair of rsyncs. Last night I wsa running a single
one, but I thought running two would improve throroughput
slightly, although with the crashes it's certainly worse.
> I would have now told you to file two bug reports on the
> linux-image-2.6.38-1-sparc64-smp package, but then I realized
> that you're using an old version. Please upgrade to
> linux-image-2.6.38-2-sparc64-smp first.
Yes, I will upgrade now. For what it's worth, here's the output
from the last crash:
---CUT HERE---
Debian GNU/Linux 6.0 luque ttyS0
luque login: [ 346.177806] EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: (null)
[ 7914.202563] BUG: NMI Watchdog detected LOCKUP on CPU1, ip 004398d8, registers:
[ 7914.297517] TSTATE: 0000004480e01602 TPC: 00000000004398d8 TNPC: 00000000004398dc Y: 00000000 Not tainted
[ 7914.426772] TPC: <cheetah_xcall_deliver+0x1b4/0x24c>
[ 7914.491941] g0: ffffffffffffffff g1: 00000000000186a0 g2: 0000000000000001 g3: fffffffffffffffe
[ 7914.606319] g4: fffff8003ff20000 g5: fffff800034c8000 g6: fffff8003ff28000 g7: 0000000000000000
[ 7914.720692] o0: 0000000000000001 o1: 0000000000000301 o2: 0000000000000000 o3: 0000000000000000
[ 7914.835064] o4: 0000000000000003 o5: 000000000001869f sp: fffff8003ff2abb1 ret_pc: 00000000004398f8
[ 7914.954012] RPC: <cheetah_xcall_deliver+0x1d4/0x24c>
[ 7915.019194] l0: 000000000000ffff l1: 0000000000000016 l2: fffff8003f82a040 l3: fffff8003f82a000
[ 7915.133574] l4: ffffffffffffffff l5: 0000000000000002 l6: 0000000000000001 l7: 0000000000000001
[ 7915.247945] i0: 000000000000ffff i1: 0000000000000001 i2: 0000000000000002 i3: 0000000000000040
[ 7915.362317] i4: 0000000000000050 i5: 0000000000000060 i6: fffff8003ff2ac71 i7: 00000000004394cc
[ 7915.476691] I7: <xcall_deliver+0xe4/0x10c>
[ 7915.530435] Call Trace:
[ 7915.562461] [00000000004394cc] xcall_deliver+0xe4/0x10c
[ 7915.632228] [0000000000439d68] smp_flush_tlb_pending+0x80/0x98
[ 7915.710006] [00000000004495b4] flush_tlb_pending+0x54/0x68
[ 7915.783207] [00000000004fec78] ptep_clear_flush+0x38/0x48
[ 7915.855253] [00000000004fa270] try_to_unmap_one+0xa0/0x404
[ 7915.928452] [00000000004fab54] try_to_unmap_file+0xb4/0x590
[ 7916.002791] [00000000004fb0f8] try_to_unmap+0x70/0x9c
[ 7916.070273] [0000000000510560] migrate_pages+0x1f0/0x378
[ 7916.141186] [0000000000507f30] compact_zone+0x42c/0x6fc
[ 7916.210948] [0000000000508334] compact_zone_order+0x94/0xa8
[ 7916.285296] [00000000004e57e8] kswapd+0x65c/0xa18
[ 7916.348202] [00000000004818c0] kthread+0x5c/0x70
[ 7916.409960] [000000000042af84] kernel_thread+0x30/0x48
[ 7916.478578] [00000000004819a8] kthreadd+0xd4/0x120
[ 7916.542623] Call Trace:
[ 7916.574653] [00000000004209f4] tl0_irq15+0x14/0x20
[ 7916.638700] [00000000004398d8] cheetah_xcall_deliver+0x1b4/0x24c
[ 7916.718760] [00000000004394cc] xcall_deliver+0xe4/0x10c
[ 7916.788528] [0000000000439d68] smp_flush_tlb_pending+0x80/0x98
[ 7916.866300] [00000000004495b4] flush_tlb_pending+0x54/0x68
[ 7916.939498] [00000000004fec78] ptep_clear_flush+0x38/0x48
[ 7917.011550] [00000000004fa270] try_to_unmap_one+0xa0/0x404
[ 7917.084749] [00000000004fab54] try_to_unmap_file+0xb4/0x590
[ 7917.159091] [00000000004fb0f8] try_to_unmap+0x70/0x9c
[ 7917.226569] [0000000000510560] migrate_pages+0x1f0/0x378
[ 7917.297480] [0000000000507f30] compact_zone+0x42c/0x6fc
[ 7917.367248] [0000000000508334] compact_zone_order+0x94/0xa8
[ 7917.441588] [00000000004e57e8] kswapd+0x65c/0xa18
[ 7917.504493] [00000000004818c0] kthread+0x5c/0x70
[ 7917.566254] [000000000042af84] kernel_thread+0x30/0x48
[ 7917.634879] [00000000004819a8] kthreadd+0xd4/0x120
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