linux-kernel - Re: oops when using git gc --auto

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Date:	Wed, 27 Feb 2008 00:33:31 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Otavio Salvador <otavio@...ian.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: oops when using git gc --auto

On Wednesday 27 February 2008 00:22, Otavio Salvador wrote:
> Hello,
>
> Today I got this oops, someone has an idea of what's going wrong?
>
> Unable to handle kernel paging request at 0000020000000000 RIP:
>  [<ffffffff802735c3>] find_get_pages+0x3c/0x69

At this point, the most likely candidate is a memory corruption
error, probably hardware. Can you run memtest86 for a few hours
to get a bit more confidence in the hw (preferably overnight)?

I did recently see another quite similar corruption in the
pagecache radix-tree, though. Coincidence maybe?

> PGD 0
> Oops: 0000 [1] SMP
> CPU 3
> Modules linked in: sha256_generic aes_generic aes_x86_64 cbc blkcipher
> nvidia(P) rfcomm l2cap bluetooth ac battery ipv6 nfs lockd nfs_acl sunrpc
> bridge ext2 mbcache dm_crypt tun kvm_intel kvm loop snd_usb_audio
> snd_usb_lib snd_rawmidi snd_hda_intel e1000e i2c_i801 serio_raw
> snd_seq_device snd_pcm intel_agp button snd_timer pcspkr psmouse snd_hwdep
> snd snd_page_alloc soundcore evdev i2c_core xfs dm_mirror dm_snapshot
> dm_mod raid0 md_mod sg sr_mod cdrom sd_mod usbhid hid usb_storage
> pata_marvell floppy ahci ata_generic libata scsi_mod ehci_hcd uhci_hcd
> thermal processor fan Pid: 15684, comm: git Tainted: P       
> 2.6.24-1-amd64 #1
> RIP: 0010:[<ffffffff802735c3>]  [<ffffffff802735c3>]
> find_get_pages+0x3c/0x69 RSP: 0018:ffff8100394dfd98  EFLAGS: 00010097
> RAX: 0000000000000009 RBX: 000000000000000e RCX: 0000000000000009
> RDX: 0000020000000000 RSI: 000000000000000a RDI: 0000000000000040
> RBP: ffff810042964350 R08: 0000000000000040 R09: 000000000000000a
> R10: ffff8100425a06c8 R11: 000000000000000a R12: 000000000000000e
> R13: ffff8100394dfdf8 R14: ffff810042964350 R15: 0000000000000000
> FS:  00002ae326df2190(0000) GS:ffff81007d7aeb40(0000)
> knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000020000000000 CR3: 00000000358f9000 CR4: 00000000000026e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process git (pid: 15684, threadinfo ffff8100394de000, task
> ffff8100359cd800) Stack:  000000000000000d ffff8100394dfde8
> 000000000000000d 000000000000000e 000000000000000e ffffffff802794d6
> ffff8100014a7768 ffffffff80279b04 0000000000000000 ffffffffffffffff
> 0000000000000000 0000000000000000 Call Trace:
>  [<ffffffff802794d6>] pagevec_lookup+0x17/0x1e
>  [<ffffffff80279b04>] truncate_inode_pages_range+0x108/0x2bd
>  [<ffffffff802a9e3a>] generic_delete_inode+0xbf/0x127
>  [<ffffffff802a1a4d>] do_unlinkat+0xd5/0x144
>  [<ffffffff802989e2>] sys_write+0x45/0x6e
>  [<ffffffff8020be2e>] system_call+0x7e/0x83
>
>
> Code: 48 8b 02 25 00 40 02 00 48 3d 00 40 02 00 75 04 48 8b 52 10
> RIP  [<ffffffff802735c3>] find_get_pages+0x3c/0x69
>  RSP <ffff8100394dfd98>
> CR2: 0000020000000000
> ---[ end trace cb43a9f4488b815a ]---

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