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    SubjectRe: 2.6.24-sha1: RIP [<ffffffff802596c8>] iov_iter_advance+0x38/0x70
    On Feb 18, 2008 8:20 PM, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
    > On Wednesday 13 February 2008 09:27, Alexey Dobriyan wrote:
    > > On Tue, Feb 12, 2008 at 02:04:30PM -0800, Andrew Morton wrote:
    >
    > Can you try this patch please?

    Sorry, I still see (only with DEBUG_PAGEALLOC enabled):

    kernel: BUG: unable to handle kernel paging request at ffff81006a509008
    kernel: IP: [<ffffffff80268313>] iov_iter_advance+0x4f/0x67
    kernel: PGD 8063 PUD a063 PMD 6a400163 PTE 800000006a509160
    kernel: Oops: 0000 [1] SMP DEBUG_PAGEALLOC
    kernel: CPU 1
    kernel: Modules linked in: i915 drm nfsd exportfs autofs4 hidp l2cap
    bluetooth cbc crypto_blkcipher nfs lockd nfs_acl rpcsec_gss_krb5
    auth_rpcgss des_generic sunrpc ipv6 nf_conntrack_netbios_ns ipt_REJECT
    nf_conntrack_ipv4 xt_state nf_conntrack xt_tcpudp iptable_filter
    ip_tables x_tables cpufreq_ondemand acpi_cpufreq dm_mirror
    dm_multipath dm_mod video output sbs sbshc dock battery ac
    snd_hda_intel snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
    snd_seq_device snd_pcm_oss snd_mixer_oss sr_mod snd_pcm snd_timer
    cdrom snd serio_raw button ohci1394 ieee1394 pcspkr i2c_i801 i2c_core
    soundcore snd_page_alloc r8169 iTCO_wdt iTCO_vendor_support sg ahci
    ata_piix libata sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
    [last unloaded: scsi_wait_scan]
    kernel: Pid: 2299, comm: nfsd Not tainted 2.6.25-rc1 #46
    kernel: RIP: 0010:[<ffffffff80268313>] [<ffffffff80268313>]
    iov_iter_advance+0x4f/0x67
    kernel: RSP: 0018:ffff810073c4d8a8 EFLAGS: 00010246
    kernel: RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000000
    kernel: RDX: 0000000000000000 RSI: 0000000000001000 RDI: ffff810073c4d940
    kernel: RBP: 0000000000001000 R08: 0000000000000000 R09: ffff81006a509000
    kernel: R10: 0000000000001000 R11: 6a6a6a6a6a6a6a6a R12: 0000000000ef7000
    kernel: R13: 0000000000001000 R14: ffff810073c4d940 R15: 0000000000007000
    kernel: FS: 00007f1898ea86f0(0000) GS:ffff81007e3b99c0(0000)
    knlGS:0000000000000000
    kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    kernel: CR2: ffff81006a509008 CR3: 000000007b1e2000 CR4: 00000000000006e0
    kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    kernel: Process nfsd (pid: 2299, threadinfo ffff810073c4c000, task
    ffff81007c62f500)
    kernel: Stack: ffffffff8026999b ffff8100698a9500 ffff810073c4d970
    ffff81006a5b65b0
    kernel: ffff8100698a9658 0000000100000014 ffff810073c4db50 0000000000ef0000
    kernel: ffff810073c4dad0 ffff81007d84fe80 ffff8100698a9658 ffffffff88042bc0
    kernel: Call Trace:
    kernel: [<ffffffff8026999b>] ? generic_file_buffered_write+0x1dc/0x631
    kernel: [<ffffffff80237fcb>] ? current_fs_time+0x1e/0x24
    kernel: [<ffffffff80222ec7>] ? __change_page_attr_set_clr+0x57/0xaf
    kernel: [<ffffffff8026a12f>] ? __generic_file_aio_write_nolock+0x33f/0x3a9
    kernel: [<ffffffff8026a1fa>] ? generic_file_aio_write+0x61/0xc1
    kernel: [<ffffffff880322fa>] ? :ext3:ext3_file_write+0x16/0x94
    kernel: [<ffffffff880322e4>] ? :ext3:ext3_file_write+0x0/0x94
    kernel: [<ffffffff80290443>] ? do_sync_readv_writev+0xc0/0x107
    kernel: [<ffffffff802454b6>] ? autoremove_wake_function+0x0/0x2e
    kernel: [<ffffffff802902d9>] ? rw_copy_check_uvector+0x6c/0xdc
    kernel: [<ffffffff80290af6>] ? do_readv_writev+0xb2/0x18b
    kernel: [<ffffffff8841048a>] ? :exportfs:find_acceptable_alias+0x1a/0xe2
    kernel: [<ffffffff884105fb>] ? :exportfs:exportfs_decode_fh+0xa9/0x1de
    kernel: [<ffffffff88417c2d>] ? :nfsd:nfsd_acceptable+0x0/0xd3
    kernel: [<ffffffff88418bf6>] ? :nfsd:nfsd_vfs_write+0xe9/0x2dd
    kernel: [<ffffffff8023fad7>] ? set_current_groups+0x156/0x161
    kernel: [<ffffffff8841dfc1>] ? :nfsd:nfsd_setuser+0x116/0x201
    kernel: [<ffffffff88419483>] ? :nfsd:nfsd_write+0x79/0xe2
    kernel: [<ffffffff8842329a>] ? :nfsd:nfsd4_write+0xd0/0xfc
    kernel: [<ffffffff88423833>] ? :nfsd:nfsd4_proc_compound+0x1ad/0x2b9
    kernel: [<ffffffff88415245>] ? :nfsd:nfsd_dispatch+0xde/0x1b6
    kernel: [<ffffffff8832b25e>] ? :sunrpc:svc_process+0x3f0/0x6e2
    kernel: [<ffffffff8841567c>] ? :nfsd:nfsd+0x0/0x2c0
    kernel: [<ffffffff8841581f>] ? :nfsd:nfsd+0x1a3/0x2c0
    kernel: [<ffffffff8022f1d1>] ? schedule_tail+0x28/0x5d
    kernel: [<ffffffff8020cc18>] ? child_rip+0xa/0x12
    kernel: [<ffffffff8841567c>] ? :nfsd:nfsd+0x0/0x2c0
    last message repeated 2 times
    kernel: [<ffffffff8020cc0e>] ? child_rip+0x0/0x12
    kernel:
    kernel:
    kernel: Code: eb 24 49 8b 51 08 48 89 d0 48 29 c8 4c 39 c0 49 0f 47 c0
    48 98 48 01 c1 48 39 ca 75 06 49 83 c1 10 31 c9 49 29 c0 4d 85 c0 75
    d7 <49> 83 79 08 00 75 05 4d 85 d2 75 cb 4c 89 0f 48 89 4f 10 48 29
    kernel: RIP [<ffffffff80268313>] iov_iter_advance+0x4f/0x67
    kernel: RSP <ffff810073c4d8a8>
    kernel: CR2: ffff81006a509008
    kernel: ---[ end trace 0ce02d00f5455fd8 ]---


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