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    Subjectkernel:Disabling IRQ #23
    Hi,
    yesterday evening I lost the ssh connection to my server,
    the last message was:

    > Message from syslogd@guest-195 at Jul 4 23:29:08 ...
    > kernel:Disabling IRQ #23

    I could not renew the connection. After a reboot I found the following
    messages in /var/log/messages (attached below)

    The server contains 10 harddisks
    - 2 SAS drives connected as SAS drives
    - 6 SATA drives connected via SAS, and
    - 2 SATA drives connected via SATA

    Do these messages point to a single harddisk as the source of the problem?


    > distribution
    Fedora 10 server

    > uname -a
    Linux guest-195.mpi-sb.mpg.de 2.6.27.24-170.2.68.fc10.x86_64 #1 SMP Wed
    May 20 22:47:23 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

    > cat /var/log/messages
    # at this point I lost the ssh connection to the server
    Jul 4 23:29:08 guest-195 kernel: irq 23: nobody cared (try booting with
    the "irqpoll" option)
    Jul 4 23:29:08 guest-195 kernel: Pid: 0, comm: swapper Tainted:
    P 2.6.27.21-170.2.56.fc10.x86_64 #1
    Jul 4 23:29:08 guest-195 kernel:
    Jul 4 23:29:08 guest-195 kernel: Call Trace:
    Jul 4 23:29:08 guest-195 kernel: <IRQ> [<ffffffff81083523>]
    __report_bad_irq+0x38/0x7c
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff8108376f>]
    note_interrupt+0x208/0x26d
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff81083e9c>]
    handle_fasteoi_irq+0xbb/0xeb
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff810130ce>] do_IRQ+0xf7/0x169
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff81010963>]
    ret_from_intr+0x0/0x2e
    Jul 4 23:29:08 guest-195 kernel: <EOI> [<ffffffff810173a9>] ?
    mwait_idle+0x3e/0x4f
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff810173a0>] ?
    mwait_idle+0x35/0x4f
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff8100f2a7>] ? cpu_idle+0xb2/0x10b
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff8132e04b>] ?
    start_secondary+0x16e/0x173
    Jul 4 23:29:08 guest-195 kernel:
    Jul 4 23:29:08 guest-195 kernel: handlers:
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff812256e5>]
    (ata_sff_interrupt+0x0/0xc2)
    Jul 4 23:29:08 guest-195 kernel: [<ffffffff8123c306>]
    (usb_hcd_irq+0x0/0xb3)
    Jul 4 23:29:08 guest-195 kernel: Disabling IRQ #23
    Jul 4 23:29:39 guest-195 kernel: ata3.00: exception Emask 0x0 SAct 0x0
    SErr 0x0 action 0x6 frozen
    Jul 4 23:29:39 guest-195 kernel: ata3.00: cmd
    a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
    Jul 4 23:29:39 guest-195 kernel: cdb 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00
    Jul 4 23:29:39 guest-195 kernel: res
    40/00:02:00:08:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
    Jul 4 23:29:39 guest-195 kernel: ata3.00: status: { DRDY }
    Jul 4 23:29:39 guest-195 kernel: ata3: soft resetting link
    Jul 4 23:29:44 guest-195 kernel: ata3.01: qc timeout (cmd 0x27)
    Jul 4 23:29:44 guest-195 kernel: ata3.01: failed to read native max
    address (err_mask=0x4)
    Jul 4 23:29:44 guest-195 kernel: ata3.01: HPA support seems broken,
    skipping HPA handling
    Jul 4 23:29:44 guest-195 kernel: ata3.01: revalidation failed (errno=-5)
    Jul 4 23:29:44 guest-195 kernel: ata3: soft resetting link
    Jul 4 23:29:44 guest-195 kernel: ata3.00: configured for UDMA/100
    Jul 4 23:29:44 guest-195 kernel: ata3.01: configured for UDMA/133
    Jul 4 23:29:44 guest-195 kernel: ata3: EH complete

    # the log continues with the following message, repeated every 30 seconds...

    Jul 4 23:30:14 guest-195 kernel: ata3.00: exception Emask 0x0 SAct 0x0
    SErr 0x0 action 0x6 frozen
    Jul 4 23:30:14 guest-195 kernel: ata3.00: cmd
    a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
    Jul 4 23:30:14 guest-195 kernel: cdb 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00
    Jul 4 23:30:14 guest-195 kernel: res
    40/00:02:00:08:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
    Jul 4 23:30:14 guest-195 kernel: ata3.00: status: { DRDY }
    Jul 4 23:30:14 guest-195 kernel: ata3: soft resetting link
    Jul 4 23:30:14 guest-195 kernel: ata3.00: configured for UDMA/100
    Jul 4 23:30:14 guest-195 kernel: ata3.01: configured for UDMA/133
    Jul 4 23:30:14 guest-195 kernel: ata3: EH complete




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