Hello!

I installed a SL 5.7 x86_64 system and upgraded to latest packages
with yum. Then I install kernel-rt from CERN MRG repository with
adding repo files as recommended. I would like to play with MRG a bit.
The kernel shipped with SL 5.7 is 2.6.18-274.17.1.el5 and the MRG
kernel is 2.6.33.9-rt31.67.el5rt. When I use the system with kernel-rt
the network on motherboard crashed after a while giving the following
error message:

Jan 30 16:50:08 lrtest kernel: ------------[ cut here ]------------
Jan 30 16:50:08 lrtest kernel: WARNING: at net/sched/sch_generic.c:259
dev_watchdog+0x11d/0x193()
Jan 30 16:50:08 lrtest kernel: Hardware name:
Jan 30 16:50:08 lrtest kernel: NETDEV WATCHDOG: eth0 (e100): transmit
queue 0 timed out
Jan 30 16:50:08 lrtest kernel: Modules linked in: oprofile autofs4
lm85 hwmon_vid hwmon hidp l2cap crc16 bluetooth rfkill lockd sunrpc
dm_mirror dm_multipath scsi_dh video output sbs sbshc battery ac lp sg
sr_mod cdrom skge e100 mii snd_hda_codec_realtek snd_hda_intel
snd_hda_codec snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi_event
snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss serio_raw button
parport_pc parport floppy snd_pcm snd_timer tpm_tis tpm tpm_bios snd
i2c_i801 soundcore i2c_core snd_page_alloc pcspkr intel_agp shpchp
iTCO_wdt iTCO_vendor_support dm_region_hash dm_log dm_mod pata_acpi
ata_piix ata_generic libata sd_mod crc_t10dif scsi_mod ext3 jbd
mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: hwlat_detector]
Jan 30 16:50:08 lrtest kernel: Pid: 5, comm: sirq-timer/0 Not tainted
2.6.33.9-rt31.67.el5rt #1
Jan 30 16:50:08 lrtest kernel: Call Trace:
Jan 30 16:50:08 lrtest kernel:  [<ffffffff812d0f04>] ? dev_watchdog+0x11d/0x193
Jan 30 16:50:08 lrtest kernel:  [<ffffffff8104233f>]
warn_slowpath_common+0x7c/0x94
Jan 30 16:50:08 lrtest kernel:  [<ffffffff810423d6>] warn_slowpath_fmt+0x69/0x6b
Jan 30 16:50:08 lrtest kernel:  [<ffffffff81032918>] ? cpuacct_charge+0x5b/0x64
Jan 30 16:50:08 lrtest kernel:  [<ffffffff813565bf>] ?
_raw_spin_unlock+0x28/0x33
Jan 30 16:50:08 lrtest kernel:  [<ffffffff81356299>] ? rt_spin_lock+0x15/0x17
Jan 30 16:50:08 lrtest kernel:  [<ffffffff8135626b>] ? rt_spin_unlock+0x15/0x17
Jan 30 16:50:08 lrtest kernel:  [<ffffffff812d03e9>] ?
__netif_tx_unlock+0x1a/0x1c
Jan 30 16:50:08 lrtest kernel:  [<ffffffff812d0437>] ? netif_tx_lock+0x4c/0x64
Jan 30 16:50:08 lrtest kernel:  [<ffffffff812b956e>] ?
netdev_drivername+0x48/0x4f
Jan 30 16:50:08 lrtest kernel:  [<ffffffff812d0f04>] dev_watchdog+0x11d/0x193
Jan 30 16:50:08 lrtest kernel:  [<ffffffff8102f46a>] ? need_resched+0x23/0x2d
Jan 30 16:50:08 lrtest kernel:  [<ffffffff81050966>]
run_timer_softirq+0x1e9/0x2c3
Jan 30 16:50:08 lrtest kernel:  [<ffffffff812d0de7>] ? dev_watchdog+0x0/0x193
Jan 30 16:50:08 lrtest kernel:  [<ffffffff81048b18>] run_ksoftirqd+0x17e/0x29e
Jan 30 16:50:08 lrtest kernel:  [<ffffffff8104899a>] ? run_ksoftirqd+0x0/0x29e
Jan 30 16:50:08 lrtest kernel:  [<ffffffff8105daad>] kthread+0x6e/0x76
Jan 30 16:50:08 lrtest kernel:  [<ffffffff810373f8>] ?
finish_task_switch+0x62/0x81
Jan 30 16:50:08 lrtest kernel:  [<ffffffff81003a94>]
kernel_thread_helper+0x4/0x10
Jan 30 16:50:08 lrtest kernel:  [<ffffffff8105da3f>] ? kthread+0x0/0x76
Jan 30 16:50:08 lrtest kernel:  [<ffffffff81003a90>] ?
kernel_thread_helper+0x0/0x10
Jan 30 16:50:08 lrtest kernel: ---[ end trace 119d0fdfa1d74ba7 ]---

After error happens the system cannot access through terminal only
from net (system has three cards). Looks like getty freeze or hang.
When I try to shutdown/reboot the system it hangs at shutting down the
interface eth0. The motherboard is an Intel D915GUX with latest BIOS
EV91510A.86A.0482.2006.0222.2350. Now switch to non rt kernel hoping
that will be fine.

Anyone have similar experience? Any solution for this? Is it count
that system is generic SL and the MRG kernel is CERN SL?

Thanks,
a