Description of problem:
While copying a whole FC5 installed tree +data (aprox. 60Gb) from PATA to SATA
disk driven by sata_via stops responding (timeout):
   ata1: command 0xca timeout, stat 0x50 host_stat 0x24
   ata1: status=0x50 { DriveReady SeekComplete }
   sda: Current: sense key: No Sense
     Additional sense: No additional sense information
     Info fld=0x5aa8240

I changed SATA cable _and_ SATA HD (same model: Hitachi HDT722516DLA380): same
problem.

Version-Release number of selected component (if applicable):
kernel-smp-2.6.17-1.2157_FC5

How reproducible:
Steps to Reproduce:
1. Be sure that irqbalance is running (it was enabled my FC5 install)
   /etc/init.d/irqbalance start
2. switch to text console (for kernel msgs)
3. do some heavy I/O to SATA disk
   in my case was something like: rsync --sparse -HXavx /home/ /mnt/sata/home/
  
Actual results:
Stuck sata_via controller, dmesg shows:
  ata1: command 0xca timeout, stat 0x50 host_stat 0x24
  ata1: status=0x50 { DriveReady SeekComplete }
  sda: Current: sense key: No Sense
     Additional sense: No additional sense information
     Info fld=0x5aa8240

Expected results:
Finished copy, normal I/O operations.

IMPORTANT NOTE (workaround): if I stop irqbalance I cannot reproduce the problem
(about ~2hs trying by now), tip from:
   http://lkml.org/lkml/2006/7/29/2

Additional info:
# dmesg | egrep -i via (see "FIXUP" msgs)
PCI: Bypassing VIA 8237 APIC De-Assert Message
agpgart: Detected VIA P4M800CE chipset
PCI: VIA IRQ fixup for 0000:00:0f.1, from 255 to 9
VP_IDE: VIA vt8237 (rev 00) IDE UDMA133 controller on pci0000:00:0f.1
sata_via 0000:00:0f.0: version 1.1
sata_via 0000:00:0f.0: routed to hard irq line 11
scsi0 : sata_via
scsi1 : sata_via
via-rhine.c:v1.10-LK1.2.0-2.6 June-10-2004 Written by Donald Becker
eth2: VIA Rhine II at 0xf8122000, 00:16:ec:67:5d:bd, IRQ 193.
PCI: VIA IRQ fixup for 0000:00:10.0, from 10 to 1
PCI: VIA IRQ fixup for 0000:00:10.1, from 10 to 1
PCI: VIA IRQ fixup for 0000:00:10.2, from 11 to 1
PCI: VIA IRQ fixup for 0000:00:10.3, from 11 to 1
Netfilter messages via NETLINK v0.30.
via-rhine.c:v1.10-LK1.2.0-2.6 June-10-2004 Written by Donald Becker
eth0: VIA Rhine II at 0xf8122000, 00:16:ec:67:5d:bd, IRQ 193.
sata_via 0000:00:0f.0: version 1.1
sata_via 0000:00:0f.0: routed to hard irq line 11
scsi2 : sata_via
scsi3 : sata_via

# lspci
00:00.0 Host bridge: VIA Technologies, Inc. P4M800CE Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. P4M800CE Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. P4M800CE Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. P4M800CE Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. P4M800CE Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:08.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
00:09.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller
(rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
[KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237
AC97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 PRO]
(rev 01)
01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 PRO]
(Secondary) (rev 01)