Hey folks,
 I've recently compiled and installed Xen 4.1 on a machine running
RHEL 5.4. Unfortunately when booting via Xen there's an IRQ conflict
which prevents dom0 from loading the SATA drivers. This is followed by
a kernel panic because LVM can't find the root volume.
This is the salient bit from the boot log:
ahci .&checktime(0000,00,1,':')f.2: AHCI 0001.0200 32 slots 4 ports 1.5 Gbps 0xf impl SATA mode
ahci .&checktime(0000,00,1,':')f.2: flags: 64bit ncq sntf stag pm led clo pmp pio slum part ems
IRQ handler type mismatch for IRQ 275
Call Trace:
 [<ffffffff802b595d>] setup_irq+0x1b7/0x1cf
 [<ffffffff880ec18e>] :ahci:ahci_interrupt+0x0/0x644
 [<ffffffff802b5a25>] request_irq+0xb0/0xd6
 [<ffffffff802b686c>] devm_request_irq+0x5d/0x92
 [<ffffffff880ec18e>] :ahci:ahci_interrupt+0x0/0x644
 [<ffffffff880bb780>] :libata:ata_host_activate+0x97/0xf1
 [<ffffffff880ec078>] :ahci:ahci_init_one+0xa2c/0xa5e
 [<ffffffff80352b1e>] pci_device_probe+0x4c/0x75
 [<ffffffff803b882c>] pci_bus_probe_wrapper+0x80/0x89
 [<ffffffff80352a07>] pci_match_device+0x13/0xbe
 [<ffffffff80352ac6>] pci_bus_match+0x14/0x20
 [<ffffffff803b1266>] driver_probe_device+0x52/0xaa
 [<ffffffff803b1395>] __driver_attach+0x65/0xb6
 [<ffffffff803b1330>] __driver_attach+0x0/0xb6
 [<ffffffff803b0b6d>] bus_for_each_dev+0x43/0x6e
 [<ffffffff803b07a9>] bus_add_driver+0x76/0x110
 [<ffffffff80352de2>] __pci_register_driver+0x51/0xa6
 [<ffffffff802a4380>] sys_init_module+0xaf/0x1f2
 [<ffffffff80260106>] system_call+0x86/0x8b
 [<ffffffff80260080>] system_call+0x0/0x8b
ahci: probe of .&checktime(0000,00,1,':')f.2 failed with error -16
[...]
Activating logical volumes
 Volume group "sys" not found
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
[...]
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
 (XEN) Domain 0 crashed: rebooting machine in 5 seconds.
I've tried fiddling with some kernel settings like irqpoll, noapic,
turning off acpi. But to no avail.
grub.conf:
title Red Hat Enterprise Linux Server Supertaco 4.x (2.6.18-164.el5xen)
 root (hd0,0)
 kernel /xen-4.1.0.gz dom0_mem=1024M dom0_max_vcpus=0 console=com1
com1=9600,8n1
 module /vmlinuz-2.6.18-238.el5xen ro root=/dev/sys/root
hda=noprobe panic=5 console=ttyS0,9600
 module /initrd-2.6.18-238.el5xen.img
Now, i've tried RHEL 5.3 and RHEL 5.6. Running 2.6.18-164.el5xen and
2.6.18-238.el5xen. Things work fine when I use Xen-3.1.2
Anyone have any suggestions on how to make Xen-4.1 play nice with the
IRQs for my SATA driver?R
thanks!
-James
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