Jan Kiszka wrote:
> Sean McGranaghan wrote:
> > FYI,
> >
> > Just following up on my crash issue from a couple weeks ago. It appears
> > that
> > disabling the local APIC in the kernel fixed my crash. I have a complete
> > dump of
> > the console messages before the crash and two kernel config files
> > attached. The
> > only difference in the config files is the APIC settings.
> >
> > My test system is an older PII 350MHz with 512M. The vanilla kernel boots
> > fine
> > with APIC support enabled, but when the Xenomai patches are applied I get
> > the crash.
> >
> > Also, this may be in the release notes but I wanted to mention it anyway.
> > I
> > noticed that the valid return values for an RTDM interrupt handler have
> > changed
> > between Xenomai 2.0 and 2.1. I have a driver I wrote in 2.0.92 that fails
> > to
> > compile under 2.1. It looks like the valid return code have changed as
> > follows:
> >
> > Xenomai 2.0.92
> > RTDM_IRQ_PROPAGATE
> > RTDM_IRQ_ENABLE
> >
> > Xenomai 2.1
> > RTDM_IRQ_NONE
> > RTDM_IRQ_HANDLED
> >
> > When an interrupt handler now returns RTDM_IRQ_HANDLED I assume it will be
> > re-enabled, is this true?
>
> That's true, and it should be described, see RTDM API docs and
> ksrc/skins/rtdm/API.CHANGES. The upgrade is straightforward:
>
> old -> new
>
> 0 -> RTDM_IRQ_NONE
> RTDM_IRQ_ENABLE -> RTDM_IRQ_HANDLED
> RTDM_IRQ_PROPAGATE -> -unsupported-
>
> > Linux version 2.6.15.6-ipipe ([EMAIL PROTECTED]) (gcc version 4.0.2
> > 20051125 (Red Hat 4.0.2-8)) #3 Thu Mar 23 11:45:02 EST 2006
> > BIOS-provided physical RAM map:
> > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> > BIOS-e820: 0000000000100000 - 000000001fffd000 (usable)
> > BIOS-e820: 000000001fffd000 - 000000001ffff000 (ACPI data)
> > BIOS-e820: 000000001ffff000 - 0000000020000000 (ACPI NVS)
> > BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
> > 0MB HIGHMEM available.
> > 511MB LOWMEM available.
> > DMI 2.0 present.
> > Allocating PCI resources starting at 30000000 (gap: 20000000:dfff0000)
> > Built 1 zonelists
> > Kernel command line: ro root=LABEL=/ console=ttyS0,115200n8
> > Local APIC disabled by BIOS -- you can enable it with "lapic"
>
> You may either follow this suggestion or actually leave local APIC off
> at compile time.
>
> > Initializing CPU#0
> > CPU 0 irqstacks, hard=c0414000 soft=c0413000
> > PID hash table entries: 2048 (order: 11, 32768 bytes)
> > Detected 350.905 MHz processor.
> > Using tsc for high-res timesource
> > I-pipe 1.2-01: pipeline enabled.
> > Console: colour VGA+ 80x25
> > Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
> > Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
> > Memory: 514088k/524276k available (2222k kernel code, 9656k reserved, 730k
> > data, 168k init, 0k highmem)
> > Checking if this processor honours the WP bit even in supervisor mode...
> > Ok.
> > Calibrating delay using timer specific routine.. 702.33 BogoMIPS
> > (lpj=351169)
> > Security Framework v1.0.0 initialized
> > SELinux: Initializing.
> > SELinux: Starting in permissive mode
> > selinux_register_security: Registering secondary module capability
> > Capability LSM initialized as secondary
> > Mount-cache hash table entries: 512
> > CPU: L1 I cache: 16K, L1 D cache: 16K
> > CPU: L2 cache: 512K
> > Intel machine check architecture supported.
> > Intel machine check reporting enabled on CPU#0.
> > mtrr: v2.0 (20020519)
> > CPU: Intel Pentium II (Deschutes) stepping 02
> > Enabling fast FPU save and restore... done.
> > Checking 'hlt' instruction... OK.
> > checking if image is initramfs... it is
> > Freeing initrd memory: 1070k freed
> > NET: Registered protocol family 16
> > PCI: PCI BIOS revision 2.10 entry at 0xf0720, last bus=1
> > PCI: Using configuration type 1
> > Linux Plug and Play Support v0.97 (c) Adam Belay
> > SCSI subsystem initialized
> > usbcore: registered new driver usbfs
> > usbcore: registered new driver hub
> > PCI: Probing PCI hardware
> > PCI quirk: region e400-e43f claimed by PIIX4 ACPI
> > PCI quirk: region e800-e80f claimed by PIIX4 SMB
> > PIIX4 devres B PIO at 0290-0297
> > PCI: Using IRQ router PIIX/ICH [8086/7110] at 0000:00:04.0
> > PCI: IRQ 0 for device 0000:00:04.2 doesn't match PIRQ mask - try
> > pci=usepirqmask
> > PCI: Bridge: 0000:00:01.0
> > IO window: disabled.
> > MEM window: e0000000-e1dfffff
> > PREFETCH window: e1f00000-e3ffffff
> > audit: initializing netlink socket (disabled)
> > audit(1143117255.879:1): initialized
> > Xenomai: Local APIC absent or disabled!
> > Disable APIC support or pass "lapic=1" as bootparam.
> > Xenomai: system init failed, code -19.
>
> This is normal, given the lacking "lapic=1".
>
> > divide error: 0000 [#1]
> > Modules linked in:
> > CPU: 0
> > EIP: 0060:[<c014243a>] Not tainted VLI
> > EFLAGS: 00010246 (2.6.15.6-ipipe)
> > EIP is at xntimer_get_jiffies_aperiodic+0x5a/0xf0
>
> This is not ok, but should be easy to fix.
I am able to reproduce that bug, trying to fix...
--
Gilles Chanteperdrix.
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