Opened 17 years ago

Closed 15 years ago

#1578 closed bug (fixed)

Panic on boot (AHCI and/or VM related?)

Reported by: pieterpan Owned by: axeld
Priority: normal Milestone: R1
Component: System/Kernel Version: R1/pre-alpha1
Keywords: Cc: fredrik.holmqvist@…
Blocked By: Blocking:
Platform: All

Description

Using the latest revision (hrev22589) to test to see if #1417 was fixed. (it is, btw) Have a core2duo laptop with ahci. Unfortunately now I'm greeted with a PANIC. Maybe VM or AHCI related, but AHCI has worked well before. 

PANIC: vm_page_fault: unhandled page fault in kernel space at 0x31, ip 0x802c42c1

See attached bt. Sorry, no serial debug log, as the laptop doesn't have serial port.

Attachments (1)

DSC02056.JPG​ (279.1 KB ) - added by pieterpan 17 years ago.
back trace

Download all attachments as: .zip

Change History (11)

by pieterpan, 17 years ago

Attachment: DSC02056.JPG​ added

back trace

comment:1 by pieterpan, 17 years ago

Forgot to mention that it continues to boot if I enable console output

comment:2 by korli, 17 years ago

Component: - General → Drivers/Disk
Owner: changed from axeld to marcusoverhagen

comment:3 by marcusoverhagen, 17 years ago

Component: Drivers/Disk → System/Kernel
Owner: changed from marcusoverhagen to axeld

This appears to be the same cause as bug #1434 The device manager loads the driver and passes an invalid cookie pointer

comment:4 by korli, 17 years ago

Actually the problem resides in the device manager. KDiskDeviceManager::InitialDeviceScan(). Then the devfs triggers a device scan with "/dev", probe_for_driver_modules() includes the ahci pci device in the scan because its type "/dev/disk" starts with "/dev" (if it was an exact type match, it wouldn't find the disk devfs directory anyway). The ahci driver attachs its device to the ahci pci device. Then the devfs triggers a device scan with "/dev/disk", probe_for_driver_modules() includes the ahci pci device in the scan because its type "/dev/disk" starts with "/dev/disk". The ahci driver attachs again to the same ahci pci device.

A possible fix would be to check whether a pci device has already a child device attached, and avoid a new scan in probe_for_driver_modules() or register_supporting_child_devices() when node->children is not null.

Thoughts ?

comment:5 by korli, 17 years ago

Resolution: → fixed
Status: new → closed

Fixed in hrev22726.

comment:6 by marcusoverhagen, 17 years ago

Resolution: fixed
Status: closed → reopened

Unfortunately hrev22726 didn't really fix it. It still happenes with the revision from last week, same backtrace.

comment:7 by tqh, 17 years ago

Cc: fredrik.holmqvist@… added

Seeing same things as well on hrev23739. I'm using a AMD64 X2 on a SATA-drive in SATA-mode. Panics after 20-30s. Actually this was on a few revisions earlier. This one (where mmlr fixed a bit on sem) I think reported 'Panic: Double Fault' in wm, but I suspect it will do both.

But at least it boots...

comment:8 by PieterPanman, 15 years ago

Is this still relevant? In 2 years no update, and the laptop I had this problem with is broken.

comment:9 by tqh, 15 years ago

I don't see it, so IMO it can be closed.

comment:10 by tqh, 15 years ago

Resolution: → fixed
Status: reopened → closed

Afaict this was fixed a very long time ago.

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