http://bugzilla.kernel.org/show_bug.cgi?id=11426
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|[EMAIL PROTECTED]|[EMAIL PROTECTED]
|bugs.osdl.org |
Component|Power-Processor |Serial ATA
Product|ACPI |IO/Storage
------- Comment #4 from [EMAIL PROTECTED] 2008-08-25 14:13 -------
This does not seem to be ACPI problem. Looks like there is some memory
corruption happening when dma is used to access CD ROM.
The divide error in acpi_idle_enter_simple(), the trace shows that the
instruction causing the error is nop, nop, followed by mov, which should never
happen. acpi_idle_enter_simple has one divide in the code, but it is a divide
by a constant value. So that should never cause divide error as well.
Also, acpi_idle_enter_simple error is the #2 error. The #1 div error seems to
be at sysenter_past_esp(), which again according to trace, is nop followed by
lea instruction. Those instructions should not cause div error as well.
Most likely, the actual code fetched from I-cache was different and was
corrupted, and code sequence we print in the above trace is coming from
L2/D-cache and probably different from what was tried to be executed.
I think this should get attention of some SATA/ATAPI folks.
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