[haiku-bugs] Re: [Haiku] #8345: PANIC: ASSERT FAILED ... x86/paging/pae/x86VMTranslationMapPAE.cpp:231
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Wed, 17 Apr 2013 13:38:30 -0000
#8345: PANIC: ASSERT FAILED ... x86/paging/pae/x86VMTranslationMapPAE.cpp:231
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Reporter: kallisti5 | Owner: bonefish
Type: bug | Status: assigned
Priority: critical | Milestone: R1/beta1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords: vm pae
Blocked By: | Blocking: 9435, 9520, 9677
Has a Patch: 1 | Platform: x86
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Comment (by bonefish):
Replying to [comment:42 phoudoin]:
> Now that it seems more reproducible, may be interesting to trace
pageTable value and pageTableEntry index in that table: is there a pattern
regarding pageTable or PTE position or not.
The page table is simply some physical page allocated for that purpose.
There aren't any address restrictions, so it can be any page. The PTE's
address depends on page table address and mapped virtual address. If you
mean, whether there's a patter wrt. where the errors occur, I haven't seen
any.
> AFAIK, only kernel land stuffs or DMA access could change these PAE
tables content over VM shoulder, right?
I think the most likely case is that somehow a physical page is doubly-
used -- e.g. handed out twice by the page allocation code or not correctly
unmapped by someone -- for a page table and at the same time by someone
else.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8345#comment:43>
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