[ros-bugs] [Bug 710] Crash while installing in a low memory condition.

[ReactOS.Bugzilla at reactos.com]

http://reactos.com/bugzilla/show_bug.cgi?id=710


hartmut.birr at gmx.de changed:

           What    |Removed                     |Added
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                 CC|                            |hartmut.birr at gmx.de




------- Additional Comments From hartmut.birr at gmx.de  2005-16-08 17:00 -------
It seems that the bug is related to the tlb flashing. In low memory 
situations, the memory manager removes very often the last page from a page 
table and after this the page table itself. After this action, the tlb for 
this address is cleared explicitly. At the next access to such an address, the 
page table and the page are restored. The memory manager didn't clear the tlb 
entry for this address because it isn't necessary. It seems, that qemu does 
need this clearing of an allredy cleared tlb. If I add a tlb flash after 
setting the page table within the page directory, I do not see the bug and the 
multiple page faults for the same address. I see a message 'MM: Out of swap 
space' after a some more progress of the copy operation.

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