I blindly copied it from include/asm-i386 to include/asm-um, and the following
happened to me:
vmalloc is called when swap is turned on
it allocates some memory, allocates a page for ptes, adds that page to
the kernel page table, and calls set_pgdir to update all of
the process page tables similarly
one of those processes exits
exit_mmap frees the process page table, including the one representing
the kernel vm entry
that page gets reallocated for some other purpose
the kernel page table is now corrupted
So, I have two questions:
What does it mean to have kernel vm entries in process page tables? Are
processes mapping kernel memory?
Why doesn't the above scenario happen on i386?
Jeff
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