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    SubjectRe: Handle kernel page faults using task gate

    * Ingo Molnar <> wrote:

    > * eliad lubovsky <> wrote:
    > > I am trying to handle page faults exceptions in the kernel using the
    > > task gate mechanism. I succeeded to transfer the execution to my page
    > > fault handler using a new TSS and updates to the GDT and IDT tables
    > > (similar to the double fault mechanism in 2.6). After handling the
    > > fault and allocating the physical page I use the iret instruction to
    > > switch back to the previous task. The problem is that I got a double
    > > fault with the same address that cause the fault (although the
    > > physical page is allocated and mapped). Any clues?
    > are you clearing the 'nested task' (NT) flag of the new TSS once you
    > have switched to it?

    correction - i meant the 'busy' bit in the TSS descriptor. It's being
    set by TSS-switch operations, and needs to be cleared.

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