Re: [PATCH] anobjrmap 9 priority mjb tree

[Rajesh Venkatasubramanian]

> > I don't know why bit_spin_lock with vma->vm_flags should be a problem
> > if it is used without mmap_sem. Can you explain ?
>
> you seem not to know all rules about the atomic operations in smp, you
> cannot just set_bit on one side and use non-atomic operations on the
> other side, and expect the set_bit not to invalidate the non-atomic
> operations.
>
> The effect of the mprotect may be deleted by your new concurrent
> set_bit and stuff like that.

Thank you very much for that. Stupid me. I didn't read the code in
page->flags properly. Thanks again.

Rajesh


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