On 06/05/2016 20:22, Sergey Fedorov wrote: > However, there's no sensible description of what is protected by tb_lock > and mmap_lock. I think we need to have a clear documented description of > the TCG locking scheme in order to be sure we do right things in MTTCG.
I think there was such a patch somewhere, but: tb_lock basically protects tcg_ctx, while mmap_lock protects the user-mode emulation page table (the equivalent for system emulation is the memory map which is protected by the BQL). Furthermore, mmap_lock must be taken outside tb_lock. Paolo
