On 05/16/2017 09:19 AM, Balbir Singh wrote: > patch_instruction is enhanced in this RFC to support > patching via a different virtual address (text_poke_area).
Why writing instruction directly into the address is not sufficient and need to go through this virtual address ? > The mapping of text_poke_area->addr is RW and not RWX. > This way the mapping allows write for patching and then we tear > down the mapping. The downside is that we introduce a spinlock > which serializes our patching to one patch at a time. So whats the benifits we get otherwise in this approach when we are adding a new lock into the equation.
