Messages in this thread | | | Date | Mon, 7 Oct 2013 20:10:18 +0200 | From | Andi Kleen <> | Subject | Re: [RFC] [PATCH 00/19] Non disruptive application core dump infrastructure using task_work_add() |
| |
> > Couldn't they just use the new process_vm_readv() syscalls instead? > > AFAIK those do not require ptrace. > > > We need the register set and hence would need a ptrace.
But the kernel needs to stop to to read the registers.
Do you have data how much the latency difference is between an optimized ptrace reader (using PTRACE_GETREGSET) vs the kernel ?
-Andi
| |