Re: [PATCH 02/14] rseq: Introduce restartable sequences system call (v13)

[Mathieu Desnoyers]

----- On May 16, 2018, at 12:24 PM, Peter Zijlstra peterz@xxxxxxxxxxxxx wrote:

> On Mon, Apr 30, 2018 at 06:44:21PM -0400, Mathieu Desnoyers wrote:
>> Expose a new system call allowing each thread to register one userspace
>> memory area to be used as an ABI between kernel and user-space for two
>> purposes: user-space restartable sequences and quick access to read the
>> current CPU number value from user-space.
> 
>> ---
>>  MAINTAINERS                 |  11 ++
>>  arch/Kconfig                |   7 +
>>  fs/exec.c                   |   1 +
>>  include/linux/sched.h       | 134 +++++++++++++++++
>>  include/linux/syscalls.h    |   4 +-
>>  include/trace/events/rseq.h |  57 +++++++
>>  include/uapi/linux/rseq.h   | 133 +++++++++++++++++
>>  init/Kconfig                |  23 +++
>>  kernel/Makefile             |   1 +
>>  kernel/fork.c               |   2 +
>>  kernel/rseq.c               | 357 ++++++++++++++++++++++++++++++++++++++++++++
>>  kernel/sched/core.c         |   2 +
>>  kernel/sys_ni.c             |   3 +
>>  13 files changed, 734 insertions(+), 1 deletion(-)
>>  create mode 100644 include/trace/events/rseq.h
>>  create mode 100644 include/uapi/linux/rseq.h
>>  create mode 100644 kernel/rseq.c
>> 
> 
> Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>

Thanks Peter !

Mathieu


-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com