[CRIU] [PATCH 0/6] lazy-pages: always use pre-copy for stack

[Andrei Vagin]

Mike, pls take a look at this:

https://travis-ci.org/checkpoint-restore/criu/builds/417048436

On Thu, Aug 16, 2018 at 02:14:39PM -0700, Andrei Vagin wrote:
> Applied, thanks!
> 
> On Mon, Aug 13, 2018 at 04:29:07PM +0300, Mike Rapoport wrote:
> > Hi,
> > 
> > Using lazy restore for the current stack causes interesting effects in the
> > behaviour of the restored process. For instance, return from a system call
> > or signal handling take completely different paths when the page containing
> > the current stack frame is not present.
> > 
> > We can force pre-copy of the stack pages with almost no cost.
> > 
> > I'd appreciate if ppc64 and s390 people will confirm that my definitions of
> > REG_SP() for these architecture are correct :)
> > 
> > Mike Rapoport (6):
> >   compel: add APIs to get stack pointers
> >   criu: cleanup stale declarations of parasite_{init,fini}_threads_seized
> >   criu: dump: prepare parasite control for threads at infect time
> >   criu: dump: get stack pointers of all threads early
> >   criu: mem: introduce generate_vma_iovs helper function
> >   lazy-pages: don't mark current stack page as lazy
> > 
> >  .../src/lib/include/uapi/asm/infect-types.h        |   1 +
> >  .../arm/src/lib/include/uapi/asm/infect-types.h    |   1 +
> >  .../ppc64/src/lib/include/uapi/asm/infect-types.h  |   1 +
> >  .../s390/src/lib/include/uapi/asm/infect-types.h   |   1 +
> >  .../x86/src/lib/include/uapi/asm/infect-types.h    |   1 +
> >  compel/include/uapi/infect.h                       |   3 +
> >  compel/src/lib/infect.c                            |  10 +++
> >  criu/cr-dump.c                                     |   3 +-
> >  criu/include/parasite-syscall.h                    |   9 +-
> >  criu/include/pstree.h                              |   2 +
> >  criu/mem.c                                         | 100 +++++++++++++--------
> >  criu/parasite-syscall.c                            |  50 +++++++++--
> >  12 files changed, 133 insertions(+), 49 deletions(-)
> > 
> > -- 
> > 2.7.4
> > 
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