[CRIU] [RFC PATCH 00/12] lazy-pages: add non-#PF events handling

[Mike Rapoport]

On Tue, Jan 10, 2017 at 11:53 PM, Andrei Vagin <avagin at virtuozzo.com> wrote:
> On Mon, Jan 09, 2017 at 10:23:14AM +0200, Mike Rapoport wrote:
>> Hi,
>>
>> These patches add handling of userfaultfd events other than page fault. The
>> required kernel patches [1] are merged into the mm tree.
>
> I don't see patches for criu check to detect whether a kernel has these
> patches.

https://github.com/xemul/criu/commit/891fdba1d6ae609e2b4d98bea78d5551b9dafde6

>
>> The lazy-pages daemon will now be able to request fork(), mremap() and
>> madvise(MADV_DONTNEED) events from the kernel and properly respond to those
>> events for the local lazy restore case.
>> The remote lazy restore still requires some more work for correct
>> implementation of the fork() event, and I'm looking at it right now.
>>
>> [1] http://marc.info/?l=linux-mm&m=148189971307409&w=2
>>
>> Mike Rapoport (12):
>>   zdtm.py: postpone waiting for lazy-pages daemon
>>   util: epoll_run: fix event processing loop
>>   util: epoll_run: allow interrupting event polling
>>   lazy-pages: prepare for non-#PF events handling
>>   lazy-pages: track outstanding page faults
>>   lazy-pages: add handling of UFFD_EVENT_MADVDONTNEED
>>   lazy-pages: add handling of UFFD_EVENT_REMAP
>>   page-read: add PID for some debug printouts
>>   page-read: introduce dup_page_read
>>   lazy-pages: add userfault fd to error and debug printouts
>>   lazy-pages: add handling of UFFD_EVENT_FORK
>>   lazy-pages: request userfaultfd events during API handshake
>>
>>  criu/include/pagemap.h |   7 ++
>>  criu/pagemap.c         |  25 ++++-
>>  criu/uffd.c            | 298 ++++++++++++++++++++++++++++++++++++++++++++-----
>>  criu/util.c            |  11 +-
>>  test/zdtm.py           |   8 +-
>>  5 files changed, 308 insertions(+), 41 deletions(-)
>>
>> --
>> 1.9.1
>>
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-- 
Sincerely yours,
Mike.