[PATCH v2 0/2] vinyl: in a task use copy of index key defs to protect from alter

[Vladimir Davydov]

Looks good to me.

On Thu, Mar 15, 2018 at 03:19:14PM +0300, Vladislav Shpilevoy wrote:
> Branch: http://github.com/tarantool/tarantool/tree/gh-3229-space-format-enables-optional-v2
> Issue: https://github.com/tarantool/tarantool/issues/3229
> 
> A vinyl space can be altered in such a way, that key definitions
> of indexes are not changed, but comparators do. It is because
> space format reset can make some indexed fields optional.
> 
> To be able update key definitions in place, they must not be used
> in a worker thread. So lets copy key_defs for a worker, and
> update index key definitions in place.
> 
> An alternative is key_defs reference counting, but there is open
> questions what to do in key_defs in mems, ranges, iterators,
> runs, slices. Now lets do a hotfix of a crash, and then
> refactoring.
> 
> Vladislav Shpilevoy (2):
>   Do not mix box_key_def_delete and free to delete key_def
>   vinyl: in a task use copy of index key defs to protect from alter
> 
>  src/box/alter.cc                |  3 ++-
>  src/box/key_def.cc              | 10 ++++++++--
>  src/box/key_def.h               |  7 +++++++
>  src/box/schema.cc               |  4 ++--
>  src/box/vinyl.c                 | 10 ++++++++--
>  src/box/vy_index.c              |  8 ++++----
>  src/box/vy_scheduler.c          | 25 ++++++++++++++++++++++---
>  test/engine/ddl.result          |  2 +-
>  test/engine/ddl.test.lua        |  2 +-
>  test/unit/vy_iterators_helper.c |  2 +-
>  test/unit/vy_mem.c              |  4 ++--
>  test/unit/vy_point_lookup.c     |  2 +-
>  test/unit/vy_write_iterator.c   |  2 +-
>  13 files changed, 60 insertions(+), 21 deletions(-)