From: Vladimir Davydov <vdavydov.dev@gmail.com> To: Konstantin Osipov <kostja@tarantool.org> Cc: tarantool-patches@freelists.org Subject: Re: [PATCH 3/8] memtx: pass engine to memory allocation functions Date: Tue, 22 May 2018 17:39:29 +0300 [thread overview] Message-ID: <20180522143929.jhu77fa6n57gltoo@esperanza> (raw) In-Reply-To: <20180522134728.GC11201@atlas> On Tue, May 22, 2018 at 04:47:28PM +0300, Konstantin Osipov wrote: > * Vladimir Davydov <vdavydov.dev@gmail.com> [18/05/22 15:10]: > > We need this so that we can force garbage collection when we are short > > on memory. There are two such functions: one is used for allocating > > index extents, another for allocating tuples. Index allocating function > > has an opaque context so we simply reuse it for passing memtx engine to > > it. To pass memtx engine to tuple allocating function, we add an opaque > > engine specific pointer to tuple_format (engine_data) and set it to > > memtx_engine for memtx spaces. > > Please rename engine_data to engine. OK. > I would not use an opaque pointer either, reference the engine > explicitly. The reason I decided to make it an opaque pointer is that we might want to reuse it in vinyl to make vy_max_tuple_size, which is currently a global variable, a part of vy_env. The problem is vy_max_tuple_size is used in vy_stmt.c, which knows nothing about vy_env, so to avoid cross dependencies we will probably have to introduce vy_stmt_env to store this variable and make tuple_format reference not the whole vy_env, but only vy_stmt_env hence the opaque pointer.
next prev parent reply other threads:[~2018-05-22 14:39 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-22 11:46 [PATCH 0/8] Follow-up on async memtx index cleanup Vladimir Davydov 2018-05-22 11:46 ` [PATCH 1/8] memtx: init index extent allocator in engine constructor Vladimir Davydov 2018-05-22 13:43 ` Konstantin Osipov 2018-05-22 11:46 ` [PATCH 2/8] memtx: fold memtx_tuple.cc into memtx_engine.c Vladimir Davydov 2018-05-22 13:45 ` Konstantin Osipov 2018-05-22 11:46 ` [PATCH 3/8] memtx: pass engine to memory allocation functions Vladimir Davydov 2018-05-22 13:47 ` Konstantin Osipov 2018-05-22 14:39 ` Vladimir Davydov [this message] 2018-05-22 11:46 ` [PATCH 4/8] memtx: move all global variables to engine Vladimir Davydov 2018-05-22 13:48 ` Konstantin Osipov 2018-05-22 11:46 ` [PATCH 5/8] memtx: destroy slab arena on engine shutdown Vladimir Davydov 2018-05-22 13:50 ` Konstantin Osipov 2018-05-22 16:26 ` Vladimir Davydov 2018-05-22 11:46 ` [PATCH 6/8] memtx: embed light hash into memtx_hash_index Vladimir Davydov 2018-05-22 13:51 ` Konstantin Osipov 2018-05-22 11:46 ` [PATCH 7/8] memtx: rework background garbage collection procedure Vladimir Davydov 2018-05-22 13:56 ` Konstantin Osipov 2018-05-22 14:49 ` Vladimir Davydov 2018-05-22 16:42 ` Konstantin Osipov 2018-05-22 11:46 ` [PATCH 8/8] memtx: run garbage collection on demand Vladimir Davydov 2018-05-22 14:00 ` Konstantin Osipov
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