Parallel bt build crashes when DSM_NONE

From: Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Parallel bt build crashes when DSM_NONE
Date: 2018-02-09 08:06:35
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I happend to find that server crashes during regtest when
DSM_NONE is enforced. The attached patch fixes that.

The cause is the fact that _bt_spools_heapscan runs
_bt_begin_parallel() even if dynamic_shared_memory_type is
DSM_NONE. It is because plan_create_index_workers() is ignoring

We can reproduce this by letting initdb set
dynamic_shared_memory_type=none regardless of actual
availability. (Second attached) and just "make check".


Kyotaro Horiguchi
NTT Open Source Software Center

Attachment Content-Type Size
let-plan_create_index_workers-honor_dsm_none.patch text/x-patch 556 bytes
enfoce-dsm_none_in_regtest.patch text/x-patch 311 bytes


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