| 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 |
| Message-ID: | 20180209.170635.256350357.horiguchi.kyotaro@lab.ntt.co.jp |
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| Lists: | pgsql-hackers |
Hello.
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
dynamic_shared_memory_type.
We can reproduce this by letting initdb set
dynamic_shared_memory_type=none regardless of actual
availability. (Second attached) and just "make check".
regards,
--
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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