| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Cc: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Subject: | Re: Atomics for heap_parallelscan_nextpage() |
| Date: | 2017-08-16 15:16:58 |
| Message-ID: | 24382.1502896618@sss.pgh.pa.us |
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Heikki Linnakangas <hlinnaka(at)iki(dot)fi> writes:
> A couple of 32-bit x86 buildfarm members don't seem to be happy with
> this. I'll investigate, but if anyone has a clue, I'm all ears...
dromedary's issue seems to be alignment:
TRAP: UnalignedPointer("(((uintptr_t) ((uintptr_t)(ptr)) + ((8) - 1)) & ~((uintptr_t) ((8) - 1))) != (uintptr_t)(ptr)", File: "../../../../src/include/port/atomics.h", Line: 452)
2017-08-16 11:11:38.558 EDT [75693:3] LOG: server process (PID 76277) was terminated by signal 6: Abort trap
2017-08-16 11:11:38.558 EDT [75693:4] DETAIL: Failed process was running: select count(*) from a_star;
Not sure if this is your bug or if it's exposing a pre-existing
deficiency in the atomics code, viz, failure to ensure that
pg_atomic_uint64 is actually a 64-bit-aligned type. Andres?
regards, tom lane
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