| From: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, amul sul <sul_amul(at)yahoo(dot)co(dot)in>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Server crash due to SIGBUS(Bus Error) when trying to access the memory created using dsm_create(). |
| Date: | 2017-09-25 21:07:57 |
| Message-ID: | CAEepm=2Z+UrtAApqOaBbzko8oxcb8NBmx+2JnLnWGRVbzZAsXQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Sep 26, 2017 at 9:57 AM, Thomas Munro
<thomas(dot)munro(at)enterprisedb(dot)com> wrote:
>> On Tue, Sep 26, 2017 at 9:13 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> Pushed with that change; we'll soon see what the buildfarm thinks.
>
> Hmm. One failure in the test modules:
>
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=rhinoceros&dt=2017-09-25%2020%3A45%3A02
>
> 2017-09-25 13:51:00.753 PDT [9107:6] LOG: worker process: test_shm_mq
> (PID 9362) exited with exit code 1
> 2017-09-25 13:51:00.753 PDT [9360:7] ERROR: could not resize shared
> memory segment "/PostgreSQL.1896677221" to 65824 bytes: Success
>
> hostname = centos7x.joeconway.com
> uname -r = 3.10.0-229.11.1.el7.x86_64
I think the problem here is that posix_fallocate() doesn't set errno.
It returns an errno-like value. This is a difference from
fallocate(). Will write a patch.
--
Thomas Munro
http://www.enterprisedb.com
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