linux-kernel - Re: PROBLEM: Postgres fails to start due to kernel issue?

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Message-ID: <CA+5PVA5U-mJKMR63=1Tc6arjhtTkFNOjvSumFiENdJRyVs1Epg@mail.gmail.com>
Date:	Thu, 19 Jan 2012 20:40:27 -0500
From:	Josh Boyer <jwboyer@...il.com>
To:	Dave Haywood <tla@....selfip.net>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: PROBLEM: Postgres fails to start due to kernel issue?

On Thu, Jan 19, 2012 at 7:45 PM, Dave Haywood <tla@....selfip.net> wrote:
> Hi,
>
>  I noticed after upgrading to 3.2.0-08812-gc2bc3a3 that Postgres-9.1 server
> fails to start with error:
>
> FATAL:  could not create shared memory segment: Function not implemented
> DETAIL:  Failed system call was shmget(key=5432001, size=30523392, 03600).
>
>  After some googling, I thought it was a SYSV shared memory sizing issue but
> manually changing kernel.shmmax and kernel.shmall had no effect.
>
>  The problem has been introduced between 3.2.0-08694-g53999bf and
> 3.2.0-08812-gc2bc3a3.
>
>  Let me know if you need any more information.  Bisecting is *very* slow on
> this machine!

If you run strace on it, does it fail with ENOSYS?  This might be
related to an issue Peter just fixed.

josh
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