Re: sblock state on FreeBSD 6.1

On Wed, May 10, 2006 at 04:24:45PM -0400, Alvaro Herrera wrote:
> Jim C. Nasby wrote:
> > We tried reproducing this on a backup server. We haven't been able to
> > wedge the system into a state where there's tons of sblock processes
> > and nothing's getting done, but we were able to get some processes into
> > sblock and get stack traces:
> >
> > #0 0x000000080135bd2c in recvfrom () from /lib/libc.so.6
> > #1 0x00000000004f9898 in secure_read ()
> > #2 0x00000000004fed7b in TouchSocketFile ()
> > #3 0x00000000004fee27 in pq_getbyte ()
> > #4 0x000000000055febf in PostgresMain ()
> > #5 0x000000000053a487 in ClosePostmasterPorts ()
> > #6 0x000000000053bab7 in PostmasterMain ()
> > #7 0x0000000000500436 in main ()
>
> This stack trace doesn't make any sense. ClosePostmasterPorts is not
> calling PostgresMain. And pq_getbyte is not calling TouchSocketFile,
> which in turn isn't calling secure_read.

So I see... that's rather disturbing... any idea why gdb would end up
that confused?
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461