Date: Fri, 28 Sep 2012 22:12:36 -0400 From: Boris Kochergin <spawk@acm.poly.edu> To: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: qmail-remote uses 100% CPU when delivering to certain hosts Message-ID: <50665914.8080301@acm.poly.edu>
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[-- Attachment #1 --]
Hi.
Firstly, my environment:
FreeBSD isis.poly.edu 9.1-RC1 FreeBSD 9.1-RC1 #0: Thu Sep 20 23:42:23
EDT 2012 boris@jails.isis.poly.edu:/usr/obj/usr/src/sys/GENERIC amd64
qmail-tls-1.03.20021228_4
I have noticed that qmail-remote spins around using 100% CPU forever
when delivering mail to a select few hosts. I believe this all to be in
userspace as top reports that the CPU is busy with only userspace code.
This has never happened when the machine was running 8.0-RELEASE, but
happens with 8.2-RELEASE and 9.1-RC1.
The environment this happens in is a jail.
Calling truss on the offending processes produces no output, with truss
in the "wait" state forever. I've tcpdumped the conversation between the
qmail-remote process and the remote host. It is attached with this e-mail.
Thoughts?
-Boris
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