Date: Wed, 29 Feb 2012 12:59:54 -0500 From: Arnaud Lacombe <lacombar@gmail.com> To: Attilio Rao <attilio@freebsd.org> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Complete hang on 9.0-RELEASE Message-ID: <CACqU3MVL14TxJ81rbM-Oq2P8GZCE0hPKzQpb5eJqZ32YdowSjQ@mail.gmail.com> In-Reply-To: <CACqU3MV-mDHzmnXY3Mzc%2BBnimJSnUTAPk66fh%2Bzzdfgz4OyPFg@mail.gmail.com> References: <CACqU3MUefo4mG3GdZnj6kxxFx4H_M3-NLys8pCKptqNU4r_ywA@mail.gmail.com> <CACqU3MVs1mpiQpjE9xC8aFAKxhzbjUgC_6GKWdAkyr8OGJhycw@mail.gmail.com> <CAJ-FndDz6eRamnf7v6kZwwZQp-JaLYUKX6Gx7MYuZGEFNagmfQ@mail.gmail.com> <CACqU3MV-mDHzmnXY3Mzc%2BBnimJSnUTAPk66fh%2Bzzdfgz4OyPFg@mail.gmail.com>
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Hi, On Mon, Feb 27, 2012 at 12:48 PM, Arnaud Lacombe <lacombar@gmail.com> wrote= : > Hi, > > On Mon, Feb 27, 2012 at 10:36 AM, Attilio Rao <attilio@freebsd.org> wrote= : >> 2012/2/27, Arnaud Lacombe <lacombar@gmail.com>: >>> Hi, >>> >>> On Tue, Feb 14, 2012 at 11:41 AM, Arnaud Lacombe <lacombar@gmail.com> w= rote: >>>> Hi folks, >>>> >>>> For the records, I was running some tests yesterday on top of a >>>> 9.0-RELEASE, amd64, kernel when the box hanged. At the time of the >>>> hang, the box was running a process with about 2800 threads with heavy >>>> IPC between 1400 writers and 1400 readers. The box was in single user >>>> mode (/bin/sh coming from FreeBSD 7.4-STABLE). Here is the beginning >>>> of the dmesg: >>>> >>> This happened a second time, now with FreeBSD 8.2-RELEASE. Complete >>> machine hang. The machine was running about 4000 threads in a single >>> process, all the other condition are the same. >> >> Arnaud, >> can you please break in your kernel via KDB, collect the following >> informations from the DDB prompt: >> - ps >> - alltrace >> - show allpcpu >> - possibly get a coredump with 'call doadump' >> > Will do, but I'll need to rebuild a kernel to include DDB. > >> and in the end provide all those along with kernel binary and possibly >> sources somewhere? >> > I'll be testing a bare `release/8.2.0' with the following patch: > > diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC > index c3e0095..7bd997f 100644 > --- a/sys/amd64/conf/GENERIC > +++ b/sys/amd64/conf/GENERIC > @@ -79,6 +79,10 @@ options =A0 =A0 =A0INCLUDE_CONFIG_FILE =A0 =A0 # Inclu= de this > file in kernel > > =A0options =A0 =A0 =A0 =A0KDB =A0 =A0 =A0 =A0 =A0 # Kernel debugger relat= ed code > =A0options =A0 =A0 =A0 =A0KDB_TRACE =A0 =A0 # Print a stack trace for a p= anic > +options =A0 =A0 =A0 =A0DDB > +options =A0 =A0 =A0 =A0BREAK_TO_DEBUGGER > +options =A0 =A0 =A0 =A0ALT_BREAK_TO_DEBUGGER > > =A0# Make an SMP-capable kernel by default > =A0options =A0 =A0 =A0 =A0SMP =A0 =A0 =A0 =A0 =A0 # Symmetric MultiProces= sor Kernel > ok, it happened again after 2 days, the process was running about 3200 threads. I'm trying to break into DDB and let you know, I'm not that successful for now... - Arnaud > =A0- Arnaud > >> Thanks, >> Attilio >> >> >> -- >> Peace can only be achieved by understanding - A. Einstein
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