Date: Mon, 27 Feb 2012 12:48:35 -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: <CACqU3MV-mDHzmnXY3Mzc%2BBnimJSnUTAPk66fh%2Bzzdfgz4OyPFg@mail.gmail.com> In-Reply-To: <CAJ-FndDz6eRamnf7v6kZwwZQp-JaLYUKX6Gx7MYuZGEFNagmfQ@mail.gmail.com> References: <CACqU3MUefo4mG3GdZnj6kxxFx4H_M3-NLys8pCKptqNU4r_ywA@mail.gmail.com> <CACqU3MVs1mpiQpjE9xC8aFAKxhzbjUgC_6GKWdAkyr8OGJhycw@mail.gmail.com> <CAJ-FndDz6eRamnf7v6kZwwZQp-JaLYUKX6Gx7MYuZGEFNagmfQ@mail.gmail.com>
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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> wrote: >>> 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 INCLUDE_CONFIG_FILE # Include this file in kernel options KDB # Kernel debugger related code options KDB_TRACE # Print a stack trace for a panic +options DDB +options BREAK_TO_DEBUGGER +options ALT_BREAK_TO_DEBUGGER # Make an SMP-capable kernel by default options SMP # Symmetric MultiProcessor Kernel - Arnaud > Thanks, > Attilio > > > -- > Peace can only be achieved by understanding - A. Einstein
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