From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <9ab217670703210853g2b268bc6w1bfde7b6538af507@mail.gmail.com>
Date: Wed, 21 Mar 2007 11:53:52 -0400
From: "Devon H. O'Dell" <devon.odell@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] Fossil errors
In-Reply-To: <5004b4c047c1935649ded179c20abc09@coraid.com>
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2007/3/21, erik quanstrom <quanstro@coraid.com>:
> it means that lock() (/sys/src/9/port/taslock.c:/^lock) is looping way too much
> in rendezvous.  0x37a34 is in rendezvous.s.
>
> i don't know fossil or venti very well.  it would be hard to say what is wrong with
> the threading here without some serious groveling.  my wild guess would be that
> there are three processes (21 26 23) at the same rendezvous point at the same time.
> rendezvous works for two processes.
>
> i wonder why libventi doesn't use the thread library?

In either case, it doesn't seem to happen very often. I got it by @{
cd ; tar -c . } | tar -xv ing my MP3s. So far, using cpdir, I haven't
seen any of this yet.

--dho

> - erik
> On Wed Mar 21 09:29:52 EDT 2007, devon.odell@gmail.com wrote:
> > I installed Inferno on my FreeBSD machine so that I could copy my MP3s
> > over to the Plan 9 fileserver. I left last night around midnight, and
> > when coming in again this morning, I notice a few kernel messages:
> >
> > lock 0xf0a685c8 loop key 0xdeaddead pc 0xf01c9af2 held by pc 0xf01c9af2 proc 21
> >  26: fossil pc f01ca23d dbgpc 37a34 Rendez (Running) ut 959 st 4926
> > bss 703000 qpc 0 nl 0 nd 0 lpc f01c1f5d pri 4
> >  21: fossil pc f01bda3e dbgpc 37a34 Rendez (Ready) ut 89555 st 244 bss
> > 703000 qpc 0 nl 1 nd 0 lpc f01bd877 pri 3
> > lock 0xf0a685c8 loop key 0xdeaddead pc 0xf01c9af2 held by pc 0xf01c9af2 proc 21
> >  23: fossil pc f01ca20f dbgpc 37a34 Rendez (Running) ut 352 676 bss
> > 703000 qpc 0 nl 0 nd 0 lpc f01c1f5d pri 4
> >  21: fossil pc f01xdxxx (unreadable due to terminals) qpc 0 nl 1 nd 0
> > lpc f01bd877 pri 3
> >
> > Not sure what this means. I guess typically 0xdeaddead-like stuff is
> > used to signify use of memory after a free, but I'm kind of unsure.
> >
> > Also, it looks like it decided to randomly stop copying somewhere in
> > the middle of my MP3 stream.
> >
> > *shrugs*
> >
> > --dho
>