Re: [Nbd] nbd-server 2.8.6 hangs on nbd-client reconnect

["Mike Snitzer" <snitzer@...17...>]

On 9/1/06, Mike Snitzer <snitzer@...17...> wrote:
> On 8/31/06, Mike Snitzer <snitzer@...17...> wrote:
> > On 8/29/06, Wouter Verhelst <wouter@...3...> wrote:

> > > Did you see this behaviour with previous versions of the server? If not,
> > > I know where to look...
> >
> >
> > SO I'm not sure if your gut on where to look was my select code but...
>
> FYI, I've verified this problem with both 2.8.5 (accept-based) and
> 2.8.6 (select-based).  It is clear that the nbd-server _seems_
> perfectly fine (either blocked in accept or select) waiting for an
> nbd-client connection.  When the nbd-client connection is made without
> gdb or strace attached the nbd-server fails the connection and then
> promptly wedges itself trying to get a mutex.

As you can see I previously established that I also saw the
__lll_mutex_lock_wait() issue with 2.8.5.

I'm glad that you found a bug in my select code but I have my doubts
that it _really_ matters relative to this hang.  It is extremely
strange that the 2.7 select code that you ported actually works given
FD_SET() isn't _ever_ called... doesn't make any sense.

I'll retest with 2.8.8 and/or 2.9.0 to see if this
__lll_mutex_lock_wait() issue is still lurking.

Mike