SVN commit 259045 breaks -CURRENT

[Konstantin Belousov]

On Sun, Dec 15, 2013 at 05:28:14PM +0100, Marc UBM wrote:
> On Sun, 15 Dec 2013 08:43:22 +0200
> Konstantin Belousov <kostikbel at gmail.com> wrote:
> 
> > On Sat, Dec 14, 2013 at 09:56:04PM -0800, Steve Kargl wrote:
> > > On Sun, Dec 15, 2013 at 07:47:22AM +0200, Konstantin Belousov wrote:
> > > > On Sat, Dec 14, 2013 at 02:16:27PM -0800, Steve Kargl wrote:
> > > > > On Sat, Dec 14, 2013 at 11:11:15PM +0100, Stefan Esser wrote:
> > > > > > Am 14.12.2013 22:59, schrieb Steve Kargl:
> > > > > > > On Sat, Dec 14, 2013 at 10:44:10PM +0100, Stefan Esser wrote:
> > > > > > >>
> > > > > > >> 2) SSH logins are very slow, many seconds of delay between connect
> > > > > > >>    and password prompt, several seconds after password entry until
> > > > > > >>    a command prompt appears (normally instantaneous)
> > > > > > >>
> > > > > > > 
> > > > > > > Ah, so that explains the behavior I'm see.  Just updated a circa Aug 3rd
> > > > > > > i386 FreeBSD to top-of-tree.  My ssh logins to my work system take 30+
> > > > > > > seconds now. :(
> > > > > > 
> > > > > > You may want to test the attached patch, which reverts the above
> > > > > > mentioned commit.
> > > > > > 
> > > > > 
> > > > > I probably won't get to it until tomorrow, because I had started
> > > > > a dog-food system purge including re-installing all ports.  The
> > > > > laptop takes a bit a time to recompile everything.
> > > > > 
> > > > 
> > > > Are you all running i386, compiled with gcc ?
> > > 
> > > The Aug 3rd system was built with gcc.  The system upgrade I
> > > did this morning is using clang.  I rebuilt everything and
> > > delete old things with delete-old and delete-old-libs.
> 
> A kernel built with the commit reverted has not exhibited any similar
> behavior during the whole day. I'll recompile again with the overflow
> option enabled to see if the issue returns.

I am interested in a different experiment.  Compile the same version
of the kernel with gcc with -fno-strict-overflow enabled.  Report if
the same problem persist.

I am going to revert the option in several minutes, but do want see
the result of the above test.
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