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Date: Sat, 14 Dec 2013 13:59:04 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Stefan Esser <se@freebsd.org>
Subject: Re: SVN commit 259045 breaks -CURRENT
Message-ID: <20131214215904.GA24545@troutmask.apl.washington.edu>
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On Sat, Dec 14, 2013 at 10:44:10PM +0100, Stefan Esser wrote:
> I noticed a severe slowdown and network problems on my amd64 -CURRENT
> system. By bisecting SVN revisions I identified the following commit
> to be responsible:
> 
> ----------------------------------------------------------------------
> r259045 | kib | 2013-12-06 22:44:13 +0100 (Fri, 06 Dec 2013) | 9 lines
> 
> Disallow optimizations which potentially remove boundary checks
> for signed values due to a compiler authors considering integer
> overflow as impossible.
> 
> The change follows suit of other projects taking the same measure.
> ----------------------------------------------------------------------
> 
> This commit added the following line to /sys/conf/kern.mk:
> 
> CFLAGS+=       -fno-strict-overflow
> 
> 
> The most obvious symptoms of the problem on my system are:
> 
> 1) sa-spamd needs > 140 seconds to start
>    (instead of a few seconds)
> 
> 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. :(

-- 
steve

-- 
Steve