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Date:      Fri, 03 Apr 1998 20:06:44 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        =?koi8-r?B?4c7E0sXKIP7F0s7P1w==?= <ache@nagual.pp.ru>
Cc:        "Alok K. Dhir" <adhir@worldbank.org>, current@FreeBSD.ORG, adkin003@tc.umn.edu
Subject:   Re: More info RE: X slowdown in -current 
Message-ID:  <2814.891626804@critter.freebsd.dk>
In-Reply-To: Your message of "Fri, 03 Apr 1998 21:48:36 %2B0400." <19980403214836.43861@nagual.pp.ru> 

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In message <19980403214836.43861@nagual.pp.ru>, =?koi8-r?B?4c7E0sXKIP7F0s7P1w==

>> If you compare version 1.33 and 1.35 you will see that there is no
>> change in spl() placement and protection.  I simply fail to see 
>> what the heck you think you need to fuck with splhigh for...
>> 
>> Try to diff 1.33 and 1.35 and see what I mean...
>
>With splhigh() any version cause great slowness. The knob is not various
>calculation styles but splhigh() itself. I suppose that splihigh() was
>there for a long time, it means that proposed patch is workaround only and
>real bug is somewhere else. In any case it manifestates itself very
>recently after your general time changes. Why you not simple run
>X11/Netscape to see the bug in action? It is very visible.

The splhigh is needed to prevent a race in the P_SELECT flag handling,
so clearly the bug must be somewhere else.

It will take me some hours before I can reinstall a system with a
-current, all my machines are doing something at the moment.

Does a ktrace reveal anything ?

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
"Drink MONO-tonic, it goes down but it will NEVER come back up!"

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