Subject: Re: RE : Re: SS20 random hanging.
To: None <port-sparc@netbsd.org>
From: Christos Zoulas <christos@astron.com>
List: port-sparc
Date: 03/16/2007 23:16:33
In article <589518.24374.qm@web31111.mail.mud.yahoo.com>,
Laurent FAILLIE  <l_faillie@yahoo.com> wrote:
>Hello,
>
>Thanks all for your help.
>
>> >3/ Is someone working on this nasty threading
>> problem
>> >on Sparc architecture ?
>> 
>> Yes, it has been fixed now that SA threads have been
>> disabled on head.
>
>For my own information : what means 'SA' and why it
>will not work on Sparc ?

SA refers to the Scheduler Activation based pthreads which were difficult
to make work on the sparc because of register window flushing. In a context
switch the sparc might need to sleep (fault in pages) which is not allowed.

christos