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Date:      Mon, 6 Sep 1999 14:33:16 -0400 (EDT)
From:      Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To:        Jason Nordwick <nordwick@erdos.askjeeves.com>
Cc:        current@FreeBSD.ORG
Subject:   Re: (P)review: sigset_t for more than 32 signals 
Message-ID:  <199909061833.OAA03865@khavrinen.lcs.mit.edu>
In-Reply-To: <199909061806.LAA21448@erdos.askjeeves.com>
References:  <199909061607.MAA03384@khavrinen.lcs.mit.edu> <199909061806.LAA21448@erdos.askjeeves.com>

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<<On Mon, 06 Sep 1999 11:06:51 -0700, Jason Nordwick <nordwick@erdos.askjeeves.com> said:

> Wouldn't you hose uthread performance?  I thought that one of the major
> benefits it that a context switch in uthreads did not require kernel
> intervention and a syscall.

It's true that this would (currently) slow down uthreads.  However, I
suspect that uthreads may want to do its own signal-mask handling
anyway (even though it currently doesn't).  On the other hand, if we
made jmp_buf and struct sigcontext compatible, it could clean up the
thread scheduler's inner workings.

-GAWollman

--
Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
wollman@lcs.mit.edu  | O Siem / The fires of freedom 
Opinions not those of| Dance in the burning flame
MIT, LCS, CRS, or NSA|                     - Susan Aglukark and Chad Irschick


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