linux-kernel - Re: Any lightweight way for one thread to force another thread to suspend execution?

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Message-ID: <877iciyjcs.fsf@basil.nowhere.org>
Date:	Sat, 21 Jun 2008 16:04:51 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"Eric Smith" <eric@...uhaha.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Any lightweight way for one thread to force another thread to  suspend execution?

"Eric Smith" <eric@...uhaha.com> writes:
>
> What I've thought about so far (but haven't tested) for thread A
> to suspend thread B is to use a signal and two pthread conditions:

Any such mechanism will need a syscall, and it's unlikely that
any syscall will get much cheaper than a kill(SIGSTOP) 

-Andi
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