From: Andi Kleen <ak@suse.de>
To: Ulrich Drepper <drepper@redhat.com>
Cc: Andi Kleen <ak@suse.de>, Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Better CLONE_SETTLS support for Hammer
Date: Wed, 5 Mar 2003 22:21:07 +0100 [thread overview]
Message-ID: <20030305212107.GB7961@wotan.suse.de> (raw)
In-Reply-To: <3E6650D4.8060809@redhat.com>
On Wed, Mar 05, 2003 at 11:32:36AM -0800, Ulrich Drepper wrote:
> > If you just want to save one mmap/allocation: I think the context switch
> > overhead will be more expensive than the allocation.
>
> And two more things:
>
> 1. every process will already use the prctl(ARCH_SET_FS). We are
> talking here only about the 2nd thread and later. We need to use
> prctl(ARCH_SET_FS) for TLS support.
Not when you put it into the first four GB. Then you can use the same
calls as 32bit.
> 2. May I remind you that you were in the crowd who complained when we
> requested a dedicated thread register? Yes, I still would prefer that
> but I have no energy to battle for that.
I don't see the connection.
-Andi
next prev parent reply other threads:[~2003-03-05 21:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-05 18:55 Better CLONE_SETTLS support for Hammer Ulrich Drepper
2003-03-05 19:06 ` Andi Kleen
2003-03-05 19:25 ` Ulrich Drepper
2003-03-05 21:19 ` Andi Kleen
2003-03-05 19:32 ` Ulrich Drepper
2003-03-05 21:21 ` Andi Kleen [this message]
2003-03-05 23:04 ` Ulrich Drepper
2003-03-06 1:05 ` Andi Kleen
2003-03-06 3:53 ` Ulrich Drepper
2003-03-06 4:14 ` Ulrich Drepper
2003-03-06 10:27 ` Andi Kleen
2003-03-06 18:58 ` Ulrich Drepper
2003-03-06 19:09 ` Andi Kleen
2003-03-06 2:08 ` Benjamin LaHaise
2003-03-06 3:52 ` Ulrich Drepper
2003-03-06 5:29 ` Benjamin LaHaise
2003-03-06 5:47 ` Ulrich Drepper
2003-03-06 5:33 ` H. Peter Anvin
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