Re: 4k stacks in 2.6

From: Linus Torvalds (torvalds_at_osdl.org)
Date: 05/27/04

  • Next message: Jörn Engel: "Re: 4k stacks in 2.6" 
    Date:	Thu, 27 May 2004 07:55:36 -0700 (PDT)
To: Andrea Arcangeli <andrea@suse.de>

    On Thu, 27 May 2004, Andrea Arcangeli wrote:
    >
    > On Thu, May 27, 2004 at 10:18:40AM -0400, Brian Gerst wrote:
    > > The problem on i386 (unlike x86-64) is that the thread_info struct sits
    > > at the bottom of the stack and is referenced by masking bits off %esp.
    > > So the stack size must be constant whether in process context or IRQ
    > > context.
    >
    > so what, that's a minor implementation detail, pda is a software thing.

    "minor implementation detail"?

    You need to get to the thread info _some_ way, and you need to get to it
    _fast_. There are really no sane alternatives. I certainly do not want to
    play games with segments.

                    Linus
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  • Next message: Jörn Engel: "Re: 4k stacks in 2.6"

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