Re: [RFC][PATCH] new timeofday core subsystem (v. A3)

From: Albert Cahalan
Date: Tue Mar 15 2005 - 10:45:06 EST

On Mon, 2005-03-14 at 19:22 -0800, Christoph Lameter wrote:
> On Mon, 14 Mar 2005, Albert Cahalan wrote:
> > When the vsyscall page is created, copy the one needed function
> > into it. The kernel is already self-modifying in many places; this
> > is nothing new.
> AFAIK this will only works on ia32 and x86_64 and not definitely not
> on ia64. Who knows about the other platforms ....

I'll bet it does work fine on IA-64. If it didn't, you would
be unable to load the kernel or load an executable.

I know it works for PowerPC. You'll need an isync instruction
of course. You may also want a sync instruction and some code
to invalidate the cache.

Setting up the page content should be a 1-time operation done
at boot. Check your processor manuals as needed.

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