Re: why change_page_attr on x86 uses __flush_tlb_all

From: Pavel Machek
Date: Thu Apr 22 2004 - 14:52:14 EST


> > I would expect __flush_tlb_one (for each page) as a better choice.
> > It'll be nice if someone can hoghlight on why __flush_tlb_all is used.
> > The kernel version I am referring from is 2.4.18-14
> This works around a bug in some early Athlons with flushing global
> large pages. Also it makes the code slightly simpler and change_page_attr
> is not really performance critical.

Perhaps comment should be added? Otherwise someone is going
to "fix" it sooner or later.
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