PPro: Global flag in page table

Nat Friedman (ndf@ALEPH1.MIT.EDU)
Wed, 11 Feb 1998 15:27:50 -0500

Messages sorted by: [ date ][ thread ][ subject ][ author ]
Next message: Trevor Johnson: "soundconfig patch to 2.1.86"
Previous message: Aron Griffis: "[OFFTOPIC] GTK and alternative GUIs and windowing systems in Linux"

I was just reading through some Intel docs and noticed that the Pentium Pro
introduced a Global flag for for page table and page directory entries. When
this flag is set on an entry, and the PGE (Page Global Enable) flag is set
in register CR4, the entry is not invalidated in the TLB on a task switch.
My understanding of this is crude, so be gentle if I've misunderstood, but
I don't think that this is implemented for Linux and was wondering if the
benefits warranted implementing it.

Miguel tells me that a similar tactic is implemented in the MIPS port - it
might be nice for PPro to have it too.

-Nat

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu

Next message: Trevor Johnson: "soundconfig patch to 2.1.86"
Previous message: Aron Griffis: "[OFFTOPIC] GTK and alternative GUIs and windowing systems in Linux"