cvs commit: src/sys/i386/acpica acpi_wakeup.c
nate at root.org
Mon Jul 21 14:51:55 PDT 2003
On Mon, 21 Jul 2003, Peter Wemm wrote:
> Modified files:
> sys/i386/acpica acpi_wakeup.c
> Commit Ian Dowse's workaround for acpi resume resetting after the
> LAZY_SWITCH changes. He pointed out the acpi code sets up an identity
> mapping in the current vmspace and that got messed up by the %cr3 being
> out of sync with the current page directory. As a workaround, restore
> %cr3 across the sleep/resume. A more complete fix would be to undo the
> lazy state and clear the pm_active bit from the borrowed pmap, but this
> works and people are currently hurting. I'll clean this up.
> This is mostly Ian's patch, plus a PAE tweak from me.
Thank you for following up on this. As I asked on the Usenix conf. call,
are there any other registers that are being missed in the save/restore?
There are some other aging code in this wakeup code that may not fit with
our changing register models.
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