Re: 2.4.10pre13aa1

[Benjamin LaHaise <bcrl@redhat.com>]

On Sun, Sep 23, 2001 at 11:46:18AM +0200, Manfred Spraul wrote:
> I don't think that this is a valid argument:
> you are testing on i386 and make design decisions for the architecture
> independant part.

The hook is only needed for x86-like architectures, as all of the risc like 
cpus perform the dirty state modification in the page fault handler while 
holding the page_table_lock.

> I'd prefer ptep_get_and_clear_and_flush(), then the arch part can do
> what's needed to get the final pte value. (if a single page is modified,
> otherwise the arch can define a suitable mmu_gather)

mmu_gather is the hook.  ia64 for instance can create a gather that uses 
the hardware tlb flush instruction to shootdown the entry across all cpus 
and eliminates the race.

		-ben