> To elaborate on this one... I realise for this one that in the kernel
> where this is currently used everything is non-preemptible anyway
> because of the ptl. And I also realise that -rt kernel issues don't
> really have a bearing on mainline kernel.. but the generic
> implementation of this AP
On Mon, 2007-07-09 at 20:12 +1000, Nick Piggin wrote:
> Benjamin Herrenschmidt wrote:
> > On Mon, 2007-07-09 at 19:29 +1000, Nick Piggin wrote:
> >
> >>They could just #define one to the other though, there are only a
> >>small
> >>number of them. Is there a downside to not making them distinct? i
Nick Piggin wrote:
Benjamin Herrenschmidt wrote:
On Mon, 2007-07-09 at 19:29 +1000, Nick Piggin wrote:
They could just #define one to the other though, there are only a
small
number of them. Is there a downside to not making them distinct? i386
for example probably would just keep doing a tlb
Benjamin Herrenschmidt wrote:
On Mon, 2007-07-09 at 19:29 +1000, Nick Piggin wrote:
They could just #define one to the other though, there are only a
small
number of them. Is there a downside to not making them distinct? i386
for example probably would just keep doing a tlb flush for fork and
n
On Mon, 2007-07-09 at 19:29 +1000, Nick Piggin wrote:
> They could just #define one to the other though, there are only a
> small
> number of them. Is there a downside to not making them distinct? i386
> for example probably would just keep doing a tlb flush for fork and
> not
> want to worry about
Benjamin Herrenschmidt wrote:
On Mon, 2007-07-09 at 17:39 +1000, Nick Piggin wrote:
Would it be better off to start off with a new API for this? The
mmu gather I think is traditionally entirely for dealing with
page removal...
It would be weird because the new API would mostly duplicate thi
On Mon, 2007-07-09 at 17:39 +1000, Nick Piggin wrote:
> Would it be better off to start off with a new API for this? The
> mmu gather I think is traditionally entirely for dealing with
> page removal...
It would be weird because the new API would mostly duplicate this one,
and we would end up wit
Benjamin Herrenschmidt wrote:
Use mmu_gather for fork() instead of flush_tlb_mm()
This patch uses an mmu_gather for copying page tables instead of
flush_tlb_mm(). This allows archs like ppc32 with hash table to
avoid walking the page tables a second time to invalidate hash
entries, and to only f
Use mmu_gather for fork() instead of flush_tlb_mm()
This patch uses an mmu_gather for copying page tables instead of
flush_tlb_mm(). This allows archs like ppc32 with hash table to
avoid walking the page tables a second time to invalidate hash
entries, and to only flush PTEs that have actually bee
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