On 12/17/19 2:28 PM, Peter Zijlstra wrote:
On Tue, Dec 17, 2019 at 12:47:13PM +0530, Aneesh Kumar K.V wrote:
On tlb_finish_mmu() kernel does a tlb flush before mmu gather table invalidate.
The mmu gather table invalidate depending on kernel config also does another
TLBI. Avoid the later on tlb_finish_mmu().
That is already avoided, if you look at tlb_flush_mmu_tlbonly() it does
__tlb_range_reset(), which results in ->end = 0, which then triggers the
early exit on the next invocation:
if (!tlb->end)
return;
Is that true for tlb->fulmm flush?
-aneesh
