On Wed, 22 Aug 2018, Paul Menzel wrote:
> Am 21.08.2018 um 11:37 schrieb Paul Menzel:
> > [Removed non-working Pavel Tatashin <pasha.tatashin@oracle.com>]
> 
> So a??freea??inga?? pfn = 225278 to e_pfn = 818492 in the for loop takes 160 ms.

That's 593214 pages and each one takes about 270ns. I don't see much
optimization potential with that.

32bit and highmem sucks ...