Re: [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread

2020-11-10 Thread Thomas Gleixner
On Mon, Nov 09 2020 at 20:59, Ira Weiny wrote: > On Tue, Nov 10, 2020 at 02:13:56AM +0100, Thomas Gleixner wrote: > Also, we can convert the new memcpy_*_page() calls to kmap_local() as well. > [For now my patch just uses kmap_atomic().] > > I've not looked at all of the patches in your latest vers

Re: [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread

2020-11-09 Thread Ira Weiny
On Tue, Nov 10, 2020 at 02:13:56AM +0100, Thomas Gleixner wrote: > Ira, > > On Fri, Oct 09 2020 at 12:49, ira weiny wrote: > > From: Ira Weiny > > > > To correctly support the semantics of kmap() with Kernel protection keys > > (PKS), kmap() may be required to set the protections on multiple > >

Re: [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread

2020-11-09 Thread Thomas Gleixner
Ira, On Fri, Oct 09 2020 at 12:49, ira weiny wrote: > From: Ira Weiny > > To correctly support the semantics of kmap() with Kernel protection keys > (PKS), kmap() may be required to set the protections on multiple > processors (globally). Enabling PKS globally can be very expensive > depending o

[PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread

2020-10-09 Thread ira . weiny
From: Ira Weiny To correctly support the semantics of kmap() with Kernel protection keys (PKS), kmap() may be required to set the protections on multiple processors (globally). Enabling PKS globally can be very expensive depending on the requested operation. Furthermore, enabling a domain globa