On Mon, Nov 25, 2019 at 08:36:25AM +0530, Bharata B Rao wrote: > On PEF-enabled POWER platforms that support running of secure guests, > secure pages of the guest are represented by device private pages > in the host. Such pages needn't participate in KSM merging. This is > achieved by using ksm_madvise() call which need to be exported > since KVM PPC can be a kernel module. > > Signed-off-by: Bharata B Rao <bharata@xxxxxxxxxxxxx> > Acked-by: Paul Mackerras <paulus@xxxxxxxxxx> > Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> > Cc: Hugh Dickins <hughd@xxxxxxxxxx> Just want to point out that I observe a kernel crash when KSM is dealing with device private pages. More details about the crash here: https://lore.kernel.org/linuxppc-dev/20191115141006.GA21409@xxxxxxxxxx/ Regards, Bharata.
