On 07/07/2016 07:40 AM, Mel Gorman wrote: > On Thu, Jul 07, 2016 at 05:47:20AM -0700, Dave Hansen wrote: >> From: Dave Hansen <dave.han...@linux.intel.com> >> PF_PK means that a memory access violated the protection key >> access restrictions. It is unconditionally an access_error() >> because the permissions set on the VMA don't matter (the PKRU >> value overrides it), and we never "resolve" PK faults (like >> how a COW can "resolve write fault). >> >> Signed-off-by: Dave Hansen <dave.han...@linux.intel.com> > > An access fault gets propgated as SEGV_PKUERR. What happens if glibc > does not recognise it?
It passes it through to the handler without any side-effects. I don't think it does anything differently with SEGV_* codes that it knows about vs. unknown ones. The only negative side-effect that I can think of is that it won't have a nice error message for it.
