On 8/28/19 7:24 AM, Thomas Gleixner wrote: > From: Song Liu <songliubrav...@fb.com> > > pti_clone_pmds() assumes that the supplied address is either: > > - properly PUD/PMD aligned > or > - the address is actually mapped which means that independent > of the mapping level (PUD/PMD/PTE) the next higher mapping > exist. > > If that's not the case the unaligned address can be incremented by PUD or > PMD size wrongly. All callers supply mapped and/or aligned addresses, but > for robustness sake, it's better to handle that case proper and to emit a > warning.
Reviewed-by: Dave Hansen <dave.han...@linux.intel.com> Song, did you ever root-cause the performance regression? I thought there were still some mysteries there.
