On Sun 2017-09-17 11:19:53, tip-bot for Andy Lutomirski wrote: > Commit-ID: 4ba55e65f471d011d3ba2ac2022180ea0877d68e > Gitweb: http://git.kernel.org/tip/4ba55e65f471d011d3ba2ac2022180ea0877d68e > Author: Andy Lutomirski <l...@kernel.org> > AuthorDate: Sun, 17 Sep 2017 09:03:51 -0700 > Committer: Ingo Molnar <mi...@kernel.org> > CommitDate: Sun, 17 Sep 2017 18:59:09 +0200 > > x86/mm/32: Load a sane CR3 before cpu_init() on secondary CPUs > > For unknown historical reasons (i.e. Borislav doesn't recall), > 32-bit kernels invoke cpu_init() on secondary CPUs with > initial_page_table loaded into CR3. Then they set > current->active_mm to &init_mm and call enter_lazy_tlb() before > fixing CR3. This means that the x86 TLB code gets invoked while CR3 > is inconsistent, and, with the improved PCID sanity checks I added, > we warn. > > Fix it by loading swapper_pg_dir (i.e. init_mm.pgd) earlier. > > Reported-by: Paul Menzel <pmen...@molgen.mpg.de> > Reported-by: Pavel Machek <pa...@ucw.cz>
4.14.0-rc1-next-20170919 does not produce the warning during bootup.
Pavel
Tested-by: Pavel Machek <pa...@ucw.cz>
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