Date: Mon, 20 Aug 2018 18:09:04 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Michael Gmelin <freebsd@grem.de> Cc: John Baldwin <jhb@FreeBSD.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>, Matthias Apitz <guru@unixarea.de> Subject: Re: Fatal trap 12: page fault on Acer Chromebook 720 (peppy) Message-ID: <20180820150904.GS2340@kib.kiev.ua> In-Reply-To: <20180820004512.5171fa75@bsd64.grem.de> References: <20180815130447.GZ2340@kib.kiev.ua> <C26CD25D-3CB0-4F7E-8B50-F7E95E16B776@grem.de> <20180815135531.GA2340@kib.kiev.ua> <FAEA5B0A-5302-4A48-B322-21CB0D97C8CC@grem.de> <e82ed552-83b0-5331-3117-6750b8c205f7@FreeBSD.org> <07E28AC5-EBE6-4893-810A-6C03F07925C8@grem.de> <8726bc32-6023-bfe1-7600-5b2c706236f8@FreeBSD.org> <20180819165951.274d61b0@bsd64.grem.de> <20180819161642.GP2340@kib.kiev.ua> <20180820004512.5171fa75@bsd64.grem.de>
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On Mon, Aug 20, 2018 at 12:45:12AM +0200, Michael Gmelin wrote: > > See here for a screenshot (also including the output of "show pte > 0xfffff80001000000"): > > https://gist.github.com/grembo/78d0f2a100dd4f16775b85a118769658#file-ddb1-png It is too early for ddb routines to register. Ok can you try the following debugging patch, to verify my guess ? diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index 18777d23f09..cd05fdb763f 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -1052,8 +1052,7 @@ create_pagetables(vm_paddr_t *firstaddr) pd_p = (pd_entry_t *)DMPDkernphys; for (i = 0; i < (NPDEPG * nkdmpde); i++) pd_p[i] = (i << PDRSHIFT) | X86_PG_V | PG_PS | pg_g | - X86_PG_M | X86_PG_A | pg_nx | - bootaddr_rwx(i << PDRSHIFT); + X86_PG_M | X86_PG_A | pg_nx | X86_PG_RW; for (i = 0; i < nkdmpde; i++) pdp_p[i] = (DMPDkernphys + ptoa(i)) | X86_PG_RW | X86_PG_V;
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