From owner-freebsd-current@FreeBSD.ORG Mon Mar 10 15:51:19 2014 Return-Path: Delivered-To: freebsd-current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 7EEC62AF; Mon, 10 Mar 2014 15:51:19 +0000 (UTC) Received: from mail0.glenbarber.us (mail0.glenbarber.us [208.86.227.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 50875A1A; Mon, 10 Mar 2014 15:51:19 +0000 (UTC) Received: from glenbarber.us (70.15.88.86.res-cmts.sewb.ptd.net [70.15.88.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) (Authenticated sender: gjb) by mail0.glenbarber.us (Postfix) with ESMTPSA id BAC72261A; Mon, 10 Mar 2014 15:51:17 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.8.3 mail0.glenbarber.us BAC72261A Authentication-Results: mail0.glenbarber.us; dkim=none reason="no signature"; dkim-adsp=none Date: Mon, 10 Mar 2014 11:51:15 -0400 From: Glen Barber To: Konstantin Belousov Subject: Re: panic: vm_fault: fault on nofault entry Message-ID: <20140310155115.GH1746@glenbarber.us> References: <20140309165648.GF1776@glenbarber.us> <20140309180132.GO24664@kib.kiev.ua> <20140309181657.GI1776@glenbarber.us> <20140310154606.GQ24664@kib.kiev.ua> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="9sSKoi6Rw660DLir" Content-Disposition: inline In-Reply-To: <20140310154606.GQ24664@kib.kiev.ua> X-Operating-System: FreeBSD 11.0-CURRENT amd64 X-SCUD-Definition: Sudden Completely Unexpected Dataloss X-SULE-Definition: Sudden Unexpected Learning Event User-Agent: Mutt/1.5.22 (2013-10-16) Cc: freebsd-current@FreeBSD.org X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Mar 2014 15:51:19 -0000 --9sSKoi6Rw660DLir Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Mar 10, 2014 at 05:46:06PM +0200, Konstantin Belousov wrote: > On Sun, Mar 09, 2014 at 02:16:57PM -0400, Glen Barber wrote: > > panic: vm_fault: fault on nofault entry, addr: fffffe03becbc000 >=20 > I see, this panic is for access to the kernel map, not for the direct map. > I think that this is a race with other CPU unmapping some page in the > kernel map, which cannot be solved by access checks. >=20 > Please try the following. I booted with the patch and checked that > kgdb /boot/kernel/kernel /dev/mem works, but did not tried to reproduce > the issue. >=20 Thank you for looking into this. I will report back. Glen --9sSKoi6Rw660DLir Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQIcBAEBCAAGBQJTHd9zAAoJELls3eqvi17QUwcP/ib8smmpujNSg8oAYd4SVzVM DYx0/NpUamGJnaslIk3SxdgeC0y5kyyYC5HlG8zbZSndmDmBTh5P49Hl7GkbO021 cn+344fr2OwvT11iPAl2oSxq+mp0CvqI9qdCDmnoSIOcB5ADo7b0zL+L/W4QFE5T 54rle6b0fbSbEEoQizQaNYWPUv81TZMJCI+nkxMYbN9wA/B8LLU52ekX4at4EZGy L/Sr9WXPtbdGv5AyUJIBUlnLBKu3rerZMFXHjoPJ1/N5+BmT7rWLFhZrQ545EjVd 1uPl+ufSu9OzDv/kXl1W3adHjd4vvmcuP/q5VZmZ3u44JQ2iUnleiyxqxnPUvyNB EyMjMFfRXbzR+HtRi0rU4y8aT1uUcEkwXEjVC2en4vBQ5Ma5DiiqiLoAGihdxirh CnDp0Yt1s+gFLAdmaLRTvVYxNZ3Do3lIPDGQ/3+Hk+U2PVl+GtM2TzGnrPwiqgaY llrXgc+cq9qYcdhU9QZJnUOQNvNrGq75AJOizeIRY3gJDvKAabWRjr9RdrdT+PDW YOxOy+o+NnWomIhBPH9P0uQYwrDjmctRK+d77dLAiKM7/sT3s6xZ2PwuuHz+iM7+ iyLSQIslIDzFIlO+FGxVBU51KY2q8Hg3EQ3OyH612qQhs3QGaM8AwDL+Spv7omEM UD4a+fjov6z6k1AXgwuS =zHII -----END PGP SIGNATURE----- --9sSKoi6Rw660DLir--