From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f178.google.com (mail-pf0-f178.google.com [209.85.192.178]) by kanga.kvack.org (Postfix) with ESMTP id 42B6A6B0005 for ; Tue, 29 Mar 2016 14:32:45 -0400 (EDT) Received: by mail-pf0-f178.google.com with SMTP id n5so21428548pfn.2 for ; Tue, 29 Mar 2016 11:32:45 -0700 (PDT) Received: from mail.crc.id.au (mail.crc.id.au. [203.56.246.92]) by mx.google.com with ESMTP id t9si60223pfa.9.2016.03.29.11.32.43 for ; Tue, 29 Mar 2016 11:32:44 -0700 (PDT) Received: from [10.1.1.197] (dhcp-10-1-1-197.lan.crc.id.au [10.1.1.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.crc.id.au (Postfix) with ESMTPSA id 591FD3A0063 for ; Wed, 30 Mar 2016 05:32:40 +1100 (AEDT) Subject: Re: 4.4: INFO: rcu_sched self-detected stall on CPU References: <56F4A816.3050505@crc.id.au> <56F52DBF.5080006@oracle.com> <56F545B1.8080609@crc.id.au> <56F54EE0.6030004@oracle.com> <56F56172.9020805@crc.id.au> <56F5653B.1090700@oracle.com> <56F5A87A.8000903@crc.id.au> <56FA4336.2030301@crc.id.au> <56FA8DDD.7070406@oracle.com> <56FABF17.7090608@crc.id.au> <56FAC3AC.9050802@crc.id.au> From: Steven Haigh Message-ID: <56FACA47.3050904@crc.id.au> Date: Wed, 30 Mar 2016 05:32:39 +1100 MIME-Version: 1.0 In-Reply-To: <56FAC3AC.9050802@crc.id.au> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="WCC2A9TtQLfd42otdl3uLxKDxn1WBgqNd" Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --WCC2A9TtQLfd42otdl3uLxKDxn1WBgqNd Content-Type: multipart/mixed; boundary="0xAtvMgUD3cva9pEDf3cht7RXptSRtdaj" From: Steven Haigh To: linux-mm@kvack.org Message-ID: <56FACA47.3050904@crc.id.au> Subject: Re: 4.4: INFO: rcu_sched self-detected stall on CPU References: <56F4A816.3050505@crc.id.au> <56F52DBF.5080006@oracle.com> <56F545B1.8080609@crc.id.au> <56F54EE0.6030004@oracle.com> <56F56172.9020805@crc.id.au> <56F5653B.1090700@oracle.com> <56F5A87A.8000903@crc.id.au> <56FA4336.2030301@crc.id.au> <56FA8DDD.7070406@oracle.com> <56FABF17.7090608@crc.id.au> <56FAC3AC.9050802@crc.id.au> In-Reply-To: <56FAC3AC.9050802@crc.id.au> --0xAtvMgUD3cva9pEDf3cht7RXptSRtdaj Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable After talking to Greg KH, I believe that this should be best directed to this list. Please feel free to give me pointers if I'm wrong here. On 30/03/2016 5:04 AM, Steven Haigh wrote: > Greg, please see below - this is probably more for you... >=20 > On 03/29/2016 04:56 AM, Steven Haigh wrote: >> >> Interestingly enough, this just happened again - but on a different >> virtual machine. I'm starting to wonder if this may have something to = do >> with the uptime of the machine - as the system that this seems to happ= en >> to is always different. >> >> Destroying it and monitoring it again has so far come up blank. >> >> I've thrown the latest lot of kernel messages here: >> http://paste.fedoraproject.org/346802/59241532 >=20 > So I just did a bit of digging via the almighty Google. >=20 > I started hunting for these lines, as they happen just before the stall= : > BUG: Bad rss-counter state mm:ffff88007b7db480 idx:2 val:-1 > BUG: Bad rss-counter state mm:ffff880079c638c0 idx:0 val:-1 > BUG: Bad rss-counter state mm:ffff880079c638c0 idx:2 val:-1 >=20 > I stumbled across this post on the lkml: > http://marc.info/?l=3Dlinux-kernel&m=3D145141546409607 >=20 > The patch attached seems to reference the following change in > unmap_mapping_range in mm/memory.c: >> - struct zap_details details; >> + struct zap_details details =3D { }; >=20 > When I browse the GIT tree for 4.4.6: > https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tr= ee/mm/memory.c?id=3Drefs/tags/v4.4.6 >=20 > I see at line 2411: > struct zap_details details; >=20 > Is this something that has been missed being merged into the 4.4 tree? > I'll admit my kernel knowledge is not enough to understand what the cod= e > actually does - but the similarities here seem uncanny. >=20 >=20 >=20 > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel >=20 --=20 Steven Haigh Email: netwiz@crc.id.au Web: https://www.crc.id.au Phone: (03) 9001 6090 - 0412 935 897 --0xAtvMgUD3cva9pEDf3cht7RXptSRtdaj-- --WCC2A9TtQLfd42otdl3uLxKDxn1WBgqNd Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJW+spHAAoJEEGvNdV6fTHcsPgP/07YHX6lE2/M+vp89G34ZIXR YWTXL67YUk0iyKOG97mIWoWPEhO9Xx2eobIcs23B5ReVcngfu553e6lQsv5SmP59 nRrYLW1Gm4TfHq3WR2BL/tsW853vxX/LaYgXMHcKIzdNKm6+kYwZ5hqtu7GuLgDt TmSRvlHB+ceS6ez5YzPyZ92B3p2UeRaMBkqBOX/zM1/n5rSoR3gX3hFdQKCb3DRs 3vFQQAczSD43EdP7Hi8dATOG4hV+Xwck4Vxag6K4FghCcPFQgZ0kzo6A+xEMpxsQ pfZoB8jy9jYe966855u7iF3IuNFIWxYZ6KYnRvlU/cqsse0GFlYEkh6exr6hutEh oYueH7I334FclPwrrcz/MbjUod9HlOweN21D3ALRhYa8S/eq0OFaskN7aq3rGvke Y7aJOZiqsDV3Pl29+S1AI9R77PPizfO0KHKt7K5WECP54/wqLBOLi4l2skocWuaR VFo0/Fd2VcJ7MOj2J/6v2HQHI/W7lx5CZuJXPes8oSCdRRbLeLneT4XdUINAcwq4 Jyuj4VyKVGSLN/CpJ7RtOo3fIkuCvbp8mlPiHwHLHYiCfrr+YD3smLgq1/v0tEij seJ55jin9KJH5S6+KewSuS2TLlG9UFvu3Bd9j7MJnuYMPYWCS/SuNdj88HYP/1n3 CTdvFBtPGi33AgQ5dnnm =SY6G -----END PGP SIGNATURE----- --WCC2A9TtQLfd42otdl3uLxKDxn1WBgqNd-- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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