From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: PROBLEM: write to jbod with 3TB and 160GB drives hits BUG/oops Date: Fri, 24 Apr 2015 11:55:11 +1000 Message-ID: <20150424115511.2bd1cde4@notabene.brown> References: <55398462.1000202@cox.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/32UPxLLIIHoNe69+k2XiY4S"; protocol="application/pgp-signature" Return-path: In-Reply-To: <55398462.1000202@cox.net> Sender: linux-raid-owner@vger.kernel.org To: Charles Bertsch Cc: linux-raid@vger.kernel.org, "BertschC@acm.org" List-Id: linux-raid.ids --Sig_/32UPxLLIIHoNe69+k2XiY4S Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Thu, 23 Apr 2015 16:46:42 -0700 Charles Bertsch wrote: > 1. PROBLEM: write to jbod with 3TB and 160GB drives hits BUG/oops >=20 > 2. Description. Using linux-3.18.5, linux-3.18.7, and linux-4.0 a=20 > two-drive jbod created using one 3TB drive and one 160GB drive will=20 > SOMETIMES hit a BUG call at linux-4.0/fs/buffer.c:3220 By "jbod" I assume you mean "linear array". You say this happens without any filesystem on the array, yet the stack traces clearly show ext2 in use. Maybe some weird interaction is happening between the the filesystem and the linear array. But please confirm that the stack trace happened when there was no filesyst= em on the array you were testing, and report what filesystems you do have which use ext2. Is there any chance you could use "git bisect" to find out exactly which commit introduced the problem? That is the mostly likely path to a solutio= n. Thanks for the report, NeilBrown --Sig_/32UPxLLIIHoNe69+k2XiY4S Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIVAwUBVTmifznsnt1WYoG5AQIVSg/9Fizq4P+O3+azdeCw/fBttQ0T6wU4La9u uC1yjcUpPUne3n5MaRTsusRBoaM6fC2wEr83TRVqGnefR+Hopbmr7o79kFBkLlMZ i41ZIypaC+a4PQQzwE4f+AMvltP5w+MvdLF61NgK4xGXOJRfOZ/WwDw8Oke3THnV 6iTsXvCCRCd8EtQXaVNpAm/xaig5u9o5tNvfZfoqx7XVWUU9E7N16/DL3jncp8Lp I3tZyEpQ9YreEiWOlKDsfz58qJV1iTx4fBz8OiKclzmUJ9PAcZvPSNAImoez4+7w p1kA+feCcCmSeeMwYBrC04pgyI0EyfutwAyUhOOvK+yNNlh9zhPCA7YspupT3RDI sjwuqsEWPHR74iGsd+dD5Ta3xNGIVLxGrPyLJ07CwYRI+d5DCFdWid8b7B/mVMz3 /xauJDGE4MSM5ep+8c9Rn3RejEtuGIJJgsdWGW5YwzOqvE9nVs98pUOIyABW7Xkj AW9MrPBAW6LKXQbif5OhoBf0ca7bKUnP7l6vKyCzq5BMQVyFQ3DRBsbYYoZyHeTv BDeFP3tBuTYpp7D5Z6PvEAmjBqAxYQVUFh2tfXoJ00fVOsdezua4XBV3Rvdz975g dvTgG1Enld7jj/vIhpsApmSlPPWzICOJGU+5ocrRgd6e92zGgJYoRYKNeCv6HPaF tR+IcGabMW4= =qYps -----END PGP SIGNATURE----- --Sig_/32UPxLLIIHoNe69+k2XiY4S--