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[194.107.17.57]) by mx.google.com with ESMTP id h17si26560970lja.223.2019.07.17.16.30.31 for ; Wed, 17 Jul 2019 16:30:32 -0700 (PDT) Received-SPF: pass (google.com: domain of ldv@altlinux.org designates 194.107.17.57 as permitted sender) client-ip=194.107.17.57; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ldv@altlinux.org designates 194.107.17.57 as permitted sender) smtp.mailfrom=ldv@altlinux.org Received: from mua.local.altlinux.org (mua.local.altlinux.org [192.168.1.14]) by vmicros1.altlinux.org (Postfix) with ESMTP id 8897B72CCD6; Thu, 18 Jul 2019 02:30:31 +0300 (MSK) Received: by mua.local.altlinux.org (Postfix, from userid 508) id 6F6307CCE5C; Thu, 18 Jul 2019 02:30:31 +0300 (MSK) Date: Thu, 18 Jul 2019 02:30:31 +0300 From: "Dmitry V. Levin" To: Linus Torvalds Cc: Christoph Hellwig , Khalid Aziz , Andrew Morton , "David S. Miller" , Anatoly Pugachev , sparclinux@vger.kernel.org, Linux-MM , Linux List Kernel Mailing Subject: Re: [PATCH 09/16] sparc64: use the generic get_user_pages_fast code Message-ID: <20190717233031.GB30369@altlinux.org> References: <20190625143715.1689-1-hch@lst.de> <20190625143715.1689-10-hch@lst.de> <20190717215956.GA30369@altlinux.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="eJnRUKwClWJh1Khz" Content-Disposition: inline In-Reply-To: X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --eJnRUKwClWJh1Khz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jul 17, 2019 at 03:04:56PM -0700, Linus Torvalds wrote: > On Wed, Jul 17, 2019 at 2:59 PM Dmitry V. Levin wrote: > > > > So this ended up as commit 7b9afb86b6328f10dc2cad9223d7def12d60e505 > > (thanks to Anatoly for bisecting) and introduced a regression: > > futex.test from the strace test suite now causes an Oops on sparc64 > > in futex syscall. >=20 > Can you post the oops here in the same thread too? Maybe it's already > posted somewhere else, but I can't seem to find anything likely on > lkml at least.. Sure, here it is: [ 514.137217] Unable to handle kernel paging request at virtual address 00= 060000541d0000 [ 514.137295] tsk->{mm,active_mm}->context =3D 00000000000005b2 [ 514.137343] tsk->{mm,active_mm}->pgd =3D fff80024955a2000 [ 514.137387] \|/ ____ \|/ "@'/ .. \`@" /_| \__/ |_\ \__U_/ [ 514.137493] futex(1599): Oops [#1] [ 514.137533] CPU: 26 PID: 1599 Comm: futex Not tainted 5.2.0-05721-gd3649= f68b433 #1096 [ 514.137595] TSTATE: 0000000011001603 TPC: 000000000051adc4 TNPC: 0000000= 00051adc8 Y: 00000000 Not tainted [ 514.137678] TPC: [ 514.137712] g0: 0000000000000000 g1: 0000000000e75178 g2: 000000000009a2= 1d g3: 0000000000000000 [ 514.137769] g4: fff8002474fbc0e0 g5: fff80024aa80c000 g6: fff8002495aec0= 00 g7: 0000000000000200 [ 514.137825] o0: 0000000000000001 o1: 0000000000000001 o2: 00000000000000= 00 o3: fff8002495aefa28 [ 514.137882] o4: fff8000100030000 o5: fff800010002e000 sp: fff8002495aef1= 61 ret_pc: 000000000051ada4 [ 514.137944] RPC: [ 514.137978] l0: 000000000051b144 l1: 0000000000000001 l2: 0000000000c019= 50 l3: fff80024626051c0 [ 514.138036] l4: 0000000000c01970 l5: 0000000000cf6800 l6: 00060000541d13= f0 l7: 00000000014b3000 [ 514.138094] i0: 0000000000000001 i1: 000000000051af30 i2: fff8002495aefc= 28 i3: 0000000000000001 [ 514.138152] i4: 0000000000cf69b0 i5: fff800010002e000 i6: fff8002495aef2= 31 i7: 000000000051b3a8 [ 514.138211] I7: [ 514.138245] Call Trace: [ 514.138271] [000000000051b3a8] futex_wait_setup+0x28/0x120 [ 514.138313] [000000000051b550] futex_wait+0xb0/0x200 [ 514.138352] [000000000051d734] do_futex+0xd4/0xc00 [ 514.138390] [000000000051e384] sys_futex+0x124/0x140 [ 514.138435] [0000000000406294] linux_sparc_syscall+0x34/0x44 [ 514.138478] Disabling lock debugging due to kernel taint [ 514.138501] Caller[000000000051b3a8]: futex_wait_setup+0x28/0x120 [ 514.138524] Caller[000000000051b550]: futex_wait+0xb0/0x200 [ 514.138547] Caller[000000000051d734]: do_futex+0xd4/0xc00 [ 514.138568] Caller[000000000051e384]: sys_futex+0x124/0x140 [ 514.138590] Caller[0000000000406294]: linux_sparc_syscall+0x34/0x44 [ 514.138614] Caller[0000010000000e90]: 0x10000000e90 [ 514.138633] Instruction DUMP: [ 514.138635] 0640016e=20 [ 514.138650] b13da000=20 [ 514.138663] ec5fa7f7=20 [ 514.138676] [ 514.138689] ae100016=20 [ 514.138702] 84086001=20 [ 514.138714] 82007fff=20 [ 514.138727] af789401=20 [ 514.138740] f05de018=20 --=20 ldv --eJnRUKwClWJh1Khz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIcBAEBCAAGBQJdL6+XAAoJEAVFT+BVnCUItv0P/RQl7zn0jCq+B4G33r61CH0f MM3lOaEkCdZV3KhE/13PJWKFSRP2b6rh0k95kDhUNnPdItg3b4xEwHuMwHKzyzCs RdDrQ5ISjKrSwGJqrAywjpEX5Wf7JnUS98muIIWgcrfA3M3HzQMgKmVIna3SstVD ZTXmMFjnnuGSKI5xA79VBve9xPbDDkF0cPTrRIkXwk3HzTrQi9NKwj+VyFnzvri/ vXBb8oQ5OJymQryUnoeVxs2MmraXPotL+M/8krsZIoAuaK4IMFiFh5T7ZBVigqFv 934gPFbRyRdErsuiJo6PMqJUay39etJBifC4sem9zw6NcP+sSMB5L8EABFkWT0j+ VuW3foMsOIoH/+8dbYsdTsw4RHpXv6WeUwrNLXZLCWACt2M/m5wBlrBFf0NMbRW4 LtWcIzy4IYfmmUiKrVfAUNv3Yx991ah+QTeq871+Wsy2irvJuE7c4lfH6RxCOjKT CrtF6oqFcOFHZRfl4JSzc2dbd/tepmNwonQeO6WXwruxRoMI2NhL350ijQJjkXOP qhz/qutyUOk662ZP30+j0G1iT4TGERug8SLaI11eEjTpqIMUQMtPa0ATsoIkR/+x S1637lihAJh2d2ik4os1nLjDNakmc6TMgS0KcDXhfo219fWAD5YrgmQD8g7fUnLp 4bgJDOaNpCu6rzRT4WY4 =3YbY -----END PGP SIGNATURE----- --eJnRUKwClWJh1Khz--