From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Schwebel Date: Wed, 12 Aug 2009 07:47:53 +0000 Subject: Re: Patch "page-allocator: preserve PFN ordering when __GFP_COLD Message-Id: <20090812074753.GL13320@pengutronix.de> List-Id: References: <200908111830.03224.jbe@pengutronix.de> In-Reply-To: <200908111830.03224.jbe@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Juergen Beisert Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.arm.linux.org.uk, linux-hotplug@vger.kernel.org, Mel Gorman Hi J=FCrgen, adding the patch author to Cc: ... rsc On Tue, Aug 11, 2009 at 06:30:02PM +0200, Juergen Beisert wrote: > Hi, >=20 > I get the following Ooops message when "udevadm" is running on an ARM S3C= 2440 > CPU based system: >=20 > [...] > starting udevd...done > Unable to handle kernel paging request at virtual address e3540000 > pgd =3D c39d4000 > [e3540000] *pgd=00000000 > Internal error: Oops: 5 [#1] > Modules linked in: > CPU: 0 Not tainted (2.6.31-rc4-00296-ge084b2d-dirty #10) > PC is at strlen+0xc/0x20 > LR is at kobject_get_path+0x24/0xa4 > pc : [] lr : [] psr: a0000013 > sp : c39bdea0 ip : 00000005 fp : c029645b > r10: c02e0430 r9 : 00000000 r8 : c3802c60 > r7 : c001de30 r6 : 000000d0 r5 : 00000001 r4 : c001de30 > r3 : e3550001 r2 : e3540000 r1 : 000000d0 r0 : e3540000 > Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user > Control: c000717f Table: 339d4000 DAC: 00000015 > Process udevadm (pid: 325, stack limit =3D 0xc39bc270) > Stack: (0xc39bdea0 to 0xc39be000) > dea0: c001de28 00000003 c393d778 c399d000 c3802c60 c014dce0 c029645b c011= 2200 > dec0: c393d778 00000000 00000003 c393d780 c399d000 c0112400 00000000 0002= 0001 > dee0: c0307fdc 00000000 c3950960 c027ddc3 c380cda0 c343b3d4 c3811e60 0000= 0000 > df00: 00000000 c393d778 00000003 c3960520 c393d780 c02e0470 c3960538 c39b= df88 > df20: 00019cb0 c014dd80 c382db20 00000000 c3960538 c38ede7c 00000003 c014= d464 > df40: c38ede7c c00bf224 c382db20 00019cb0 c39bdf88 00000004 00000003 c39b= c000 > df60: 00000000 c0080bd8 c343b3d4 00000020 00000000 00000000 c382db20 0000= 0004 > df80: c0022fa8 c0080d38 00000000 00000000 bead3250 00000000 00026d98 0000= 0003 > dfa0: bead3250 c0022e00 00026d98 00000003 00000003 00019cb0 00000003 0000= 0000 > dfc0: 00026d98 00000003 bead3250 00000004 00022a90 bead3678 00019cb0 0001= 9cb0 > dfe0: 00022a94 bead3250 00018114 400d8f1c 40000010 00000003 00000000 0000= 0000 > [] (strlen+0xc/0x20) from [] (kobject_get_path+0x24/0= xa4) > [] (kobject_get_path+0x24/0xa4) from [] (dev_uevent+0= x1dc/0x208) > [] (dev_uevent+0x1dc/0x208) from [] (kobject_uevent_e= nv+0x18c/0x3a8) > [] (kobject_uevent_env+0x18c/0x3a8) from [] (store_ue= vent+0x74/0x88) > [] (store_uevent+0x74/0x88) from [] (dev_attr_store+0= x20/0x28) > [] (dev_attr_store+0x20/0x28) from [] (sysfs_write_fi= le+0x104/0x13c) > [] (sysfs_write_file+0x104/0x13c) from [] (vfs_write+= 0xb0/0x15c) > [] (vfs_write+0xb0/0x15c) from [] (sys_write+0x40/0x6= c) > [] (sys_write+0x40/0x6c) from [] (ret_fast_syscall+0x= 0/0x2c) > Code: c02dbe78 e1a02000 ea000000 e2800001 (e5d03000) > ---[ end trace 4d391449ae70e71a ]--- > Segmentation fault > [...] >=20 > This Oops does not occure in v2.6.31-rc4 and occures in v2.6.31-rc5. Bise= cted > to the commit: >=20 > e084b2d95e48b31aa45f9c49ffc6cdae8bdb21d4 > "page-allocator: preserve PFN ordering when __GFP_COLD is set" >=20 > But its curious: The same binary kernel still runs without this oops on a= n ARM > S3C2410 CPU. >=20 > Regards, > Juergen >=20 > --=20 > Pengutronix e.K. | Juergen Beisert = | > Linux Solutions for Science and Industry | Phone: +49-8766-939 228 = | > Vertretung Sued/Muenchen, Germany | Fax: +49-5121-206917-55= 55 | > Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de= / | > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >=20 --=20 Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |