Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751390AbaLEQfR (ORCPT ); Fri, 5 Dec 2014 11:35:17 -0500 Received: from service87.mimecast.com ([91.220.42.44]:43543 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751112AbaLEQfP convert rfc822-to-8bit (ORCPT ); Fri, 5 Dec 2014 11:35:15 -0500 Date: Fri, 5 Dec 2014 16:35:11 +0000 From: Liviu Dudau To: Alexander Graf Cc: "linux-kernel@vger.kernel.org" , Catalin Marinas , Will Deacon , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH] arm64: Enable CONFIG_COMPAT also for 64k page size Message-ID: <20141205163511.GM821@e106497-lin.cambridge.arm.com> References: <1417707993-82290-1-git-send-email-agraf@suse.de> MIME-Version: 1.0 In-Reply-To: <1417707993-82290-1-git-send-email-agraf@suse.de> User-Agent: Mutt/1.5.22 (2013-10-16) X-OriginalArrivalTime: 05 Dec 2014 16:35:12.0583 (UTC) FILETIME=[710B5570:01D010A9] X-MC-Unique: 114120516351310901 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 04, 2014 at 03:46:33PM +0000, Alexander Graf wrote: > With binutils 2.25 the default alignment for 32bit arm sections changed to > have everything 64k aligned. Armv7 binaries built with this binutils version > run successfully on an arm64 system. > > Since effectively there is now the chance to run armv7 code on arm64 even > with 64k page size, it doesn't make sense to block people from enabling > CONFIG_COMPAT on those configurations. > > Signed-off-by: Alexander Graf > --- > arch/arm64/Kconfig | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 9532f8d..3cf4f238 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -409,7 +409,6 @@ source "fs/Kconfig.binfmt" > > config COMPAT > bool "Kernel support for 32-bit EL0" > - depends on !ARM64_64K_PAGES > select COMPAT_BINFMT_ELF > select HAVE_UID16 > select OLD_SIGSUSPEND3 > -- > 1.7.12.4 > Hi Alexander, For what is worth, today's linux-next (20141204) does not boot on arm64 if I select CONFIG_ARM64_64K_PAGES. ext4 filesystem fails to mount with: hub 1-1:1.0: USB hub found hub 1-1:1.0: 4 ports detected usb 1-1.2: new high-speed USB device number 3 using ehci-platform usb-storage 1-1.2:1.0: USB Mass Storage device detected scsi host0: usb-storage 1-1.2:1.0 atkbd serio0: keyboard reset failed on 1c060000.kmi Waiting for root device /dev/sda3... usb 1-1.1: new low-speed USB device number 4 using ehci-platform input: USB Keyboard as /devices/platform/7ffc0000.ehci/usb1/1-1/1-1.1/1-1.1:1.0/0003:0DC6:3910.0001/input/input2 hid-generic 0003:0DC6:3910.0001: input: USB HID v1.00 Keyboard [USB Keyboard] on usb-7ffc0000.ehci-1.1/input0 input: USB Keyboard as /devices/platform/7ffc0000.ehci/usb1/1-1/1-1.1/1-1.1:1.1/0003:0DC6:3910.0002/input/input3 hid-generic 0003:0DC6:3910.0002: input: USB HID v1.00 Mouse [USB Keyboard] on usb-7ffc0000.ehci-1.1/input1 atkbd serio1: keyboard reset failed on 1c070000.kmi scsi 0:0:0:0: Direct-Access Toshiba StorE HDD 0000 PQ: 0 ANSI: 4 sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 38 00 00 00 sd 0:0:0:0: [sda] No Caching mode page found sd 0:0:0:0: [sda] Assuming drive cache: write through sda: sda1 sda2 sda3 sd 0:0:0:0: [sda] Attached SCSI disk EXT3-fs (sda3): error: couldn't mount because of unsupported optional features (240) EXT2-fs (sda3): error: couldn't mount because of unsupported optional features (240) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 128 failed (15930!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 129 failed (54075!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 130 failed (42043!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 131 failed (18746!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 132 failed (19003!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 133 failed (42810!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 134 failed (53306!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 135 failed (15675!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 136 failed (54840!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 137 failed (15161!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 138 failed (19513!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 139 failed (41272!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 140 failed (41529!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 141 failed (20280!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 142 failed (14392!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 143 failed (54585!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 144 failed (44605!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 145 failed (17212!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 146 failed (13372!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 147 failed (55613!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 148 failed (55868!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 149 failed (14141!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 150 failed (16445!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 151 failed (44348!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 152 failed (17983!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 153 failed (43838!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 154 failed (56382!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 155 failed (12607!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 156 failed (12862!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 157 failed (57151!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 158 failed (43071!=0) EXT4-fs (sda3): ext4_check_descriptors: Checksum for group 159 failed (17726!=0) EXT4-fs (sda3): ext4_check_descriptors: Inode bitmap for group 160 not in group (block 89328390)! EXT4-fs (sda3): group descriptors corrupted! List of all partitions: b300 1931264 mmcblk0 driver: mmcblk b301 1930240 mmcblk0p1 00000000-01 0800 488386584 sda driver: sd 0801 125829120 sda1 00000000-01 0802 5242880 sda2 00000000-02 0803 357313560 sda3 00000000-03 No filesystem could mount root, tried: ext3 ext2 ext4 vfat fuseblk Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,3) CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc7-next-20141204+ #1 Same filesystem (no fsck inbetween) but with a 4K pages kernel boots fine. Best regards, Liviu -- ==================== | I would like to | | fix the world, | | but they're not | | giving me the | \ source code! / --------------- ¯\_(ツ)_/¯ -- 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/