Btrfs support imx6q based board

arulpandiyan_va — Mon, 07 Nov 2022 10:34:38 GMT

I am using imx6D based customer board, where we are wanted to use BTRFS filesystem on the system.

We have enabled below BTRFS support on u-boot

CONFIG_FS_BTRFS=y CONFIG_CMD_BTRFS=y

and in kernel below configurations.

CONFIG_BTRFS_FS=y

but while booting the device, We are getting the failures below. Could you please help us to understand what we are missing here?

U-Boot 2021.04-g8372631b-dirty (Nov 02 2022 - 11:13:15 +0000) CPU: i.MX6D rev1.6 at 792MHz CPU: Industrial temperature grade (-40C to 105C) at 41C Reset cause: POR Model: Freescale i.MX6 Quad SABRE Smart Device Board Board: MX6-CUSTOM DRAM: 1 GiB PMIC: PFUZE100! DEV_ID=0x10 REV_ID=0x21 MMC: FSL_SDHC: 1, FSL_SDHC: 2, FSL_SDHC: 3 In: serial Out: serial Err: serial Net: FEC [PRIME] Normal Boot Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc3(part 0) is current device CACHE: Misaligned operation at range [4ef69818, 4ef6a818] CACHE: Misaligned operation at range [4ef69818, 4ef6a818] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef69818 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a818 CACHE: Misaligned operation at range [4ef69818, 4ef6a818] CACHE: Misaligned operation at range [4ef69818, 4ef6a818] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef69818 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a818 Scanning mmc 3:1... CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] CACHE: Misaligned operation at range [4ef694f8, 4ef6a4f8] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef694f8 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a4f8 BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** libfdt fdt_check_header(): FDT_ERR_BADMAGIC Card did not respond to voltage select! : -110 Scanning disk mmc@2194000.blk... Disk mmc@2194000.blk not ready Card did not respond to voltage select! : -110 Scanning disk mmc@2198000.blk... Disk mmc@2198000.blk not ready Scanning disk mmc@219c000.blk... BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** Found 5 disks No EFI system partition BootOrder not defined EFI boot manager: Cannot load any image CACHE: Misaligned operation at range [4ef69550, 4ef6a550] CACHE: Misaligned operation at range [4ef69550, 4ef6a550] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef69550 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a550 CACHE: Misaligned operation at range [4ef69550, 4ef6a550] CACHE: Misaligned operation at range [4ef69550, 4ef6a550] ERROR: v7_outer_cache_inval_range - start address is not aligned - 0x4ef69550 ERROR: v7_outer_cache_inval_range - stop address is not aligned - 0x4ef6a550 BTRFS: superblock checksum mismatch No valid Btrfs found ** Unrecognized filesystem type ** MX6 CUSTOM U-Boot >

Re: Btrfs support imx6q based board

Sanket_Parekh — Fri, 11 Nov 2022 12:03:46 GMT

Hi @arulpandiyan_va ,

I hope you are doing well.

"CACHE: Misaligned operation at range [4ef694a0, 4ef6a4a0] " may occur if The superblock buffer is not cache-aligned.

In a later version of u-boot, this bug is resolved by using ALLOC_CACHE_ALIGN_BUFFER in btrfs_read_dev_super() function at /fs/btrfs/disk-io.c

you should update to the latest version of uboot or just apply the below-suggested change in the btrfs_read_dev_super() function:

-char tmp[BTRFS_SUPER_INFO_SIZE];
+ALLOC_CACHE_ALIGN_BUFFER(char, tmp, BTRFS_SUPER_INFO_SIZE);

If the issue still persists, please provide me with the Environment variable of uboot using printenv and the steps you have followed to create btrfs.

Thanks & Regards

Sanket Parekh

Re: Btrfs support imx6q based board

arulpandiyan_va — Wed, 16 Nov 2022 11:37:47 GMT

@Sanket_Parekh thanks for the quick reply and it resolves the issue around btrfs filesystem.

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