Hi,
One of my BBB has been having problems with its filesystem for a while now and I think it originates from a physical problem on the eMMC but badblocks didn’t find any error. It’s running on Linux kernel 4.2.0-1-ARCH (Arch Linux) which is installed on the eMMC (no µSD card).
The behavior is that after a while (generally a few days) the journal fails and the FS is remounted as read-only. The latest event’s dmesg output is shown below. I starts with a “mmcqd/1: page allocation failure: order:3, mode:0xc020”, follows with an aborted journal and the FS being remounted RO.
I ran fsck.ext4 manually with the system unmounted (booted with a µSD card) and fixed several errors each time. As this event kept appearing afterwards I concluded that the must be something wrong with the eMMC. I then backed-up the partition (dd) and ran fsck with non-destructive badblocks (https://wiki.archlinux.org/index.php/Badblocks#read-write_Test_.28non-destructive.29)) but no error was found apart from filesystem issues which fsck fixed (no bad sector).
Am I right in assuming that this is most likely a physical problem with the eMMC? Is there a more appropriate test I should run to test the eMMC?
Thanks,
[274268.642991] mmcqd/1: page allocation failure: order:3, mode:0xc020 [274268.649397] CPU: 0 PID: 92 Comm: mmcqd/1 Not tainted 4.2.0-1-ARCH #1 [274268.655895] Hardware name: Generic AM33XX (Flattened Device Tree) [274268.662150] [<c001704c>] (unwind_backtrace) from [<c0014224>] (show_stack+0x20/0x24) [274268.670047] [<c0014224>] (show_stack) from [<c08b4f58>] (dump_stack+0x24/0x28) [274268.677415] [<c08b4f58>] (dump_stack) from [<c01221f8>] (warn_alloc_failed+0xec/0x128) [274268.685478] [<c01221f8>] (warn_alloc_failed) from [<c0125304>] (__alloc_pages_nodemask+0x778/0x8f4) [274268.694667] [<c0125304>] (__alloc_pages_nodemask) from [<c01256c4>] (alloc_kmem_pages+0x40/0x110) [274268.703667] [<c01256c4>] (alloc_kmem_pages) from [<c013e4e0>] (kmalloc_order+0x20/0x38) [274268.711809] [<c013e4e0>] (kmalloc_order) from [<c013e524>] (kmalloc_order_trace+0x2c/0x94) [274268.720215] [<c013e524>] (kmalloc_order_trace) from [<c016454c>] (__kmalloc+0x1e8/0x24c) [274268.728450] [<c016454c>] (__kmalloc) from [<c04febf0>] (edma_prep_slave_sg+0xa4/0x2fc) [274268.736515] [<c04febf0>] (edma_prep_slave_sg) from [<c0717258>] (omap_hsmmc_request+0x430/0x528) [274268.745448] [<c0717258>] (omap_hsmmc_request) from [<c06f9f4c>] (__mmc_start_request+0x3c/0x58) [274268.754288] [<c06f9f4c>] (__mmc_start_request) from [<c06fa0c8>] (mmc_start_request+0x160/0x298) [274268.763201] [<c06fa0c8>] (mmc_start_request) from [<c06fae3c>] (mmc_start_req+0x2a4/0x3d8) [274268.771611] [<c06fae3c>] (mmc_start_req) from [<c070b568>] (mmc_blk_issue_rw_rq+0xb8/0xaac) [274268.780100] [<c070b568>] (mmc_blk_issue_rw_rq) from [<c070c1b8>] (mmc_blk_issue_rq+0x25c/0x4ec) [274268.788943] [<c070c1b8>] (mmc_blk_issue_rq) from [<c070cbf0>] (mmc_queue_thread+0xa8/0x170) [274268.797470] [<c070cbf0>] (mmc_queue_thread) from [<c00659b8>] (kthread+0xe4/0xfc) [274268.805097] [<c00659b8>] (kthread) from [<c0010588>] (ret_from_fork+0x14/0x2c) [274268.812435] Mem-Info: [274268.814827] active_anon:4121 inactive_anon:22 isolated_anon:0 active_file:34640 inactive_file:71649 isolated_file:0 unevictable:4153 dirty:31 writeback:0 unstable:0 slab_reclaimable:5820 slab_unreclaimable:1640 mapped:7397 shmem:146 pagetables:234 bounce:0 free:1223 free_pcp:176 free_cma:1 [274268.848553] Normal free:4892kB min:2836kB low:3544kB high:4252kB active_anon:16484kB inactive_anon:88kB active_file:138560kB inactive_file:286596kB unevictable:16612kB isolated(anon):0kB isolated(file):0kB present:524288kB managed:504308kB mlocked:16612kB dirty:124kB writeback:0kB mapped:29588kB shmem:584kB slab_reclaimable:23280kB slab_unreclaimable:6560kB kernel_stack:712kB pagetables:936kB unstable:0kB bounce:0kB free_pcp:704kB local_pcp:704kB free_cma:4kB writeback_tmp:0kB pages_scanned:68 all_unreclaimable? no [274268.894477] lowmem_reserve[]: 0 0 0 [274268.898089] Normal: 813*4kB (UEMC) 203*8kB (UM) 1*16kB (M) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB = 4892kB [274268.911028] 108200 total pagecache pages [274268.915069] 0 pages in swap cache [274268.918482] Swap cache stats: add 0, delete 0, find 0/0 [274268.923810] Free swap = 0kB [274268.926796] Total swap = 0kB [274268.929771] 131072 pages RAM [274268.932744] 0 pages HighMem/MovableOnly [274268.936691] 4294966147 pages reserved [274268.940451] 6144 pages cma reserved [274268.944061] edma-dma-engine edma-dma-engine.0: edma_prep_slave_sg: Failed to allocate a descriptor [274268.953147] omap_hsmmc 481d8000.mmc: prep_slave_sg() failed [274268.958842] omap_hsmmc 481d8000.mmc: MMC start dma failure [274268.968506] mmcblk0: unknown error -1 sending read/write command, card status 0x900 [274268.976451] blk_update_request: I/O error, dev mmcblk0, sector 1630840 [...] [274269.037533] blk_update_request: I/O error, dev mmcblk0, sector 1630912 [274269.072885] Aborting journal on device mmcblk0p1-8. [274269.085261] EXT4-fs error (device mmcblk0p1): ext4_journal_check_start:56: Detected aborted journal [274269.094508] EXT4-fs (mmcblk0p1): Remounting filesystem read-only [274269.101813] EXT4-fs error (device mmcblk0p1): ext4_journal_check_start:56: Detected aborted journal [274269.113530] systemd-journald[138]: Failed to create new system journal: Read-only file system [274269.133427] systemd-journald[138]: Failed to rotate /var/log/journal/8a327183d5764238aefe1f3086448cb9/user-1000.journal: Read-only file system [360758.287562] EXT4-fs (mmcblk0p1): error count since last fsck: 3 [360758.293621] EXT4-fs (mmcblk0p1): initial error at time 1444708807: ext4_journal_check_start:56 [360758.302360] EXT4-fs (mmcblk0p1): last error at time 1444708807: ext4_journal_check_start:56