This thread seems to indicate that a physical problem within the eMMC is 
quite unlikely and that badblocks should've been marked automatically: 
https://groups.google.com/forum/embed/?place=forum/beagleboard&showsearch=true&showpopout=true&showtabs=true&hideforumtitle=true&parenturl=http%3A%2F%2Fbeagleboard.org%2FCommunity%2FForums#!searchin/beagleboard/emmc/beagleboard/6dJHbqgE7-c/uTSkbqCCJgAJ

Should I format/reinstall?

Thanks.

On Wednesday, October 14, 2015 at 12:51:37 PM UTC-4, Michel Lavoie wrote:

> 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)
> ...

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