From: Martin Townsend <mtownsend1973@gmail.com>
To: Richard Weinberger <richard.weinberger@gmail.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: hung task detected in ubifs
Date: Thu, 20 Dec 2018 13:07:45 +0000 [thread overview]
Message-ID: <CABatt_yNxPpHMN98Jt1rcjHLHDSyz7XAjY=jdberVT3EiP=_Ag@mail.gmail.com> (raw)
In-Reply-To: <CAFLxGvzaZythh+u93Tq4Eqrdr7gN4v6sdoy3WP67qpBfpoxOmw@mail.gmail.com>
Hi Richard,
On Thu, Dec 20, 2018 at 10:54 AM Richard Weinberger
<richard.weinberger@gmail.com> wrote:
>
> On Thu, Dec 20, 2018 at 10:49 AM Martin Townsend
> <mtownsend1973@gmail.com> wrote:
> > 5 locks held by programmingapp/930:> #0: (&mm->mmap_sem){......}, at: [<80113ef0>] do_page_fault+0xb8/0x350
> > #1: (&le->mutex){......}, at: [<80568150>] ubi_eba_read_leb+0x34/0x438
> > #2: (of_dma_lock){......}, at: [<804ab890>]
> > of_dma_request_slave_channel+0x140/0x228
> > #3: (dma_list_mutex){......}, at: [<804a9d3c>] __dma_request_channel+0x24/0x8c
> > #4: (cma_mutex){......}, at: [<80246814>] cma_alloc+0xc8/0x29c
>
> The system seems to block in CMA, therefore make_reservation() does not make any
> progress and all write back blocks too.
> Do you have CONFIG_MIGRATION enabled?
>
> If possible, enable LOCKDEP, it can give us more details what is going on.
>
> --
> Thanks,
> //richard
I just checked and CONFIG_MIGRATION=y.
Interesting that it seems to block in the CMA, could it be that the
programmingapp process has used up all the CMA memory? I'll ask for a
complete log file.
I'll ask them to enable LOCKDEP and hope that the i.MX6 UL can handle it :)
Cheers, Martin.
next prev parent reply other threads:[~2018-12-20 13:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-20 9:49 hung task detected in ubifs Martin Townsend
2018-12-20 10:54 ` Richard Weinberger
2018-12-20 13:07 ` Martin Townsend [this message]
2018-12-20 13:15 ` Richard Weinberger
2018-12-20 14:19 ` Martin Townsend
2018-12-20 14:28 ` Richard Weinberger
2018-12-20 15:04 ` Martin Townsend
2018-12-20 15:42 ` Richard Weinberger
2018-12-20 17:03 ` Martin Townsend
2018-12-20 19:29 ` Richard Weinberger
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