UBIFS assert failed in ubifs_set_page_dirty at 1421

[Jijiagang]

Dear Dave,
Thanks for your reply.
We removed some modules to keep kernel untainted. It still can be reproduced.

Here is the log:
UBIFS assert failed in ubifs_set_page_dirty at 1421 (pid 543)
CPU: 1 PID: 543 Comm: kswapd0 Not tainted 3.10.0_s40 #1
[<8001d8a0>] (unwind_backtrace+0x0/0x108) from [<80019f44>] (show_stack+0x20/0x24)
[<80019f44>] (show_stack+0x20/0x24) from [<80af2ef8>] (dump_stack+0x24/0x2c)
[<80af2ef8>] (dump_stack+0x24/0x2c) from [<80297234>] (ubifs_set_page_dirty+0x54/0x5c)
[<80297234>] (ubifs_set_page_dirty+0x54/0x5c) from [<800cea60>] (set_page_dirty+0x50/0x78)
[<800cea60>] (set_page_dirty+0x50/0x78) from [<800f4be4>] (try_to_unmap_one+0x1f8/0x3d0)
[<800f4be4>] (try_to_unmap_one+0x1f8/0x3d0) from [<800f4f44>] (try_to_unmap_file+0x9c/0x740)
[<800f4f44>] (try_to_unmap_file+0x9c/0x740) from [<800f5678>] (try_to_unmap+0x40/0x78)
[<800f5678>] (try_to_unmap+0x40/0x78) from [<800d6a04>] (shrink_page_list+0x23c/0x884)
[<800d6a04>] (shrink_page_list+0x23c/0x884) from [<800d76c8>] (shrink_inactive_list+0x21c/0x3c8)
[<800d76c8>] (shrink_inactive_list+0x21c/0x3c8) from [<800d7c20>] (shrink_lruvec+0x3ac/0x524)
[<800d7c20>] (shrink_lruvec+0x3ac/0x524) from [<800d8970>] (kswapd+0x854/0xdc0)
[<800d8970>] (kswapd+0x854/0xdc0) from [<80051e28>] (kthread+0xc8/0xcc)
[<80051e28>] (kthread+0xc8/0xcc) from [<80015198>] (ret_from_fork+0x14/0x20)
UBIFS assert failed in ubifs_writepage at 1009 (pid 6)
CPU: 0 PID: 6 Comm: kworker/u8:0 Not tainted 3.10.0_s40 #1
Workqueue: writeback bdi_writeback_workfn (flush-ubifs_1_0)
[<8001d8a0>] (unwind_backtrace+0x0/0x108) from [<80019f44>] (show_stack+0x20/0x24)
[<80019f44>] (show_stack+0x20/0x24) from [<80af2ef8>] (dump_stack+0x24/0x2c)
[<80af2ef8>] (dump_stack+0x24/0x2c) from [<80299294>] (ubifs_writepage+0x1d0/0x1dc)
[<80299294>] (ubifs_writepage+0x1d0/0x1dc) from [<800cefc0>] (__writepage+0x24/0x4c)
[<800cefc0>] (__writepage+0x24/0x4c) from [<800cf288>] (write_cache_pages+0x1b0/0x408)
[<800cf288>] (write_cache_pages+0x1b0/0x408) from [<800cf538>] (generic_writepages+0x58/0x70)
[<800cf538>] (generic_writepages+0x58/0x70) from [<800cf594>] (do_writepages+0x44/0x48)
[<800cf594>] (do_writepages+0x44/0x48) from [<80139a30>] (__writeback_single_inode+0x50/0x238)
[<80139a30>] (__writeback_single_inode+0x50/0x238) from [<8013ae48>] (writeback_sb_inodes+0x264/0x44c)
[<8013ae48>] (writeback_sb_inodes+0x264/0x44c) from [<8013b0c4>] (__writeback_inodes_wb+0x94/0xcc)
[<8013b0c4>] (__writeback_inodes_wb+0x94/0xcc) from [<8013b3dc>] (wb_writeback+0x228/0x2f8)
[<8013b3dc>] (wb_writeback+0x228/0x2f8) from [<8013b6b4>] (wb_do_writeback+0x208/0x24c)
[<8013b6b4>] (wb_do_writeback+0x208/0x24c) from [<8013b774>] (bdi_writeback_workfn+0x7c/0x1dc)
[<8013b774>] (bdi_writeback_workfn+0x7c/0x1dc) from [<8004ac64>] (process_one_work+0x160/0x460)
[<8004ac64>] (process_one_work+0x160/0x460) from [<8004b0ac>] (worker_thread+0x148/0x49c)
[<8004b0ac>] (worker_thread+0x148/0x49c) from [<80051e28>] (kthread+0xc8/0xcc)
[<80051e28>] (kthread+0xc8/0xcc) from [<80015198>] (ret_from_fork+0x14/0x20)
UBIFS assert failed in do_writepage at 936 (pid 6)
CPU: 3 PID: 6 Comm: kworker/u8:0 Not tainted 3.10.0_s40 #1
Workqueue: writeback bdi_writeback_workfn (flush-ubifs_1_0)
[<8001d8a0>] (unwind_backtrace+0x0/0x108) from [<80019f44>] (show_stack+0x20/0x24)
[<80019f44>] (show_stack+0x20/0x24) from [<80af2ef8>] (dump_stack+0x24/0x2c)
[<80af2ef8>] (dump_stack+0x24/0x2c) from [<802990b8>] (do_writepage+0x1b8/0x1c4)
[<802990b8>] (do_writepage+0x1b8/0x1c4) from [<802991e8>] (ubifs_writepage+0x124/0x1dc)
[<802991e8>] (ubifs_writepage+0x124/0x1dc) from [<800cefc0>] (__writepage+0x24/0x4c)
[<800cefc0>] (__writepage+0x24/0x4c) from [<800cf288>] (write_cache_pages+0x1b0/0x408)
[<800cf288>] (write_cache_pages+0x1b0/0x408) from [<800cf538>] (generic_writepages+0x58/0x70)
[<800cf538>] (generic_writepages+0x58/0x70) from [<800cf594>] (do_writepages+0x44/0x48)
[<800cf594>] (do_writepages+0x44/0x48) from [<80139a30>] (__writeback_single_inode+0x50/0x238)
[<80139a30>] (__writeback_single_inode+0x50/0x238) from [<8013ae48>] (writeback_sb_inodes+0x264/0x44c)
[<8013ae48>] (writeback_sb_inodes+0x264/0x44c) from [<8013b0c4>] (__writeback_inodes_wb+0x94/0xcc)
[<8013b0c4>] (__writeback_inodes_wb+0x94/0xcc) from [<8013b3dc>] (wb_writeback+0x228/0x2f8)
[<8013b3dc>] (wb_writeback+0x228/0x2f8) from [<8013b6b4>] (wb_do_writeback+0x208/0x24c)
[<8013b6b4>] (wb_do_writeback+0x208/0x24c) from [<8013b774>] (bdi_writeback_workfn+0x7c/0x1dc)
[<8013b774>] (bdi_writeback_workfn+0x7c/0x1dc) from [<8004ac64>] (process_one_work+0x160/0x460)
[<8004ac64>] (process_one_work+0x160/0x460) from [<8004b0ac>] (worker_thread+0x148/0x49c)
[<8004b0ac>] (worker_thread+0x148/0x49c) from [<80051e28>] (kthread+0xc8/0xcc)
[<80051e28>] (kthread+0xc8/0xcc) from [<80015198>] (ret_from_fork+0x14/0x20)
UBIFS assert failed in ubifs_release_budget at 567 (pid 6)
CPU: 3 PID: 6 Comm: kworker/u8:0 Not tainted 3.10.0_s40 #1
Workqueue: writeback bdi_writeback_workfn (flush-ubifs_1_0)

-----Original Message-----
From: Dave Chinner [mailto:david at fromorbit.com] 
Sent: Tuesday, October 21, 2014 11:39 AM
To: Artem Bityutskiy
Cc: Caizhiyong; linux-fsdevel at vger.kernel.org; linux-mm at kvack.org; Jijiagang; adrian.hunter at intel.com; linux-mtd at lists.infradead.org; Wanli (welly)
Subject: Re: UBIFS assert failed in ubifs_set_page_dirty at 1421

On Mon, Oct 20, 2014 at 04:11:59PM +0300, Artem Bityutskiy wrote:
> 3. There are exactly 2 places where UBIFS-backed pages may be marked 
> as
> dirty:
> 
>   a) ubifs_write_end() [->wirte_end] - the file write path
>   b) ubifs_page_mkwrite() [->page_mkwirte] - the file mmap() path
> 
> 4. If anything calls 'ubifs_set_page_dirty()' directly (not through 
> write_end()/mkwrite()), and the page was not dirty, UBIFS will 
> complain with the assertion that you see.
> 
> > CPU: 3 PID: 543 Comm: kswapd0 Tainted: P           O 3.10.0_s40 #1

Kernel is tainted. Not worth wasting time on unless it can be reproduced on an untainted kernel...

Cheers,

Dave.
--
Dave Chinner
david at fromorbit.com