ubifs: assertion fails

[Dolev Raviv]

Hi,
I still see this. I was blocked recently by other tasks. I guess I'll get to
it in the near future.
If you have an insight on this it will be very helpful.

Thanks,
Dolev
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-----Original Message-----
From: hujianyang [mailto:hujianyang at huawei.com] 
Sent: Thursday, May 29, 2014 4:56 AM
To: Dolev Raviv; Artem Bityutskiy
Cc: linux-mtd
Subject: Re: ubifs: assertion fails

Hi Dolev and Artem,

I hit the same assert failed in Kernel v3.10 shows like this:

[ 9641.164028] UBIFS assert failed in shrink_tnc at 131 (pid 13297)
[ 9641.234078] CPU: 1 PID: 13297 Comm: mmap.test Tainted: G           O
3.10.40 #1
[ 9641.234116] [<c0011a6c>] (unwind_backtrace+0x0/0x12c) from [<c000d0b0>]
(show_stack+0x20/0x24) [ 9641.234137] [<c000d0b0>] (show_stack+0x20/0x24)
from [<c0311134>] (dump_stack+0x20/0x28) [ 9641.234188] [<c0311134>]
(dump_stack+0x20/0x28) from [<bf22425c>] (shrink_tnc_trees+0x25c/0x350
[ubifs]) [ 9641.234265] [<bf22425c>] (shrink_tnc_trees+0x25c/0x350 [ubifs])
from [<bf2245ac>] (ubifs_shrinker+0x25c/0x310 [ubifs]) [ 9641.234307]
[<bf2245ac>] (ubifs_shrinker+0x25c/0x310 [ubifs]) from [<c00cdad8>]
(shrink_slab+0x1d4/0x2f8) [ 9641.234327] [<c00cdad8>]
(shrink_slab+0x1d4/0x2f8) from [<c00d03d0>]
(do_try_to_free_pages+0x300/0x544)
[ 9641.234344] [<c00d03d0>] (do_try_to_free_pages+0x300/0x544) from
[<c00d0a44>] (try_to_free_pages+0x2d0/0x398) [ 9641.234363] [<c00d0a44>]
(try_to_free_pages+0x2d0/0x398) from [<c00c6a60>]
(__alloc_pages_nodemask+0x494/0x7e8)
[ 9641.234382] [<c00c6a60>] (__alloc_pages_nodemask+0x494/0x7e8) from
[<c00f62d8>] (new_slab+0x78/0x238) [ 9641.234400] [<c00f62d8>]
(new_slab+0x78/0x238) from [<c031081c>]
(__slab_alloc.constprop.42+0x1a4/0x50c)
[ 9641.234419] [<c031081c>] (__slab_alloc.constprop.42+0x1a4/0x50c) from
[<c00f80e8>] (kmem_cache_alloc_trace+0x54/0x188)
[ 9641.234459] [<c00f80e8>] (kmem_cache_alloc_trace+0x54/0x188) from
[<bf227908>] (do_readpage+0x168/0x468 [ubifs]) [ 9641.234553] [<bf227908>]
(do_readpage+0x168/0x468 [ubifs]) from [<bf2296a0>]
(ubifs_readpage+0x424/0x464 [ubifs]) [ 9641.234606] [<bf2296a0>]
(ubifs_readpage+0x424/0x464 [ubifs]) from [<c00c17c0>]
(filemap_fault+0x304/0x418) [ 9641.234638] [<c00c17c0>]
(filemap_fault+0x304/0x418) from [<c00de694>] (__do_fault+0xd4/0x530) [
9641.234665] [<c00de694>] (__do_fault+0xd4/0x530) from [<c00e10c0>]
(handle_pte_fault+0x480/0xf54) [ 9641.234690] [<c00e10c0>]
(handle_pte_fault+0x480/0xf54) from [<c00e2bf8>]
(handle_mm_fault+0x140/0x184) [ 9641.234716] [<c00e2bf8>]
(handle_mm_fault+0x140/0x184) from [<c0316688>] (do_page_fault+0x150/0x3ac)
[ 9641.234737] [<c0316688>] (do_page_fault+0x150/0x3ac) from [<c000842c>]
(do_DataAbort+0x3c/0xa0) [ 9641.234759] [<c000842c>]
(do_DataAbort+0x3c/0xa0) from [<c0314e38>] (__dabt_usr+0x38/0x40)

Did you fix it in recent patches? If not, I will take some times on it.

I hit this when I was doing stress test, only once and no other failed
messages. I haven't do umount or rmmod until now so I don't know further
information about it.

Thanks!


Hu