BUG at fs/afs/rxrpc.c:177!

[Anton Blanchard]

Hi David,

> I don't suppose you have the line before this one, do you?  The following
> assertion:
> 
> 	ASSERTCMP(hard - call->acks_hard, <=, win);
> 
> prints both the values if it fails.

Unfortunately I don't. I tried reproducing (with the readlink patch applied)
and got this instead:


static void afs_free_call(struct afs_call *call)
...

        ASSERT(skb_queue_empty(&call->rx_queue));


kernel BUG at fs/afs/rxrpc.c:177!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=128 NUMA pSeries
Modules linked in: kafs fcrypt rxkad pcbc af_rxrpc fuse ib_ehca ib_core [last unloaded: kafs]
NIP: d00000000ceb74a8 LR: d00000000ceb74a4 CTR: 0000000000000001
REGS: c000000769232fd0 TRAP: 0700   Not tainted  (2.6.31-rc7-tip)
MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 24000084  XER: 20000010
TASK = c00000076bde8000[689] 'pdflush' THREAD: c000000769230000 CPU: 50
GPR00: d00000000ceb74a4 c000000769233250 d00000000cee4bd8 000000000000001c
GPR04: 0000000000000000 ffffffffffffffff 0000000000000000 0000000000000001
GPR08: c000000000b17468 c00000000097def0 c000000000b17970 0000000000000001
GPR12: 0000000024000082 c000000000b01880 d00000000cedccc0 6db6db6db6db6db7
GPR16: 00000000000056cf c0000007692333c0 1000000000000000 c000000000000000
GPR20: c000001ecbca8000 00000000000056ce c0000007692333e8 0000000000000000
GPR24: c000000769233400 0000000000000008 0000000000000000 c000000769233400
GPR28: c000001ecb644c00 c000001ecb644c00 d00000000cee2af8 c000000769233250
NIP [d00000000ceb74a8] .afs_free_call+0x140/0x1ac [kafs]
LR [d00000000ceb74a4] .afs_free_call+0x13c/0x1ac [kafs]
Call Trace:
[c000000769233250] [d00000000ceb74a4] .afs_free_call+0x13c/0x1ac [kafs] (unreliable)
[c0000007692332e0] [d00000000ceb8ac8] .afs_make_call+0x57c/0x608 [kafs]
[c000000769233490] [d00000000ceb17d0] .afs_fs_store_data+0x404/0x468 [kafs]
[c0000007692335a0] [d00000000cebf92c] .afs_vnode_store_data+0x170/0x2d0 [kafs]
[c000000769233690] [d00000000cec34f4] .afs_write_back_from_locked_page+0x350/0x4b8 [kafs]
[c0000007692337b0] [d00000000cec38a4] .afs_writepages_region+0x248/0x3b4 [kafs]
[c0000007692338a0] [d00000000cec3b48] .afs_writepages+0x138/0x264 [kafs]
[c000000769233960] [c0000000001286fc] .do_writepages+0x7c/0xbc
[c0000007692339f0] [c000000000197218] .writeback_single_inode+0x1f0/0x4a4
[c000000769233b10] [c000000000197b28] .generic_sync_sb_inodes+0x32c/0x5a4
[c000000769233bf0] [c000000000197f80] .writeback_inodes+0xf4/0x1a4
[c000000769233cb0] [c000000000128a0c] .wb_kupdate+0x130/0x1e4
[c000000769233db0] [c00000000012a174] .pdflush+0x214/0x380
[c000000769233ec0] [c0000000000a4098] .kthread+0xbc/0xc8
[c000000769233f90] [c00000000002fcd0] .kernel_thread+0x54/0x70

Anton