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SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U9
Ingo Molnar wrote:

>* Gunther Persoons <> wrote:
>>The kernel booted now with my firewire card plugged in. However when i
>>try to mount my reiser4 partition i get following error
>>BUG: semaphore recursion deadlock detected!
>>.. current task mount/10514 is already holding ccb5bb4c.
>>[<c0344760>] down_write+0x103/0x1a6 (48)
>>[<d0b26a08>] kcond_wait+0xaa/0xac [reiser4] (36)
>>[<d0b280b0>] start_ktxnmgrd+0x98/0x9a [reiser4] (36)
>>[<d0b33716>] reiser4_fill_super+0x3b/0x71 [reiser4] (28)
>>[<d0b2d569>] reiser4_get_sb+0x2f/0x33 [reiser4] (68)
>>[<c016061a>] do_kern_mount+0x4f/0xc0 (4)
>>[<c0175945>] do_new_mount+0x9c/0xe1 (36)
>>[<c0175feb>] do_mount+0x145/0x194 (44)
>>[<c0176459>] sys_mount+0x9f/0xe0 (32)
>>[<c01060b1>] sysenter_past_esp+0x52/0x71 (44)
>reiser4 has some pretty ugly locking abstraction called kcond, i took a
>look but it doesnt seem simple to convert it. Reiserfs should really use
>a normal Linux waitqueue and nothing more...
> Ingo
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Got a second error, while compiling a new kernel my network connection
got down

BUG: semaphore recursion deadlock detected!
.. current task eth0/10202 is already holding cc9345ac.
cc9345ac c03433b7 cfe51260 ccb5e000 cc9345ac cd11c740 ccb5ff8c ffffe000
c034490c cc9345ac 000001d9 cc9345b0 cc9345b0 cd11c740 00000002
ccb5e000 cc934644 ffffe000 d0a7a136 c5fcd280 cc934000 ccb5e000
Call Trace:
[<c03433b7>] __sched_text_start+0x2e3/0x5e2 (8)
[<c034490c>] down_write_interruptible+0x109/0x243 (28)
[<d0a7a136>] airo_thread+0x82/0x2a0 [airo] (44)
[<c0105fda>] ret_from_fork+0x6/0x14 (16)
[<c011d046>] default_wake_function+0x0/0x12 (12)
[<d0a7a0b4>] airo_thread+0x0/0x2a0 [airo] (24)
[<c01042a9>] kernel_thread_helper+0x5/0xb (16)
preempt count: 00000003
. 3-level deep critical section nesting:
.. entry 1: down_write_interruptible+0x23e/0x243 / (0x0)
.. entry 2: down_write_interruptible+0x6c/0x243 / (0x0)
.. entry 3: print_traces+0x17/0x50 / (0x0)

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