Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U9

[Ingo Molnar]

* Gunther Persoons <gunther_persoons@xxxxxxxxxx> 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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