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SubjectRe: sleeping function called from invalid context include/linux/rwsem.h:43
On Wed, Aug 20, 2003 at 01:38:09AM -0500, Hmamouche, Youssef wrote:
>
> Hi,
>
> I get this debug message right before the oops(Oops linux-2.6.0-test3
> sound) that I sent earlier to the list. When this Debug message happens
> before the oops, the system freezes. All of this is related to the
> Maestro3.c sound card. I've ran 2.4{16, 20, 21, 22-pre8} without a
> problem. I searched through the list archive for a similar problem, in
> vain. Can someone please tell what's causing this?

Could you post the oops together with the might_sleep trace? This is
something calling down_read in a context where its not safe to sleep.
The rest of the backtrace doesn't make much sense..

Did you build with preempt enabled?

>
> Thanks
>
> Debug: sleeping function called from invalid context at
> include/linux/rwsem.h:43
> Aug 19 23:59:34 darkstar kernel: Debug: sleeping function called from
> invalid context at include/linux/rwsem.h:43
>
> Call Trace:
> [<c012722e>] __might_sleep+0x5e/0x70
> [<c0127b20>] autoremove_wake_function+0x0/0x50
> [<c0122869>] do_page_fault+0x79/0x4dc
> [<c01c71ad>] ext2_get_inode+0xdd/0x140
> [<c022973c>] avc_has_perm+0x6c/0x7b
> [<c01227f0>] do_page_fault+0x0/0x4dc
> [<c010b1b9>] error_code+0x2d/0x38
> [<c03dabe1>] m3_open+0x131/0x390
> [<c0159b94>] check_poison_obj+0x54/0x1d0
> [<c03d4d25>] soundcore_open+0x1e5/0x4e0
> [<c0186c90>] exact_match+0x0/0x10
> [<c0186696>] chrdev_open+0x156/0x3e0
> [<c017a388>] get_empty_filp+0x98/0x100
> [<c017823c>] dentry_open+0x12c/0x1c0
> [<c0178106>] filp_open+0x66/0x70
> [<c0178855>] sys_open+0x55/0x90
> [<c010b00f>] syscall_call+0x7/0xb
>
>
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