Re: BUG: sleeping function called from invalid context at kernel/rtmutex.c:684..... target: PowerPC

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From: gowrishankar <gowrishankar.m@linux.vnet.ibm.com>
To: Adeel Arshad <adeel_arshad@mentor.com>
Cc: linux-rt-users@vger.kernel.org
Subject: Re: BUG: sleeping function called from invalid context at kernel/rtmutex.c:684..... target: PowerPC
Date: Mon, 18 Oct 2010 23:55:14 +0530	[thread overview]
Message-ID: <4CBC910A.6090403@linux.vnet.ibm.com> (raw)
In-Reply-To: <1287409551.11482.5.camel@pkl-zanwar-01.pkl.mentorg.com>

On Monday 18 October 2010 07:15 PM, Adeel Arshad wrote:
> Hi,
>
> I am testing/evaluating PREEMPT_RT patch on a Freescale's board with
> following details,
>
> target system : mpc8572ds (powerpc)
> kernel version : 2.6.31 now 2.6.31-rt21
>
>    

Is it reproducible in 2.6.33.7-rt29 which is the latest as of now.

Thanks for the testing,
Gowrishankar
> after patching the kernel when I enable Full Preemption mode I receive
> following messages in the log (dmesg). Although I am not facing any
> hang/crash issue yet due to/in effect of these messages but I am looking
> to fix these. On investigating I found that this issue occurs when an
> rt_spin_lock is acquired while the interrupt/preemption is disabled.
> Also analyzing the patch in detail I found that many spin_lock are
> replaced with atomic_spin_lock. Should I replace the remaining ones..?
> or please guide me how to fix this issue...
>
>
>   at kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2369, name: smbd
> Call Trace:
> [eeb21e60] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb21e90] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb21ea0] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb21eb0] [c00dde70] mprotect_fixup+0x1b4/0x3e4
> [eeb21f10] [c00de208] sys_mprotect+0x168/0x1e4
> [eeb21f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2370, name: smbd
> Call Trace:
> [ef2b1df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ef2b1e20] [c0040af8] __might_sleep+0xf0/0xf4
> [ef2b1e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ef2b1e40] [c00d4ef0] __do_fault+0x154/0x508
> [ef2b1e90] [c0017174] do_page_fault+0x214/0x4b0
> [ef2b1f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: scheduling while atomic: rc/0x00000001/2373, CPU#0
> Modules linked in: t23xrm
> Call Trace:
> [ee9079b0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee9079e0] [c00470a8] __schedule_bug+0xac/0xb0
> [ee907a00] [c045c638] __schedule+0x448/0x89c
> [ee907a70] [c045cd6c] schedule+0x20/0x44
> [ee907a80] [c045e1f4] rt_spin_lock_slowlock+0x2cc/0x334
> [ee907b00] [c00bef28] get_zone_pcp+0x70/0xd4
> [ee907b30] [c00c0a40] free_hot_cold_page+0x134/0x3d4
> [ee907b70] [c00c5ca0] put_page+0x60/0x198
> [ee907b90] [c00e40e0] free_page_and_swap_cache+0x38/0x7c
> [ee907ba0] [c00d642c] unmap_vmas+0x48c/0x690
> [ee907c30] [c00db86c] exit_mmap+0x108/0x21c
> [ee907c90] [c004d674] mmput+0x74/0x12c
> [ee907cb0] [c00f8b2c] flush_old_exec+0x3a0/0x658
> [ee907cf0] [c013cd6c] load_elf_binary+0x468/0x1394
> [ee907d70] [c00f80c8] search_binary_handler+0x214/0x43c
> [ee907dd0] [c013aed0] load_script+0x270/0x284
> [ee907e80] [c00f80c8] search_binary_handler+0x214/0x43c
> [ee907ee0] [c00f98bc] do_execve+0x30c/0x35c
> [ee907f20] [c00097bc] sys_execve+0x68/0xa4
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> LDA version 0.9.6 (aarshad@pkl-zanwar-01.pkl.mentorg.com) NR_CPUS=2 Wed
> Oct 6 08:22:39 UTC 2010
> BUG: using smp_processor_id() in preemptible [00000000] code:
> modprobe/2380
> caller is init_lda+0x60/0x2b0 [lda]
> Call Trace:
> [ee919e80] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee919eb0] [c025458c] debug_smp_processor_id+0xf8/0xfc
> [ee919ed0] [f917b060] init_lda+0x60/0x2b0 [lda]
> [ee919ef0] [c0001d78] do_one_initcall+0x54/0x218
> [ee919f20] [c008fb70] sys_init_module+0x120/0x230
> [ee919f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2334, name: named
> Call Trace:
> [eeb19df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb19e20] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb19e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb19e40] [c00d4ef0] __do_fault+0x154/0x508
> [eeb19e90] [c0017174] do_page_fault+0x214/0x4b0
> [eeb19f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2365, name: ntpd
> Call Trace:
> [ee99bdf0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee99be20] [c0040af8] __might_sleep+0xf0/0xf4
> [ee99be30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee99be40] [c00d4ef0] __do_fault+0x154/0x508
> [ee99be90] [c0017174] do_page_fault+0x214/0x4b0
> [ee99bf40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2365, name: ntpd
> Call Trace:
> [ee99bdf0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee99be20] [c0040af8] __might_sleep+0xf0/0xf4
> [ee99be30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee99be40] [c00d4ef0] __do_fault+0x154/0x508
> [ee99be90] [c0017174] do_page_fault+0x214/0x4b0
> [ee99bf40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907e20] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907e40] [c00d4ef0] __do_fault+0x154/0x508
> [ee907e90] [c0017174] do_page_fault+0x214/0x4b0
> [ee907f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907b20] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907b50] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907b60] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907b70] [c00d7634] handle_mm_fault+0x564/0x81c
> [ee907bd0] [c0017174] do_page_fault+0x214/0x4b0
> [ee907c80] [c0012f10] handle_page_fault+0xc/0x80
> [ee907d40] [c00b9128] file_read_actor+0x27c/0x2d0
> [ee907d70] [c00bbf38] generic_file_aio_read+0x364/0x79c
> [ee907e00] [c0198804] nfs_file_read+0x1a0/0x21c
> [ee907e30] [c00f12fc] do_sync_read+0xd0/0x15c
> [ee907ef0] [c00f238c] vfs_read+0xcc/0x19c
> [ee907f10] [c00f2594] sys_read+0x58/0xc8
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907b20] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907b50] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907b60] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907b70] [c00d7634] handle_mm_fault+0x564/0x81c
> [ee907bd0] [c0017174] do_page_fault+0x214/0x4b0
> [ee907c80] [c0012f10] handle_page_fault+0xc/0x80
> [ee907d40] [c00b9128] file_read_actor+0x27c/0x2d0
> [ee907d70] [c00bbf38] generic_file_aio_read+0x364/0x79c
> [ee907e00] [c0198804] nfs_file_read+0x1a0/0x21c
> [ee907e30] [c00f12fc] do_sync_read+0xd0/0x15c
> [ee907ef0] [c00f238c] vfs_read+0xcc/0x19c
> [ee907f10] [c00f2594] sys_read+0x58/0xc8
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907de0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907e10] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907e20] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907e30] [c00d7634] handle_mm_fault+0x564/0x81c
> [ee907e90] [c0017174] do_page_fault+0x214/0x4b0
> [ee907f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907b20] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907b50] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907b60] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907b70] [c00d7634] handle_mm_fault+0x564/0x81c
> [ee907bd0] [c0017174] do_page_fault+0x214/0x4b0
> [ee907c80] [c0012f10] handle_page_fault+0xc/0x80
> [ee907d40] [c00b9128] file_read_actor+0x27c/0x2d0
> [ee907d70] [c00bbf38] generic_file_aio_read+0x364/0x79c
> [ee907e00] [c0198804] nfs_file_read+0x1a0/0x21c
> [ee907e30] [c00f12fc] do_sync_read+0xd0/0x15c
> [ee907ef0] [c00f238c] vfs_read+0xcc/0x19c
> [ee907f10] [c00f2594] sys_read+0x58/0xc8
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907b20] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907b50] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907b60] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907b70] [c00d7634] handle_mm_fault+0x564/0x81c
> [ee907bd0] [c0017174] do_page_fault+0x214/0x4b0
> [ee907c80] [c0012f10] handle_page_fault+0xc/0x80
> [ee907d40] [c00b9128] file_read_actor+0x27c/0x2d0
> [ee907d70] [c00bbf38] generic_file_aio_read+0x364/0x79c
> [ee907e00] [c0198804] nfs_file_read+0x1a0/0x21c
> [ee907e30] [c00f12fc] do_sync_read+0xd0/0x15c
> [ee907ef0] [c00f238c] vfs_read+0xcc/0x19c
> [ee907f10] [c00f2594] sys_read+0x58/0xc8
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2372, name: nmbd
> Call Trace:
> [eeb21df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb21e20] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb21e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb21e40] [c00d4ef0] __do_fault+0x154/0x508
> [eeb21e90] [c0017174] do_page_fault+0x214/0x4b0
> [eeb21f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2365, name: ntpd
> Call Trace:
> [ee99bdf0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee99be20] [c0040af8] __might_sleep+0xf0/0xf4
> [ee99be30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee99be40] [c00d4ef0] __do_fault+0x154/0x508
> [ee99be90] [c0017174] do_page_fault+0x214/0x4b0
> [ee99bf40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2372, name: nmbd
> Call Trace:
> [eeb21df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb21e20] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb21e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb21e40] [c00d4ef0] __do_fault+0x154/0x508
> [eeb21e90] [c0017174] do_page_fault+0x214/0x4b0
> [eeb21f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2391, name: getty
> Call Trace:
> [eea31de0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eea31e10] [c0040af8] __might_sleep+0xf0/0xf4
> [eea31e20] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eea31e30] [c00d7634] handle_mm_fault+0x564/0x81c
> [eea31e90] [c0017174] do_page_fault+0x214/0x4b0
> [eea31f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2391, name: sh
> Call Trace:
> [eea31d50] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eea31d80] [c0040af8] __might_sleep+0xf0/0xf4
> [eea31d90] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eea31da0] [c00d8bc4] copy_page_range+0x160/0x4dc
> [eea31e20] [c004dcec] dup_mm+0x2b4/0x3e4
> [eea31e60] [c004ea1c] copy_process+0xbb4/0xfac
> [eea31ec0] [c004eeac] do_fork+0x98/0x3d4
> [eea31f20] [c0008cb8] sys_clone+0x68/0xac
> [eea31f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2391, name: sh
> Call Trace:
> [eea31b20] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eea31b50] [c0040af8] __might_sleep+0xf0/0xf4
> [eea31b60] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eea31b70] [c00d7634] handle_mm_fault+0x564/0x81c
> [eea31bd0] [c0017174] do_page_fault+0x214/0x4b0
> [eea31c80] [c0012f10] handle_page_fault+0xc/0x80
> [eea31d40] [c00b9128] file_read_actor+0x27c/0x2d0
> [eea31d70] [c00bbf38] generic_file_aio_read+0x364/0x79c
> [eea31e00] [c0198804] nfs_file_read+0x1a0/0x21c
> [eea31e30] [c00f12fc] do_sync_read+0xd0/0x15c
> [eea31ef0] [c00f238c] vfs_read+0xcc/0x19c
> [eea31f10] [c00f2594] sys_read+0x58/0xc8
> [eea31f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2365, name: ntpd
> Call Trace:
> [ee99bdf0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee99be20] [c0040af8] __might_sleep+0xf0/0xf4
> [ee99be30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee99be40] [c00d4ef0] __do_fault+0x154/0x508
> [ee99be90] [c0017174] do_page_fault+0x214/0x4b0
> [ee99bf40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2334, name: named
> Call Trace:
> [eeb19df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb19e20] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb19e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb19e40] [c00d4ef0] __do_fault+0x154/0x508
> [eeb19e90] [c0017174] do_page_fault+0x214/0x4b0
> [eeb19f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907da0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907dd0] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907de0] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907df0] [c00d6190] unmap_vmas+0x1f0/0x690
> [ee907e80] [c00db574] unmap_region+0xf0/0x214
> [ee907ef0] [c00dca78] do_munmap+0x2b8/0x33c
> [ee907f20] [c00dcb44] sys_munmap+0x48/0x78
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907da0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907dd0] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907de0] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907df0] [c00d6190] unmap_vmas+0x1f0/0x690
> [ee907e80] [c00db574] unmap_region+0xf0/0x214
> [ee907ef0] [c00dca78] do_munmap+0x2b8/0x33c
> [ee907f20] [c00dcb44] sys_munmap+0x48/0x78
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2372, name: nmbd
> Call Trace:
> [eeb21df0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb21e20] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb21e30] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb21e40] [c00d4ef0] __do_fault+0x154/0x508
> [eeb21e90] [c0017174] do_page_fault+0x214/0x4b0
> [eeb21f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2386, name: freshclam
> Call Trace:
> [ee907da0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [ee907dd0] [c0040af8] __might_sleep+0xf0/0xf4
> [ee907de0] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [ee907df0] [c00d6190] unmap_vmas+0x1f0/0x690
> [ee907e80] [c00db574] unmap_region+0xf0/0x214
> [ee907ef0] [c00dca78] do_munmap+0x2b8/0x33c
> [ee907f20] [c00dcb44] sys_munmap+0x48/0x78
> [ee907f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2372, name: nmbd
> Call Trace:
> [eeb21de0] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eeb21e10] [c0040af8] __might_sleep+0xf0/0xf4
> [eeb21e20] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eeb21e30] [c00d750c] handle_mm_fault+0x43c/0x81c
> [eeb21e90] [c0017174] do_page_fault+0x214/0x4b0
> [eeb21f40] [c0012f10] handle_page_fault+0xc/0x80
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2391, name: sh
> Call Trace:
> [eea31b20] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eea31b50] [c0040af8] __might_sleep+0xf0/0xf4
> [eea31b60] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eea31b70] [c00d7634] handle_mm_fault+0x564/0x81c
> [eea31bd0] [c0017174] do_page_fault+0x214/0x4b0
> [eea31c80] [c0012f10] handle_page_fault+0xc/0x80
> [eea31d40] [c00b9128] file_read_actor+0x27c/0x2d0
> [eea31d70] [c00bbf38] generic_file_aio_read+0x364/0x79c
> [eea31e00] [c0198804] nfs_file_read+0x1a0/0x21c
> [eea31e30] [c00f12fc] do_sync_read+0xd0/0x15c
> [eea31ef0] [c00f238c] vfs_read+0xcc/0x19c
> [eea31f10] [c00f2594] sys_read+0x58/0xc8
> [eea31f40] [c0012ad0] ret_from_syscall+0x0/0x3c
> BUG: sleeping function called from invalid context at
> kernel/rtmutex.c:684
> in_atomic(): 1, irqs_disabled(): 0, pid: 2391, name: sh
> Call Trace:
> [eea31d50] [c0008840] show_stack+0x70/0x1b4 (unreliable)
> [eea31d80] [c0040af8] __might_sleep+0xf0/0xf4
> [eea31d90] [c045ed0c] rt_spin_lock+0xa4/0xa8
> [eea31da0] [c00d8bc4] copy_page_range+0x160/0x4dc
> [eea31e20] [c004dcec] dup_mm+0x2b4/0x3e4
> [eea31e60] [c004ea1c] copy_process+0xbb4/0xfac
> [eea31ec0] [c004eeac] do_fork+0x98/0x3d4
> [eea31f20] [c0008cb8] sys_clone+0x68/0xac
> [eea31f40] [c0012ad0] ret_from_syscall+0x0/0x3c
>
>
> --
> Regards:
>
> Adeel Arshad
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>

next prev parent reply	other threads:[~2010-10-18 18:25 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-18 13:45 BUG: sleeping function called from invalid context at kernel/rtmutex.c:684..... target: PowerPC Adeel Arshad
2010-10-18 18:25 ` gowrishankar [this message]
2010-10-19  7:08   ` Adeel Arshad

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