Re: [microblaze-uclinux] BUG: scheduling while atomic: (Kernel 2.6)

[Jim Van Vorst <jvanvorst@xxxxxxxxx>]

John,

I applied this patch and the syscall patch and it seems to fix my problem.
I still get the "sleep function" messages but they appear to be 
non-fatal since
the system keeps running.  I turned that checking off for now.
Works with PREEMPT on and off.

Thanks!
jim

John Williams wrote:
> Hi Jim,
>
> Thanks for the info.
>
> Can you please try the attached patch? Seems to fix things at my end.
>
> apply at -p0 from petalinux-dist directory.
>
> Thanks,
>
> John
>
> Jim Van Vorst wrote:
> > I turned on some more kernel debugging.  Is this stuff helpful?
> >
> > Freeing unused kernel memory: 80k freed
> > BUG: sleeping function called from invalid context at mm/slab.c:3034
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  23fe5ccc 22331614 00000000 000000d0 00000010 2203bc64 22168d40 00000000
> >  00000001 00000000 00000033 00000fbb 22166440 223310d4 00000000 000000d0
> >  2203c1ac 00000000 23ffd214 223795fc 22331614 22379620 000000d0 00000000
> > Call Trace:
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<2203c1ac>] cache_alloc_refill+0x52c/0x668
> > [<2203c3a4>] kmem_cache_zalloc+0xbc/0xcc
> > [<2205a02c>] mntput_no_expire+0x24/0xc8
> > [<2203c398>] kmem_cache_zalloc+0xb0/0xcc
> > [<220c4cf0>] alloc_tty_struct+0x14/0x28
> > [<221663e8>] _spin_unlock_irqrestore+0x10/0x5c
> > [<22049f6c>] do_path_lookup+0x1c4/0x2f4
> > [<220c8a60>] init_dev+0xe4/0x610
> > [<22047f40>] getname+0x48/0xc0
> > [<220436b8>] cdev_get+0xc/0x20
> > [<220c90b8>] tty_open+0x12c/0x310
> > [<2200af50>] console_device+0x14/0x78
> > [<22043978>] exact_lock+0x8/0x30
> > [<22043844>] chrdev_open+0x154/0x18c
> > [<22043830>] chrdev_open+0x140/0x18c
> > [<2203eb6c>] __dentry_open+0x94/0x1e0
> > [<2204ad40>] open_namei+0x1a0/0x784
> > [<2203eb5c>] __dentry_open+0x84/0x1e0
> > [<220436f0>] chrdev_open+0x0/0x18c
> > [<2203ece4>] nameidata_to_filp+0x2c/0x60
> > [<2203ed40>] do_filp_open+0x28/0x64
> > [<2200ab7c>] vprintk+0x1f8/0x458
> > [<2205a02c>] mntput_no_expire+0x24/0xc8
> > [<2203ed6c>] do_filp_open+0x54/0x64
> > [<2203f1e4>] do_sys_open+0x8c/0xd8
> > [<2203ef48>] get_unused_fd+0x40/0x13c
> > [<22047f40>] getname+0x48/0xc0
> > [<2203f1c4>] do_sys_open+0x6c/0xd8
> > [<2203f184>] do_sys_open+0x2c/0xd8
> > [<22004178>] free_init_pages+0xe4/0x10c
> > [<2203f248>] sys_open+0x18/0x2c
> > [<221669f4>] unlock_kernel+0x24/0x68
> > [<22000364>] init+0x268/0x378
> > [<220b6340>] kobject_release+0x0/0x1c
> > [<22001194>] kernel_thread_helper+0xc/0x20
> > [<22001188>] kernel_thread_helper+0x0/0x20
> >
> > Mounting proc:
> > Mounting var:
> > Populating /var:
> > BUG: sleeping function called from invalid context at 
> > include/linux/buffer_head.h:302
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  23cd1a94 23ff4bac 23e6c580 00000034 00000000 2206c104 22168d40 00000000
> >  00000001 00000000 00000033 0000173a 23e6c580 23e6c580 00000000 23cd1af0
> >  2206e4c0 00000000 2202bbd8 00000001 00000001 00000000 2202bd04 23e6c580
> > Call Trace:
> > [<2206c104>] block_read_full_page+0x334/0x404
> > [<2206e4c0>] blkdev_readpage+0x18/0x2c
> > [<2202bbd8>] add_to_page_cache+0x30/0x1a0
> > [<2202bd04>] add_to_page_cache+0x15c/0x1a0
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2202bd58>] add_to_page_cache_lru+0x10/0x50
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2202d870>] read_cache_page+0x108/0x23c
> > [<2206e2b4>] blkdev_get_block+0x0/0x90
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2208c6b8>] cramfs_read+0x2dc/0x37c
> > [<220317a4>] __alloc_pages+0x70/0x33c
> > [<2208d428>] cramfs_readpage+0x94/0x26c
> > [<2216579c>] mutex_lock+0x1c/0x68
> > [<221b203c>] pty_init+0x2d8/0x6c0
> > [<22166730>] _write_unlock_irq+0xc/0x60
> > [<2202bc28>] add_to_page_cache+0x80/0x1a0
> > [<22034340>] __do_page_cache_readahead+0x150/0x310
> > [<220343b8>] __do_page_cache_readahead+0x1c8/0x310
> > [<220342fc>] __do_page_cache_readahead+0x10c/0x310
> > [<220346a4>] blockable_page_cache_readahead+0x5c/0xf8
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<220221dc>] wake_up_bit+0x24/0x40
> > [<2208bf2c>] cramfs_iget5_test+0x0/0x164
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22057bdc>] wake_up_inode+0x10/0x24
> > [<22057b78>] iget5_locked+0x1cc/0x220
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<220584f4>] unlock_new_inode+0x14/0x28
> > [<22034954>] page_cache_readahead+0x140/0x298
> > [<2208d35c>] cramfs_lookup+0x1e0/0x218
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<2202d234>] do_generic_mapping_read+0x458/0x658
> > [<220b4f20>] _atomic_dec_and_lock+0x6c/0x7c
> > [<2202cf74>] do_generic_mapping_read+0x198/0x658
> > [<2202f430>] generic_file_aio_read+0x1e8/0x2a0
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22049964>] __link_path_walk+0xdec/0x1068
> > [<2203fd44>] do_sync_read+0xb8/0x108
> > [<2202d434>] file_read_actor+0x0/0x108
> > [<2203fec8>] vfs_read+0x134/0x140
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<221b203c>] pty_init+0x2d8/0x6c0
> > [<221b203c>] pty_init+0x2d8/0x6c0
> > [<22022028>] autoremove_wake_function+0x0/0x48
> > [<2204832c>] deny_write_access+0x58/0x8c
> > [<2203fe38>] vfs_read+0xa4/0x140
> > [<22044f2c>] open_exec+0xe0/0x104
> > [<22044f0c>] open_exec+0xc0/0x104
> > [<22044ef0>] open_exec+0xa4/0x104
> > [<22044f88>] kernel_read+0x38/0x58
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<22045ce8>] do_execve+0x50/0x25c
> > [<22007684>] mm_init+0x30/0xb4
> > [<220458fc>] prepare_binprm+0xd0/0xfc
> > [<22044be0>] count+0x40/0x70
> > [<221a5910>] inflate_codes+0x88/0x544
> > [<22007748>] mm_alloc+0x40/0x60
> > [<22045d98>] do_execve+0x100/0x25c
> > [<22045d50>] do_execve+0xb8/0x25c
> > [<22047f40>] getname+0x48/0xc0
> > [<2203f2dc>] filp_close+0x44/0x9c
> > [<220025c4>] sys_execve+0x74/0x9c
> > [<22002574>] sys_execve+0x24/0x9c
> > [<2203f444>] sys_close+0x110/0x128
> > [<22005248>] schedule_tail+0x48/0xfc
> > [<220022e8>] work_pending+0x34/0x3c
> > [<221b203c>] pty_init+0x2d8/0x6c0
> >
> > Running local start scripts.
> > Mounting /etc/config:
> > Populating /etc/config:
> > flatfsd: Created 5 configuration files (133 bytes)
> > Mounting sysfs:
> > Setting hostname:
> > BUG: sleeping function called from invalid context at 
> > include/linux/buffer_head.h:302
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  2384ba94 23ff4bac 23811c38 0000007a 00000000 2206c104 22168d40 00000000
> >  00000001 00000000 00000033 00002415 23811c38 23811c38 00000000 2384baf0
> >  2206e4c0 00000000 2202bbd8 00000001 00000001 00000000 2202bd04 23811c38
> > Call Trace:
> > [<2206c104>] block_read_full_page+0x334/0x404
> > [<2206e4c0>] blkdev_readpage+0x18/0x2c
> > [<2202bbd8>] add_to_page_cache+0x30/0x1a0
> > [<2202bd04>] add_to_page_cache+0x15c/0x1a0
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2202bd58>] add_to_page_cache_lru+0x10/0x50
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2202d870>] read_cache_page+0x108/0x23c
> > [<2206e2b4>] blkdev_get_block+0x0/0x90
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2208c6b8>] cramfs_read+0x2dc/0x37c
> > [<220317a4>] __alloc_pages+0x70/0x33c
> > [<2208d428>] cramfs_readpage+0x94/0x26c
> > [<2216579c>] mutex_lock+0x1c/0x68
> > [<22166730>] _write_unlock_irq+0xc/0x60
> > [<2202bc28>] add_to_page_cache+0x80/0x1a0
> > [<22034340>] __do_page_cache_readahead+0x150/0x310
> > [<220343b8>] __do_page_cache_readahead+0x1c8/0x310
> > [<220342fc>] __do_page_cache_readahead+0x10c/0x310
> > [<220346a4>] blockable_page_cache_readahead+0x5c/0xf8
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<220221dc>] wake_up_bit+0x24/0x40
> > [<2208bf2c>] cramfs_iget5_test+0x0/0x164
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22057bdc>] wake_up_inode+0x10/0x24
> > [<22057b78>] iget5_locked+0x1cc/0x220
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<220584f4>] unlock_new_inode+0x14/0x28
> > [<22034954>] page_cache_readahead+0x140/0x298
> > [<2208d35c>] cramfs_lookup+0x1e0/0x218
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<2202d234>] do_generic_mapping_read+0x458/0x658
> > [<220b4f20>] _atomic_dec_and_lock+0x6c/0x7c
> > [<2202cf74>] do_generic_mapping_read+0x198/0x658
> > [<2202f430>] generic_file_aio_read+0x1e8/0x2a0
> > [<22166478>] _spin_unlock+0x44/0x50
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22049964>] __link_path_walk+0xdec/0x1068
> > [<2203fd44>] do_sync_read+0xb8/0x108
> > [<2202d434>] file_read_actor+0x0/0x108
> > [<2203fec8>] vfs_read+0x134/0x140
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22022028>] autoremove_wake_function+0x0/0x48
> > [<2204832c>] deny_write_access+0x58/0x8c
> > [<2203fe38>] vfs_read+0xa4/0x140
> > [<22044f2c>] open_exec+0xe0/0x104
> > [<22044f0c>] open_exec+0xc0/0x104
> > [<22044ef0>] open_exec+0xa4/0x104
> > [<22044f88>] kernel_read+0x38/0x58
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<22045ce8>] do_execve+0x50/0x25c
> > [<22007684>] mm_init+0x30/0xb4
> > [<220458fc>] prepare_binprm+0xd0/0xfc
> > [<22044be0>] count+0x40/0x70
> > [<221a574c>] flush_window+0x8c/0x104
> > [<22007748>] mm_alloc+0x40/0x60
> > [<22045d98>] do_execve+0x100/0x25c
> > [<22045d50>] do_execve+0xb8/0x25c
> > [<22047f40>] getname+0x48/0xc0
> > [<2203f2dc>] filp_close+0x44/0x9c
> > [<220025c4>] sys_execve+0x74/0x9c
> > [<22002574>] sys_execve+0x24/0x9c
> > [<2203f444>] sys_close+0x110/0x128
> > [<22005248>] schedule_tail+0x48/0xfc
> > [<220022e8>] work_pending+0x34/0x3c
> >
> > Setting up interface lo:
> > Starting DHCP client:
> > Starting thttpd:
> > BUG: sleeping function called from invalid context at 
> > include/linux/buffer_head.h:302
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  238a1a0c 23ff4bac 238114e8 00000151 00000000 2206c104 22168d40 00000000
> >  00000001 00000000 00000033 00003082 238114e8 238114e8 00000000 238a1a68
> >  2206e4c0 00000000 2202bbd8 00000001 00000001 00000000 2202bd04 238114e8
> > Call Trace:
> > [<2206c104>] block_read_full_page+0x334/0x404
> > [<2206e4c0>] blkdev_readpage+0x18/0x2c
> > [<2202bbd8>] add_to_page_cache+0x30/0x1a0
> > [<2202bd04>] add_to_page_cache+0x15c/0x1a0
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2202bd58>] add_to_page_cache_lru+0x10/0x50
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2202d870>] read_cache_page+0x108/0x23c
> > [<2206e2b4>] blkdev_get_block+0x0/0x90
> > [<2206e4a8>] blkdev_readpage+0x0/0x2c
> > [<2208c6b8>] cramfs_read+0x2dc/0x37c
> > [<2208d6a0>] cramfs_uncompress_block+0x74/0x120
> > [<2208c620>] cramfs_read+0x244/0x37c
> > [<2208d5c4>] cramfs_readpage+0x230/0x26c
> > [<2216579c>] mutex_lock+0x1c/0x68
> > [<2202c500>] unlock_page+0x44/0x5c
> > [<22166730>] _write_unlock_irq+0xc/0x60
> > [<22034340>] __do_page_cache_readahead+0x150/0x310
> > [<220343b8>] __do_page_cache_readahead+0x1c8/0x310
> > [<220342fc>] __do_page_cache_readahead+0x10c/0x310
> > [<220346a4>] blockable_page_cache_readahead+0x5c/0xf8
> > [<221661b0>] _spin_lock_irq+0x2c/0x40
> > [<2202c500>] unlock_page+0x44/0x5c
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<220344cc>] __do_page_cache_readahead+0x2dc/0x310
> > [<22034340>] __do_page_cache_readahead+0x150/0x310
> > [<220343b8>] __do_page_cache_readahead+0x1c8/0x310
> > [<220347c4>] make_ahead_window+0x84/0xd4
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<2208bf2c>] cramfs_iget5_test+0x0/0x164
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<220349e4>] page_cache_readahead+0x1d0/0x298
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<2202d234>] do_generic_mapping_read+0x458/0x658
> > [<22166168>] _spin_lock_irqsave+0x30/0x4c
> > [<2202cf74>] do_generic_mapping_read+0x198/0x658
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<2202f430>] generic_file_aio_read+0x1e8/0x2a0
> > [<220316ec>] get_page_from_freelist+0x440/0x488
> > [<22166428>] _spin_unlock_irqrestore+0x50/0x5c
> > [<221663e8>] _spin_unlock_irqrestore+0x10/0x5c
> > [<221661b0>] _spin_lock_irq+0x2c/0x40
> > [<2203fd44>] do_sync_read+0xb8/0x108
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<2202d434>] file_read_actor+0x0/0x108
> > [<22073d20>] load_flat_binary+0x650/0xbdc
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<22045044>] set_task_comm+0x38/0x64
> > [<221663e8>] _spin_unlock_irqrestore+0x10/0x5c
> > [<22022028>] autoremove_wake_function+0x0/0x48
> > [<2203a6e0>] do_mremap+0xc4/0x108
> > [<221a55bc>] huft_build+0x4f8/0x5fc
> > [<22025ff4>] down_write+0x28/0x40
> > [<22073c04>] load_flat_binary+0x534/0xbdc
> > [<22045b74>] search_binary_handler+0x78/0x19c
> > [<2203fe38>] vfs_read+0xa4/0x140
> > [<22044d18>] copy_strings+0x108/0x200
> > [<221664e0>] _read_unlock+0xc/0x50
> > [<220413f0>] __fput+0x150/0x1ac
> > [<220736d0>] load_flat_binary+0x0/0xbdc
> > [<22045dfc>] do_execve+0x164/0x25c
> > [<220025c4>] sys_execve+0x74/0x9c
> > [<2203f444>] sys_close+0x110/0x128
> > [<2203a55c>] sys_munmap+0x4c/0x74
> > [<220022e8>] work_pending+0x34/0x3c
> >
> >
> > jimtest8 login: root
> > BUG: sleeping function called from invalid context at mm/slab.c:3034
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  238e5e40 2237cf9c 00000000 000000d0 00000010 2203bc64 22168d40 00000000
> >  00000001 00000000 00000033 00003d43 220c591c 2233117c 00000000 000000d0
> >  2203c1ac 00000000 23ffd994 23ffacc0 2237cf9c 23fface4 000000d0 00000000
> > Call Trace:
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<220c591c>] tty_ldisc_deref+0xa0/0xac
> > [<2203c1ac>] cache_alloc_refill+0x52c/0x668
> > [<2203bc70>] kmem_cache_alloc+0xa0/0xb0
> > [<220c6124>] tty_write+0x224/0x26c
> > [<220cc164>] write_chan+0x0/0x38c
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<22047f1c>] getname+0x24/0xc0
> > [<22002574>] sys_execve+0x24/0x9c
> > [<2204e44c>] sys_ioctl+0x28/0x98
> > [<220022e8>] work_pending+0x34/0x3c
> > [<220022e8>] work_pending+0x34/0x3c
> > [<220022e8>] work_pending+0x34/0x3c
> >
> > Password:
> > BUG: sleeping function called from invalid context at mm/slab.c:3034
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  238e5d08 22331b54 00000007 000040d0 00000010 2203bc64 22168d40 00000000
> >  00000001 00000000 00000033 00004001 22025ff4 2233117c 00000000 000040d0
> >  2203c1ac 00000000 23ffe908 22379bfc 22331b54 22379c20 000040d0 00000000
> > Call Trace:
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<22025ff4>] down_write+0x28/0x40
> > [<2203c1ac>] cache_alloc_refill+0x52c/0x668
> > [<2203c530>] __kmalloc+0xd8/0xe8
> > [<221661b0>] _spin_lock_irq+0x2c/0x40
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22048194>] permission+0x88/0xf4
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<22045044>] set_task_comm+0x38/0x64
> > [<2203c518>] __kmalloc+0xc0/0xe8
> > [<22039f34>] do_mmap_pgoff+0x68c/0x9d8
> > [<22039b6c>] do_mmap_pgoff+0x2c4/0x9d8
> > [<22045704>] flush_old_exec+0x694/0x7bc
> > [<221a503c>] prompt_ramdisk+0x20/0x34
> > [<22073be0>] load_flat_binary+0x510/0xbdc
> > [<22025fe8>] down_write+0x1c/0x40
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<221a5b08>] inflate_codes+0x280/0x544
> > [<22025ff4>] down_write+0x28/0x40
> > [<22045b74>] search_binary_handler+0x78/0x19c
> > [<2203fe38>] vfs_read+0xa4/0x140
> > [<22044d18>] copy_strings+0x108/0x200
> > [<22044d18>] copy_strings+0x108/0x200
> > [<221664e0>] _read_unlock+0xc/0x50
> > [<221661b0>] _spin_lock_irq+0x2c/0x40
> > [<220736d0>] load_flat_binary+0x0/0xbdc
> > [<22045dfc>] do_execve+0x164/0x25c
> > [<220025c4>] sys_execve+0x74/0x9c
> > [<220022e8>] work_pending+0x34/0x3c
> > [<220022e8>] work_pending+0x34/0x3c
> >
> > #
> > BUG: sleeping function called from invalid context at mm/slab.c:3034
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  238e5e0c 22331764 00000001 000040d0 00000010 2203bc64 22168d40 00000000
> >  00000001 00000000 00000033 00004001 221663e8 2233117c 00000000 000040d0
> >  2203c1ac 00000000 23ffe608 2237977c 22331764 223797a0 000040d0 00000000
> > Call Trace:
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<221663e8>] _spin_unlock_irqrestore+0x10/0x5c
> > [<2203c1ac>] cache_alloc_refill+0x52c/0x668
> > [<2203c530>] __kmalloc+0xd8/0xe8
> > [<221661b0>] _spin_lock_irq+0x2c/0x40
> > [<220b8f14>] __up_write+0x11c/0x1d4
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<2203c518>] __kmalloc+0xc0/0xe8
> > [<22039f34>] do_mmap_pgoff+0x68c/0x9d8
> > [<22039b6c>] do_mmap_pgoff+0x2c4/0x9d8
> > [<22039ef4>] do_mmap_pgoff+0x64c/0x9d8
> > [<220027b4>] sys_mmap+0x88/0x114
> > [<22025fe8>] down_write+0x1c/0x40
> > [<221a5b08>] inflate_codes+0x280/0x544
> > [<22025ff4>] down_write+0x28/0x40
> > [<220022e8>] work_pending+0x34/0x3c
> > [<220022e8>] work_pending+0x34/0x3c
> >
> > #
> > #
> > #
> > #
> > #
> > #
> > #
> > #
> > BUG: sleeping function called from invalid context at mm/slab.c:3034
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  238e5e0c 22331764 00000001 000040d0 00000010 2203bc64 22168d40 00000000
> >  00000001 00000000 00000033 00004001 221663e8 2233117c 00000000 000040d0
> >  2203c1ac 00000000 23ffe608 2237977c 22331764 223797a0 000040d0 00000000
> > Call Trace:
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<221663e8>] _spin_unlock_irqrestore+0x10/0x5c
> > [<2203c1ac>] cache_alloc_refill+0x52c/0x668
> > [<2203c530>] __kmalloc+0xd8/0xe8
> > [<221661b0>] _spin_lock_irq+0x2c/0x40
> > [<220b8f14>] __up_write+0x11c/0x1d4
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<2203c518>] __kmalloc+0xc0/0xe8
> > [<22039f34>] do_mmap_pgoff+0x68c/0x9d8
> > [<22039b6c>] do_mmap_pgoff+0x2c4/0x9d8
> > [<22039ef4>] do_mmap_pgoff+0x64c/0x9d8
> > [<220027b4>] sys_mmap+0x88/0x114
> > [<22025fe8>] down_write+0x1c/0x40
> > [<221a5b08>] inflate_codes+0x280/0x544
> > [<22025ff4>] down_write+0x28/0x40
> > [<220022e8>] work_pending+0x34/0x3c
> > [<220022e8>] work_pending+0x34/0x3c
> >
> > #
> > #
> > #
> > #
> > #
> > #
> > # more /proc/partitions
> > BUG: sleeping function called from invalid context at mm/slab.c:3034
> > in_atomic():0, irqs_disabled():1
> >
> > Stack:
> >  23901e40 2237cf9c 00000000 000000d0 00000010 2203bc64 22168d40 00000000
> >  00000001 00000000 00000033 00004001 80641800 2233117c 00000000 000000d0
> >  2203c1ac 00000000 23ffd994 23ffacc0 2237cf9c 23fface4 000000d0 00000000
> > Call Trace:
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<2203c1ac>] cache_alloc_refill+0x52c/0x668
> > [<2203bc70>] kmem_cache_alloc+0xa0/0xb0
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<220196c0>] do_sigaction+0x1a8/0x1e8
> > [<2203bc64>] kmem_cache_alloc+0x94/0xb0
> > [<22047f1c>] getname+0x24/0xc0
> > [<22166124>] _spin_lock+0x1c/0x30
> > [<22166440>] _spin_unlock+0xc/0x50
> > [<22166530>] _spin_unlock_irq+0xc/0x60
> > [<22002574>] sys_execve+0x24/0x9c
> > [<220022e8>] work_pending+0x34/0x3c
> > [<220022e8>] work_pending+0x34/0x3c
> >
> > << /proc/partitions >>
> > major minor  #blocks  name
> >
> >  31     0        768 mtdblock0
> >  31     1        256 mtdblock1
> > BUG: scheduling while atomic: more/0x7200546f/52
> >
> > Stack:
> >  2395fda4 2395ff78 00000000 23c3ff1c 00000000 22001dd4 22168de8 2389c1e4
> >  7200546f 00000034 00989680 00000000 2395ff99 00000008 00000003 00000005
> >  00000001 0000001f 2395ff78 00000000 23c3ff1c 00000000 00000000 00000000
> > Call Trace:
> > [<22001dd4>] ret_from_intr+0x1c/0x40
> >
> >  31     2        256 mtdblock2
> >  31     3        128 mtdblock3
> >  31     4       4096 mtdblock4
> >  31     5       1024 mtdblock5
> >  31     6       9216 mtdblock6
> >  31     7       1424 mtdblock7
> > #
> >
> > John Williams wrote:
> >
> > > Hi Jim,
> > >
> > > These things are tricky to track down - I'm working to clear my desk 
> > > so I can get some quality tyime on it.  Stay tuned.
> > >
> > > John
> > >
> > > Jim Van Vorst wrote:
> > >
> > > > More info:
> > > > BUG: scheduling while atomic: more/0x7200546f/101
> > > >
> > > > Stack:
> > > >  239afd20 00000001 00000018 239afefc 00000ff9 22001cb4 22155cc0 
> > > > 238698f0
> > > >  7200546f 00000065 00989680 00000000 239ae000 00000008 00000074 
> > > > 0000000a
> > > >  00000001 00000018 239afefc 00000ff9 2397fec8 00000001 00000000 
> > > > 00000000
> > > > Call Trace:
> > > > [<22001cb4>] ret_from_intr+0x1c/0x40
> > > >
> > > > I can get this with thttpd as well with:
> > > > while [ 1 ]; do curl http://[ipaddress] > /dev/null; done
> > > >
> > > > yields
> > > >
> > > > BUG: scheduling while atomic: thttpd/0xfff90000/46
> > > >
> > > > Stack:
> > > >  2389ba30 00000001 00000016 00000000 00000005 22001cb4 22155cc0 
> > > > 23869b50
> > > >  fff90000 0000002e 00989680 00000019 2389a000 00000008 2389ffa8 
> > > > 00000009
> > > >  00000001 00000016 00000000 00000005 2389c0f4 2389c018 23894fac 
> > > > 00000000
> > > > Call Trace:
> > > > [<22001cb4>] ret_from_intr+0x1c/0x40
> > > > [<22000000>] _start+0x0/0x50
> > > > [<220ea494>] skb_release_data+0x88/0xf4
> > > > [<220ea494>] skb_release_data+0x88/0xf4
> > > > [<220ea260>] kfree_skbmem+0x84/0xf0
> > > > [<220ea1e8>] kfree_skbmem+0xc/0xf0
> > > > [<2211b0a0>] tcp_cong_avoid+0x14/0x38
> > > > [<220ea1e8>] kfree_skbmem+0xc/0xf0
> > > > [<220094fc>] __call_console_drivers+0x64/0x88
> > > > [<2200ed70>] __do_softirq+0x28/0x3c
> > > > [<220095b8>] _call_console_drivers+0x98/0xb0
> > > > [<22026488>] handle_IRQ_event+0x5c/0xc8
> > > > [<220aeb80>] vscnprintf+0xc/0x38
> > > > [<220ae8c0>] vsnprintf+0x37c/0x630
> > > > [<22009904>] release_console_sem+0x110/0x2b0
> > > > [<22009c98>] vprintk+0x1d0/0x3b8
> > > > [<22009b30>] vprintk+0x68/0x3b8
> > > > [<22001728>] do_IRQ+0x40/0x54
> > > > [<22009ea0>] printk+0x20/0x34
> > > > [<220aec78>] sprintf+0x28/0x3c
> > > > [<22001cb4>] ret_from_intr+0x1c/0x40
> > > > [<220055f4>] scheduler_tick+0x18/0xa8
> > > >
> > > > Reverting to the 2.4 kernel doesn't produce these messages, but I 
> > > > think that's just because
> > > > the checking isn't in there.  It still barfs, but silently.
> > > >
> > > > This is on a microblaze spartan3E 1600.
> > > >
> > > > Any ideas?
> > > >
> > > > thanks,
> > > > jim
> > > >
> > > > Jim Van Vorst wrote:
> > > >
> > > > > I get this a lot as well:
> > > > >
> > > > > # more /proc/partitions
> > > > > << /proc/partitions >>
> > > > > major minor  #blocks  name
> > > > >
> > > > >  31     0        768 mtdblock0
> > > > >  31     1        256 mtdblock1
> > > > >  31     2        256 mtdblock2
> > > > >  31     3        128 mtdblock3
> > > > >  31     4       4096 mtdblock4
> > > > >  31     5       1024 mtdblock5
> > > > >  31     6   BUG: scheduling while atomic: sh/0x00000008/47
> > > > >
> > > > > Stack:
> > > > >  23effc08 2200ed08 23e9140c 00000000 00000000 22001c54 22161ca0 
> > > > > 23c9d8ec
> > > > >  00000008 0000002f 01c9c380 0000000e 23efe000 00000008 00000000 
> > > > > 00000000
> > > > >  23efffbd 23e9140c 00000000 00000000 2397ff1c 00000000 00000000 
> > > > > 23e91c54
> > > > > Call Trace: [<2200ed08>] [<22001c54>] [<2215daa4>] [<2200ed08>] 
> > > > > [<220016b4>]
> > > > >    9216 mtdblock6
> > > > >  31     7       1424 mtdblock7
> > > > >
> > > > > I then tried enabling CONFIG_PREEMPT:
> > > > >
> > > > > # more /proc/partitions
> > > > > << /proc/partitions >>
> > > > > maBUG: scheduling while atomic: more/0x7200546f/54
> > > > >
> > > > > Stack:
> > > > >  238efd34 00000000 2397ff1c 00000000 22001758 22001dd4 2217dcb0 
> > > > > 238818f0
> > > > >  7200546f 00000036 221b9bf0 00000000 00000008 238ee670 238ee474 
> > > > > 0000001b
> > > > >  00000000 238eff78 00000000 2397ff1c 00000000 00000000 00000000 
> > > > > 238efe24
> > > > > Call Trace: [<22001758>] [<22001dd4>]
> > > > > jor minor  #blocks  name
> > > > >
> > > > >  31     0        768 mtdblock0
> > > > >  31     1        BUG: scheduling while atomic: more/0x7200546f/54
> > > > >
> > > > > Stack:
> > > > >  238efda0 00000000 2397ff1c 00000000 22001758 22001dd4 2217dcb0 
> > > > > 238818f0
> > > > >  7200546f 00000036 00989680 00000000 00000008 00000020 00000005 
> > > > > 00000001
> > > > >  0000000f 238eff78 00000000 2397ff1c 00000000 00000000 00000000 
> > > > > 238efe90
> > > > > Call Trace: [<22001758>] [<22001dd4>]
> > > > > 256 mtdblock1
> > > > >  31     2        256 mtdblock2
> > > > >  31     3        128 mtdblock3
> > > > >  31     4       4096 mtdblock4
> > > > >  31     5       1024 mtdblock5
> > > > >  31     6       9216 mtdblock6
> > > > >  31     7       1424 mtdblock7
> > > > >
> > > > > Woohoo!  Crashes in more instead of sh...
> > > > >
> > > > > I don't get these all the time but it's very easy to replicate.
> > > > > Sometimes my board keeps going, sometimes it freezes.
> > > > > It's not just more or cat.  Basically any command will do it.
> > > > > I don't remember getting these with the 2.4 kernel.
> > > > >
> > > > > John Williams wrote:
> > > > >
> > > > > > Hi Chun Yeow,
> > > > > >
> > > > > > Thanks for the report - we'll look into it and let you know via 
> > > > > > the list.
> > > > > >
> > > > > > Thanks again,
> > > > > >
> > > > > > John
> > > > > >
> > > > > > Yeoh Chun Yeow wrote:
> > > > > >
> > > > > > > Dear all,
> > > > > > >
> > > > > > > I compile the 2.6 kernel in the petalogix distribution. My file 
> > > > > > > system is in romfs format.
> > > > > > >
> > > > > > > I have found "BUG: scheduling while atomic: sh/0x00000008/43" in 
> > > > > > > my kernel execution.
> > > > > > >
> > > > > > > BUG: scheduling while atomic: sh/0x00000008/43
> > > > > > >
> > > > > > > Stack:
> > > > > > >   27efeac4 27ece5cc 245d1d20 00000001 0000005b 24001ed4 2418a0e4 
> > > > > > > 244ea1c4
> > > > > > >   00000008 0000002b 0ba0f600 27efea30 00000008 245d15e0 245d15e0 
> > > > > > > 2459e000
> > > > > > >   27ece5cc 245d1d20 00000001 0000005b 27effc30 00000000 00000000 
> > > > > > > 27efebb4
> > > > > > > Call Trace:
> > > > > > > [<24001ed4>] ret_from_intr+0x1c/0x40
> > > > > > >
> > > > > > >
> > > > > > > After I enable in CONFIG_PREEMPT, thing get better.
> > > > > > >
> > > > > > > But, now when I doing the ping, the following bugs occur:
> > > > > > >
> > > > > > >  bytes from 199.20.6.174 <http://199.20.6.174>: icmp_BUG: 
> > > > > > > scheduling while atomic: ping/0x00000002/62
> > > > > > >
> > > > > > > Stack:
> > > > > > >   2465fc14 27cb28b0 000000c0 00000000 27d1e120 241a7f9c 241ab0a8 
> > > > > > > 27d1b1d8
> > > > > > >   00000002 0000003e 2465e000 000000a2 240166c0 7fffffff 00000000 
> > > > > > > 2465fc8c
> > > > > > >   2465fce0 2465fd18 00000000 00000000 27cb28b0 000000c0 00000000 
> > > > > > > 2411b36c
> > > > > > > Call Trace:
> > > > > > >
> > > > > > > What is the reason behind that? Any ideas?
> > > > > > >
> > > > > > > Please advice. Thanks
> > > > > > >
> > > > > > > regards,
> > > > > > > chun yeow
> > > > > >
> > > > > > ___________________________
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