Messages in this thread |  | | | Date | Sun, 22 Sep 2002 22:31:04 -0700 | | From | Andrew Morton <> | | Subject | Re: 2.5.38-mm1 dbench 512 might sleep backtrace emitted |
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William Lee Irwin III wrote: > > Trace; c01175f7 <__might_sleep+27/2b> > Trace; c0139764 <__alloc_pages+24/24c> > Trace; f8e74698 <END_OF_CODE+38ac8334/????> > Trace; c011300d <pte_alloc_one+41/118> > Trace; c012b89d <pte_alloc_map+4d/214> > Trace; c012da28 <vmtruncate+138/164> > Trace; c0133f68 <move_one_page+e8/328> > Trace; c0134091 <move_one_page+211/328> > Trace; c01341d9 <move_page_tables+31/7c> > Trace; c0134870 <do_mremap+64c/7cc> > Trace; c0134a40 <sys_mremap+50/73> > Trace; c010746f <syscall_call+7/b>
Well I can't immediately see any held locks on that path, can you? Odd.
Might be best to put a breakpoint on the printk in __might_sleep(), get some more info if it bites again.
If there _are_ no locks held in that chain then there is something wrong with in_atomic(). So check the current task state with `task25' and `thread25' from my .gdbinit.
set editing on set radix 0x0a
define rmt set remotebaud 115200 target remote /dev/ttyS0 end
define comm25 p ((struct thread_info *)((int)$esp & ~0x1fff))->task->comm end
define task25 p ((struct thread_info *)((int)$esp & ~0x1fff))->task end
define thread25 p ((struct thread_info *)((int)$esp & ~0x1fff)) end
define reboot maintenance packet r end
define page_states printf "Dirty: %dK\n", (page_states[0].nr_dirty + page_states[1].nr_dirty + page_states[2].nr_dirty + page_states[3].nr_dirty) * 4 printf "Writeback: %dK\n", (page_states[0].nr_writeback + page_states[1].nr_writeback + page_states[2].nr_writeback + page_states[3].nr_writeback) * 4 printf "Pagecache: %dK\n", (page_states[0].nr_pagecache + page_states[1].nr_pagecache + page_states[2].nr_pagecache + page_states[3].nr_pagecache) * 4 printf "Page Table Pages: %d\n", (page_states[0].nr_page_table_pages + page_states[1].nr_page_table_pages + page_states[2].nr_page_table_pages + page_states[3].nr_page_table_pages) * 4 printf "nr_reverse_maps: %d\n", page_states[0].nr_reverse_maps + page_states[1].nr_reverse_maps + page_states[2].nr_reverse_maps + page_states[3].nr_reverse_maps end
define offsetof set $off = &(((struct $arg0 *)0)->$arg1) printf "%d 0x%x\n", $off, $off end
# list_entry list type member define list_entry set $off = (int)&(((struct $arg1 *)0)->$arg2) set $addr = (int)$arg0 set $res = $addr - $off printf "0x%x\n", $res end - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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