Messages in this thread | | | From | Larry Finger <> | Subject | Sleeping BUG in khugepaged for i586 | Date | Sat, 3 Jun 2017 14:24:26 -0500 |
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I recently turned on locking diagnostics for a Dell Latitude D600 laptop, which requires a 32-bit kernel. In the log I found the following:
BUG: sleeping function called from invalid context at mm/khugepaged.c:655 in_atomic(): 1, irqs_disabled(): 0, pid: 20, name: khugepaged 1 lock held by khugepaged/20: #0: (&mm->mmap_sem){++++++}, at: [<c03d6609>] collapse_huge_page.isra.47+0x439/0x1240 CPU: 0 PID: 20 Comm: khugepaged Tainted: G W 4.12.0-rc1-wl-12125-g952a068 #80 Hardware name: Dell Computer Corporation Latitude D600 /03U652, BIOS A05 05/29/2003 Call Trace: dump_stack+0x76/0xb2 ___might_sleep+0x174/0x230 collapse_huge_page.isra.47+0xacf/0x1240 khugepaged_scan_mm_slot+0x41e/0xc00 ? _raw_spin_lock+0x46/0x50 khugepaged+0x277/0x4f0 ? prepare_to_wait_event+0xe0/0xe0 kthread+0xeb/0x120 ? khugepaged_scan_mm_slot+0xc00/0xc00 ? kthread_create_on_node+0x30/0x30 ret_from_fork+0x21/0x30
I have no idea when this problem was introduced. Of course, I will test any proposed fixes.
Thanks,
Larry
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