> On Nov 19, 2015, at 14:58, Kirill A. Shutemov <kirill@xxxxxxxxxxxxx> wrote: > > uncharged i also encounter this crash , also i encounter a crash like this in qemu: [ 2.703436] [<ffffffc0001d4d2c>] do_execveat_common.isra.36+0x4f0/0x630 [ 2.703624] [<ffffffc0001d4e90>] do_execve+0x24/0x30 [ 2.703767] [<ffffffc0001d50e0>] SyS_execve+0x1c/0x2c [ 2.703923] BUG: Bad page map in process init pte:6000004837ebd3 pmd:b29e7003 [ 2.704140] page:ffffffc07f00af80 count:2 mapcount:-1 mapping: (null) index:0x1 [ 2.704414] flags: 0x400000000014(referenced|dirty) [ 2.704563] page dumped because: bad pte [ 2.704666] addr:0000007fafb7e000 vm_flags:00100073 anon_vma:ffffffc0729bdb90 mapping: (null) index:7fafb7e [ 2.704906] file: (null) fault: (null) mmap: (null) readpage: (null) [ 2.705117] CPU: 0 PID: 84 Comm: init Tainted: G B 4.2.0ajb-00005-g11a9bf3 #80 [ 2.705315] Hardware name: ranchu (DT) [ 2.705408] Call trace: [ 2.705488] [<ffffffc000089ea0>] dump_backtrace+0x0/0x124 [ 2.705657] [<ffffffc000089fd4>] show_stack+0x10/0x1c [ 2.705797] [<ffffffc0005f1df0>] dump_stack+0x78/0x98 [ 2.705971] [<ffffffc00018a8d4>] print_bad_pte+0x154/0x1f0 [ 2.706102] [<ffffffc00018c5f4>] unmap_single_vma+0x574/0x704 [ 2.706236] [<ffffffc00018d0a4>] unmap_vmas+0x54/0x70 [ 2.706354] [<ffffffc000195e70>] exit_mmap+0x88/0xfc [ 2.706473] [<ffffffc000097af4>] mmput+0x48/0xe8 [ 2.706584] [<ffffffc0001d3b64>] flush_old_exec+0x30c/0x79c [ 2.706719] [<ffffffc000225fa4>] load_elf_binary+0x21c/0x1098 [ 2.706856] [<ffffffc0001d4330>] search_binary_handler+0xa8/0x224 [ 2.706995] [<ffffffc0001d4d2c>] do_execveat_common.isra.36+0x4f0/0x630 [ 2.707144] [<ffffffc0001d4e90>] do_execve+0x24/0x30 [ 2.707263] [<ffffffc0001d50e0>] SyS_execve+0x1c/0x2c [ 2.707392] BUG: Bad page map in process init pte:6000004837fbd3 pmd:b29e7003 [ 2.707752] page:ffffffc07f00afc0 count:2 mapcount:-1 mapping: (null) index:0x1 [ 2.708167] flags: 0x400000000014(referenced|dirty) [ 2.708333] page dumped because: bad pte [ 2.708501] addr:0000007fafb7f000 vm_flags:00100073 anon_vma:ffffffc0729bdb90 mapping: (null) index:7fafb7f [ 2.709084] file: (null) fault: (null) mmap: (null) readpage: (null) [ 2.709306] CPU: 0 PID: 84 Comm: init Tainted: G B 4.2.0ajb-00005-g11a9bf3 #80 [ 2.709494] Hardware name: ranchu (DT) seems the page map count is not correct .. i build is based on mmotm-2015-10-21-14-41 Thanks -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href