• Heiko Carstens's avatar
    s390/numa: establish cpu to node mapping early · 8c910580
    Heiko Carstens authored
    Initialize the cpu topology and therefore also the cpu to node mapping
    much earlier. Fixes this warning and subsequent crashes when using the
    fake numa emulation mode on s390:
    
    WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:121 select_task_rq+0xe6/0x1a8
    CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.6.0-rc6-00001-ge9d867a6-dirty #28
    task: 00000001dd270008 ti: 00000001eccb4000 task.ti: 00000001eccb4000
    Krnl PSW : 0404c00180000000 0000000000176c56 (select_task_rq+0xe6/0x1a8)
               R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
    Call Trace:
    ([<0000000000176c30>] select_task_rq+0xc0/0x1a8)
    ([<0000000000177d64>] try_to_wake_up+0x2e4/0x478)
    ([<000000000015d46c>] create_worker+0x174/0x1c0)
    ([<0000000000161a98>] alloc_unbound_pwq+0x360/0x438)
    ([<0000000000162550>] apply_wqattrs_prepare+0x200/0x2a0)
    ([<000000000016266a>] apply_workqueue_attrs_locked+0x7a/0xb0)
    ([<0000000000162af0>] apply_workqueue_attrs+0x50/0x78)
    ([<000000000016441c>] __alloc_workqueue_key+0x304/0x520)
    ([<0000000000ee3706>] default_bdi_init+0x3e/0x70)
    ([<0000000000100270>] do_one_initcall+0x140/0x1d8)
    ([<0000000000ec9da8>] kernel_init_freeable+0x220/0x2d8)
    ([<0000000000984a7a>] kernel_init+0x2a/0x150)
    ([<00000000009913fa>] kernel_thread_starter+0x6/0xc)
    ([<00000000009913f4>] kernel_thread_starter+0x0/0xc)
    Reviewed-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
    Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    8c910580
toptree.c 8.77 KB