On Tue, Mar 18, 2014 at 5:41 AM, Heiko Carstens <heiko.carstens@xxxxxxxxxx> wrote: > Given that this is just an addon patch to Davidlohr's "mm: per-thread > vma caching" patch I was wondering if something in there is architecture > specific. > But it doesn't look like that. So I'm wondering if this only breaks on > s390? I'm seeing this same BUG_ON() on ia64 (when trying out next-20140318) Starting HAkernel BUG at mm/vmacache.c:76! L daemon7[?25lps[3259]: bugcheck! 0 [1] Modules linked in: mptctl CPU: 0 PID: 3259 Comm: ps Not tainted 3.14.0-rc7-zx1-smp-next-20140318 #1 Hardware name: hp server rx2620 , BIOS 03.17 03/31/2005 task: e000000001070000 ti: e000000001070c80 task.ti: e000000001070c80 psr : 0000101008526038 ifs : 8000000000000309 ip : [<a00000010019a930>] Not tainted (3.14.0-rc7-zx1-smp-next-20140318) ip is at vmacache_find+0x1d0/0x1e0 unat: 0000000000000000 pfs : 0000000000000309 rsc : 0000000000000003 rnat: 0009804c0270033f bsps: a00000010153e470 pr : 0000000019a99565 ldrs: 0000000000000000 ccv : 00000010e0bb89b1 fpsr: 0009804c0270033f csd : 0000000000000000 ssd : 0000000000000000 b0 : a00000010019a930 b6 : a0000001006cff20 b7 : a0000001006d1a40 f6 : 1003e000000167080aa40 f7 : 1003e0000000000000514 f8 : 1003e000000167080a52c f9 : 1003e0000000000000001 f10 : 1003e501ac672552bd930 f11 : 1003e0000000000000004 r1 : a00000010176aa00 r2 : a00000010153e468 r3 : a00000010156b5e0 r8 : 000000000000001f r9 : 0000000000001b14 r10 : ffffffffffffffff r11 : 0000000000000000 r12 : e000000001077df0 r13 : e000000001070000 r14 : a00000010153e470 r15 : a00000010153e470 r16 : 000000001b140d8a r17 : 0000000000000000 r18 : 0000000000007fff r19 : 0000000000000182 r20 : 0000000000000003 r21 : 0000000000000000 r22 : 0000000000000182 r23 : a00000010130a9a8 r24 : a0000001006cff20 r25 : a00000010130a9a8 r26 : a0000001006cff20 r27 : a000000101544658 r28 : a0000001015e2508 r29 : a00000010130a998 r30 : a0000001006cfec0 r31 : a0000001015e23e0 Call Trace: [<a000000100015460>] show_stack+0x80/0xa0 sp=e0000000010779b0 bsp=e0000000010712e0 [<a000000100015ac0>] show_regs+0x640/0x920 sp=e000000001077b80 bsp=e000000001071288 [<a0000001000424c0>] die+0x1a0/0x2e0 sp=e000000001077b90 bsp=e000000001071248 [<a000000100042650>] die_if_kernel+0x50/0x80 sp=e000000001077b90 bsp=e000000001071218 [<a000000100f3df10>] ia64_bad_break+0x3d0/0x6e0 sp=e000000001077b90 bsp=e0000000010711e8 [<a00000010000c740>] ia64_native_leave_kernel+0x0/0x270 sp=e000000001077c20 bsp=e0000000010711e8 [<a00000010019a930>] vmacache_find+0x1d0/0x1e0 sp=e000000001077df0 bsp=e0000000010711a0 [<a0000001001b4cb0>] find_vma+0x30/0x140 sp=e000000001077df0 bsp=e000000001071170 [<a0000001001b4df0>] find_extend_vma+0x30/0x140 sp=e000000001077df0 bsp=e000000001071138 [<a0000001001a9080>] __get_user_pages+0x120/0xd60 sp=e000000001077df0 bsp=e000000001071010 [<a0000001001a9dd0>] get_user_pages+0x70/0xa0 sp=e000000001077e10 bsp=e000000001070fb0 [<a0000001001a9eb0>] __access_remote_vm+0xb0/0x360 sp=e000000001077e10 bsp=e000000001070f18 [<a0000001001aa1c0>] access_process_vm+0x60/0xa0 sp=e000000001077e20 bsp=e000000001070ed0 [<a00000010018a390>] get_cmdline+0xb0/0x240 sp=e000000001077e20 bsp=e000000001070e88 [<a0000001002ca2f0>] proc_pid_cmdline+0x30/0x60 sp=e000000001077e20 bsp=e000000001070e60 [<a0000001002c7880>] proc_info_read+0x120/0x200 sp=e000000001077e20 bsp=e000000001070e10 [<a000000100201da0>] vfs_read+0x140/0x340 sp=e000000001077e20 bsp=e000000001070dc0 [<a000000100202180>] SyS_read+0xa0/0x120 sp=e000000001077e20 bsp=e000000001070d40 [<a00000010000c5c0>] ia64_ret_from_syscall+0x0/0x20 sp=e000000001077e30 bsp=e000000001070d40 [<a000000000040720>] ia64_ivt+0xffffffff00040720/0x400 sp=e000000001078000 bsp=e000000001070d40 Disabling lock debugging due to kernel taint -- 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=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>