From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dhaval Giani Subject: Re: Re: Hang with fair cgroup scheduler (reproducer is attached.) Date: Fri, 14 Dec 2007 21:08:23 +0530 Message-ID: <20071214153823.GC23670@linux.vnet.ibm.com> References: <20071214141528.GA6161@linux.vnet.ibm.com> <20071214161834.034e6efe.kamezawa.hiroyu@jp.fujitsu.com> <20071214171759.59f7ba57.kamezawa.hiroyu@jp.fujitsu.com> <20071214094909.GG11266@elte.hu> <20071214195837.0d3511db.kamezawa.hiroyu@jp.fujitsu.com> <20442799.1197642268756.kamezawa.hiroyu@jp.fujitsu.com> <20071214153607.GB23670@linux.vnet.ibm.com> Reply-To: Dhaval Giani Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20071214153607.GB23670-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org Cc: Peter Zijlstra , vatsa-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org, Dmitry Adamushko , containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org, Ingo Molnar , Andrew Morton List-Id: containers.vger.kernel.org On Fri, Dec 14, 2007 at 09:06:07PM +0530, Dhaval Giani wrote: > On Fri, Dec 14, 2007 at 11:24:28PM +0900, kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org wrote: > > >> just to be sure SMP does matter here (most likely yes, I guess). > > >> > > > > > >NUMA? I am not able to reproduce it here locally on an x86 8 CPU box. > > > > > yes. I used NUMA. 2 Nodes/4CPU x 2 > > > > OK, I got hold of an IA64 box, non numa and have managed to reproduce > it. > Actually no, its another bug. Thanks for the program! reg[3330]: NaT consumption 2216203124768 [1] Modules linked in: ipv6 button binfmt_misc nls_iso8859_1 loop dm_mod tg3 ext3 jbd fan thermal processor sg mptspi mptscsih mptbase scsi_transport_spi via82cxxx sd_mod scsi_mod ide_disk ide_core Pid: 3330, CPU 3, comm: reg psr : 00001210085a2010 ifs : 8000000000000308 ip : [] Not tainted ip is at rb_erase+0x301/0x7e0 unat: 0000000000000000 pfs : 0000000000000308 rsc : 0000000000000003 rnat: 0000000000000000 bsps: 0000000000000000 pr : a5565666a9556959 ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c0270033f csd : 0000000000000000 ssd : 0000000000000000 b0 : a000000100076290 b6 : a000000100086b20 b7 : a000000100076360 f6 : 1003e0000000000000d34 f7 : 1003e000000000000000a f8 : 1003e0000000000000000 f9 : 1003e0000000000000152 f10 : 1003e0000000000000004 f11 : 0fff2fffffffff0000000 r1 : a000000100c92030 r2 : e000000244bd0068 r3 : e000000245882000 r8 : e000000245882000 r9 : e000000241e6eda0 r10 : 0000000000000001 r11 : e0000002458f0070 r12 : e0000002458a7d80 r13 : e0000002458a0000 r14 : e000000244bd0060 r15 : e000000244bd0058 r16 : 0000000000000000 r17 : e000000245920d34 r18 : 0000000000000000 r19 : 0000000000000000 r20 : e000000245920c90 r21 : 0000000000000001 r22 : a000000100076360 r23 : a000000100a7f2f8 r24 : a000000100a7f2b0 r25 : e0000002458c0058 r26 : e000000004e05b10 r27 : 0000000000000001 r28 : 0000000000000000 r29 : a000000100a7f2e0 r30 : a000000100a7f2b0 r31 : e000000245920098 Call Trace: [] show_stack+0x40/0xa0 sp=e0000002458a77d0 bsp=e0000002458a1310 [] show_regs+0x840/0x880 sp=e0000002458a79a0 bsp=e0000002458a12b8 [] die+0x1a0/0x2a0 sp=e0000002458a79a0 bsp=e0000002458a1270 [] die_if_kernel+0x50/0x80 sp=e0000002458a79a0 bsp=e0000002458a1240 [] ia64_fault+0x1180/0x12a0 sp=e0000002458a79a0 bsp=e0000002458a11e0 [] ia64_leave_kernel+0x0/0x270 sp=e0000002458a7bb0 bsp=e0000002458a11e0 [] rb_erase+0x300/0x7e0 sp=e0000002458a7d80 bsp=e0000002458a11a0 [] __dequeue_entity+0x70/0xa0 sp=e0000002458a7d80 bsp=e0000002458a1170 [] set_next_entity+0x40/0xa0 sp=e0000002458a7d80 bsp=e0000002458a1148 [] set_curr_task_fair+0x40/0xa0 sp=e0000002458a7d80 bsp=e0000002458a1128 [] sched_move_task+0x2d0/0x340 sp=e0000002458a7d80 bsp=e0000002458a10e8 [] cpu_cgroup_attach+0x20/0x40 sp=e0000002458a7d90 bsp=e0000002458a10b0 [] attach_task+0x9b0/0xac0 sp=e0000002458a7d90 bsp=e0000002458a1058 [] cgroup_common_file_write+0x340/0x520 sp=e0000002458a7dc0 bsp=e0000002458a1010 [] cgroup_file_write+0xf0/0x300 sp=e0000002458a7dd0 bsp=e0000002458a0fc0 [] vfs_write+0x1d0/0x320 sp=e0000002458a7e20 bsp=e0000002458a0f70 [] sys_write+0x70/0xe0 sp=e0000002458a7e20 bsp=e0000002458a0ef8 [] ia64_ret_from_syscall+0x0/0x20 sp=e0000002458a7e30 bsp=e0000002458a0ef8 [] __kernel_syscall_via_break+0x0/0x20 sp=e0000002458a8000 bsp=e0000002458a0ef8 -- regards, Dhaval