Em Thu, Nov 20, 2008 at 11:29:10AM -0200, Arnaldo Carvalho de Melo escreveu: > Em Thu, Nov 20, 2008 at 11:25:44AM -0200, Arnaldo Carvalho de Melo escreveu: > > Em Mon, Nov 10, 2008 at 06:47:40PM -0500, Paul Gortmaker escreveu: > > > I've updated from the 2.6.27-rc8 patch series based on 26rt9 to be > > > based on 2.6.27.5 kernel.org and 26rt11 preempt_rt. > > > > > > I've done a successful boot to X11 on basic old P4 and it survived a > > > make -j20 of kernel.org git. There is still work to be done in order to > > > stabilize more complex hardware (e.g. SMP etc) -- but I see this still > > > > I hit one, DELL PE1900, dual dual core xeon, megasas disk controler, > > bnx2 NIC: > > No AGP bridge found > > PCI-DMA: Using software bounce buffering for IO (SWIOTLB) > > Placing software IO TLB between 0x20000000 - 0x24000000 > > Memory: 4009156k/4980736k available (2784k kernel code, 184412k > > reserved, 1650k data, 496k init) > > Calibrating delay loop (skipped), value calculated using timer > > frequency.. 3989.96 BogoMIPS (lpj=1994981) > > BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 > > IP: [<ffffffff8151d8b8>] fork_init+0xba/0xd2 PGD 0 > > Oops: 0000 [1] PREEMPT SMP > > CPU 0 > > Modules linked in: > > Pid: 0, comm: swapper Not tainted 2.6.27.5-26rt11 #1 > > RIP: 0010:[<ffffffff8151d8b8>] [<ffffffff8151d8b8>] fork_init+0xba/0xd2 > > RSP: 0018:ffffffff814fff08 EFLAGS: 00010206 > > RAX: ffffffff8157caf0 RBX: 0000000000130000 RCX: 0000000000000048 > > RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffffffff815cfc48 > > RBP: ffffffff814fff18 R08: 0000000000000000 R09: 0000000000000000 > > R10: 0000000000000010 R11: 0000000000000002 R12: 4ec4ec4ec4ec4ec5 > > R13: ffffffff81535d80 R14: ffffffff815381c0 R15: 0000000000000000 > > FS: 0000000000000000(0000) GS:ffffffff814eb100(0000) > > knlGS:0000000000000000 > > CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > > CR2: 0000000000000008 CR3: 0000000000201000 CR4: 00000000000006a0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > > Process swapper (pid: 0, threadinfo ffffffff814fe000, task ffffffff814064a0) > > Stack: ffffffff814fff18 0000000000000000 ffffffff814fff58 > > ffffffff81506cf6 > > ffffffff814fff58 ffffffff815381c0 0000000000854520 ffffffff81506140 > > 0000000000093390 0000000000000000 ffffffff814fff78 ffffffff815062a3 > > Call Trace: > > [<ffffffff81506cf6>] start_kernel+0x34c/0x3d1 > > [<ffffffff81506140>] ? early_idt_handler+0x0/0x72 > > [<ffffffff815062a3>] x86_64_start_reservations+0xa9/0xad > > [<ffffffff815063c5>] x86_64_start_kernel+0xfb/0x106 > > > > > > Code: 48 89 90 e0 02 00 00 48 8b 90 98 02 00 00 48 89 90 e8 02 00 00 48 > > 8b 15 9f da fc ff 48 c7 c0 f0 ca 57 81 48 8b 14 0a 48 83 c1 08 <48> 03 > > 42 08 48 81 f9 00 02 00 00 48 89 00 48 89 40 08 75 d6 5b > > RIP [<ffffffff8151d8b8>] fork_init+0xba/0xd2 > > RSP <ffffffff814fff08> > > CR2: 0000000000000008 > > ---[ end trace 4eaa2a86a8e2da22 ]--- > > Kernel panic - not syncing: Attempted to kill the idle task! > > Pid: 0, comm: swapper Tainted: G D 2.6.27.5-26rt11 #1 > > > > Call Trace: > > [<ffffffff8103c1fb>] panic+0xaf/0x167 > > [<ffffffff811a25c4>] ? account+0xd8/0xe7 > > [<ffffffff8100c95a>] ? retint_restore_args+0x13/0x20 > > [<ffffffff81054606>] ? blocking_notifier_call_chain+0xf/0x11 > > [<ffffffff8103f28d>] do_exit+0x78/0x88e > > [<ffffffff811a2775>] ? get_random_bytes+0x1b/0x1d > > [<ffffffff812b1a8d>] oops_begin+0x0/0x7c > > [<ffffffff812b3f98>] do_page_fault+0x9e5/0xaa8 (gdb) l *0xffffffff8151d8b8 0xffffffff8151d8b8 is in fork_init (/home/acme/git/paulg-rt-linux-2.6/kernel/fork.c:233). 228 init_task.signal->rlim[RLIMIT_NPROC].rlim_max = max_threads/2; 229 init_task.signal->rlim[RLIMIT_SIGPENDING] = 230 init_task.signal->rlim[RLIMIT_NPROC]; 231 232 for (i = 0; i < NR_CPUS; i++) 233 INIT_LIST_HEAD(&per_cpu(delayed_drop_list, i)); 234 } 235 236 int __attribute__((weak)) arch_dup_task_struct(struct task_struct *dst, 237 struct task_struct *src) (gdb) Here: 232 for (i = 0; i < NR_CPUS; i++) 233 INIT_LIST_HEAD(&per_cpu(delayed_drop_list, i)); static DEFINE_PER_CPU(struct list_head, delayed_drop_list); This comes from patch preempt-realtime-mmdrop-delayed.patch, that is dbcb144fbb8adca0a98c4812e08da4e27e2bfadb in your tree. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
