On Tue, Feb 19, 2008 at 03:22:39PM +0100, Ingo Molnar wrote: > > * Dhaval Giani <[EMAIL PROTECTED]> wrote: > > > Hi, > > > > I've been running ftrace on the sched-devel tree. I just built a > > kernel and tried rebooting using kexec and I get this, > > hm, it's not a good idea to keep using the data structures of the tracer > while we kexec. Does the patch below resolve the problem? >
It boots, but I get this now [ 0.296073] ------------[ cut here ]------------ [ 0.300018] WARNING: at kernel/lockdep.c:2689 check_flags+0xf6/0x10b() [ 0.300018] Modules linked in: [ 0.300018] Pid: 1, comm: swapper Not tainted 2.6.25-rc2-sched-devel #8 [ 0.300018] [<c012089c>] warn_on_slowpath+0x46/0x60 [ 0.300018] [<c0138ca7>] ? very_verbose+0x8/0xc [ 0.300018] [<c0139a7e>] ? check_chain_key+0xe/0x1a3 [ 0.300018] [<c0138ca7>] ? very_verbose+0x8/0xc [ 0.300018] [<c0138ca7>] ? very_verbose+0x8/0xc [ 0.300018] [<c0139a7e>] ? check_chain_key+0xe/0x1a3 [ 0.300018] [<c0104800>] ? mcount_call+0x5/0x9 [ 0.300018] [<c0139a7e>] ? check_chain_key+0xe/0x1a3 [ 0.300019] [<c013b2f5>] ? __lock_acquire+0x614/0x668 [ 0.300019] [<c0139a7e>] ? check_chain_key+0xe/0x1a3 [ 0.300019] [<c01541c6>] ? ftrace_record_ip+0x124/0x130 [ 0.300019] [<c0104800>] ? mcount_call+0x5/0x9 [ 0.300019] [<c0242f58>] ? debug_locks_off+0x8/0x40 [ 0.300019] [<c0104800>] ? mcount_call+0x5/0x9 [ 0.300019] [<c013b78c>] check_flags+0xf6/0x10b [ 0.300019] [<c013b7d5>] lock_acquire+0x34/0x80 [ 0.300019] [<c040e2eb>] _spin_lock_irqsave+0x27/0x37 [ 0.300019] [<c015414e>] ? ftrace_record_ip+0xac/0x130 [ 0.300019] [<c0124dc4>] ? do_softirq+0x2f/0x47 [ 0.300019] [<c015414e>] ftrace_record_ip+0xac/0x130 [ 0.300019] [<c013a581>] ? trace_softirqs_off+0x8/0xaa [ 0.300019] [<c0124dc4>] ? do_softirq+0x2f/0x47 [ 0.300019] [<c0104800>] mcount_call+0x5/0x9 [ 0.300019] [<c0124dc4>] ? do_softirq+0x2f/0x47 [ 0.300019] [<c013a581>] ? trace_softirqs_off+0x8/0xaa [ 0.300019] [<c01249b1>] __local_bh_disable+0x7d/0x83 [ 0.300019] [<c0124d1c>] __do_softirq+0x1e/0x97 [ 0.300019] [<c0124dc4>] do_softirq+0x2f/0x47 [ 0.300019] [<c0124e3b>] irq_exit+0x3c/0x3e [ 0.300019] [<c011087b>] smp_apic_timer_interrupt+0x32/0x3b [ 0.300019] [<c0105375>] apic_timer_interrupt+0x2d/0x34 [ 0.300019] [<c012153a>] ? release_console_sem+0xc0/0xda [ 0.300019] [<c0120000>] ? sys_unshare+0x9c/0x2a8 [ 0.300019] [<c01211ee>] ? vprintk+0x24b/0x256 [ 0.300019] [<c013a455>] ? trace_hardirqs_on+0xb/0xd [ 0.300019] [<c01541c6>] ? ftrace_record_ip+0x124/0x130 [ 0.300019] [<c0120f95>] ? printk+0x8/0x16 [ 0.300019] [<c0120fa1>] printk+0x14/0x16 [ 0.300019] [<c03a7b85>] sock_register+0x61/0x6a [ 0.300019] [<c05daefd>] netlink_proto_init+0xf4/0x11a [ 0.300019] [<c05bca6c>] ? kernel_init+0x0/0x6c [ 0.300019] [<c05bc8fb>] do_initcalls+0x7a/0x192 [ 0.300019] [<c01a7627>] ? create_proc_entry+0x6c/0x80 [ 0.300019] [<c0104800>] ? mcount_call+0x5/0x9 [ 0.300019] [<c01511b0>] ? register_irq_proc+0xe/0x8b [ 0.300019] [<c01a0000>] ? load_elf_binary+0x818/0x9e0 [ 0.300019] [<c05bca6c>] ? kernel_init+0x0/0x6c [ 0.300019] [<c05bca34>] do_basic_setup+0x21/0x23 [ 0.300019] [<c05bca9d>] kernel_init+0x31/0x6c [ 0.300019] [<c01054cf>] kernel_thread_helper+0x7/0x10 [ 0.300019] ======================= [ 0.300019] ---[ end trace ca143223eefdc828 ]--- [ 0.300019] irq event stamp: 1894 [ 0.300019] hardirqs last enabled at (1893): [<c013a455>] trace_hardirqs_on+0xb/0xd [ 0.300019] hardirqs last disabled at (1894): [<c013a4e6>] trace_hardirqs_off+0xb/0xd [ 0.300019] softirqs last enabled at (1184): [<c0124d90>] __do_softirq+0x92/0x97 [ 0.300019] softirqs last disabled at (1175): [<c0124dc4>] do_softirq+0x2f/0x47 -- regards, Dhaval -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
