On Thursday 13 August 2009, Jiri Slaby wrote: > Hi, Hi, > with current mmotm I get this while trying to hibernate from a system in > qemu: Does it trigger with the "core" test: # echo core > /sys/power/pm_test # echo disk > /sys/power/state > PM: Syncing filesystems ... done. > Freezing user space processes ... (elapsed 0.00 seconds) done. > Freezing remaining freezable tasks ... (elapsed 0.03 seconds) done. > PM: Preallocating image memory... done (allocated 7986 pages) > PM: Allocated 31944 kbytes in 0.01 seconds (3194.40 MB/s) > ACPI: Preparing to enter system sleep state S4 > PM: Saving platform NVS memory > Disabling non-boot CPUs ... > Cannot set affinity for irq 0 > CPU 1 is now offline > SMP alternatives: switching to UP code > CPU1 is down > PM: Creating hibernation image: > PM: Need to copy 7687 pages > PM: Hibernation image created (7687 pages copied) > Enabling non-boot CPUs ... > SMP alternatives: switching to SMP code > Booting processor 1 APIC 0x1 ip 0x6000 > Initializing CPU#1 > Calibrating delay using timer specific routine.. 5985.37 BogoMIPS > (lpj=11970749) > CPU: L1 I cache: 32K, L1 D cache: 32K > CPU: L2 cache: 2048K > mce: CPU supports 32 MCE banks > CPU1: Intel QEMU Virtual CPU version 0.10.50 stepping 03 > checking TSC synchronization [CPU#0 -> CPU#1]: passed. > Switched to high resolution mode on CPU 1 > CPU1 is up > ACPI: Waking up from system sleep state S4 > irq 9: nobody cared (try booting with the "irqpoll" option) > Pid: 497, comm: sh Tainted: G W 2.6.31-rc5-mm1_64 #668 > Call Trace: > <IRQ> [<ffffffff810815c6>] __report_bad_irq+0x26/0xa0 > [<ffffffff810817d0>] note_interrupt+0x190/0x1d0 > [<ffffffff81197e49>] ? acpi_irq+0x11/0x2c > [<ffffffff81081e17>] handle_fasteoi_irq+0xb7/0xe0 > [<ffffffff8100e80d>] handle_irq+0x1d/0x30 > [<ffffffff8100dd37>] do_IRQ+0x67/0xe0 > [<ffffffff8100c813>] ret_from_intr+0x0/0xa > [<ffffffff8104543f>] ? __do_softirq+0x5f/0x130 > [<ffffffff8102449d>] ? ack_apic_level+0x7d/0x1e0 > [<ffffffff8100cf9c>] ? call_softirq+0x1c/0x30 > [<ffffffff8100e7bd>] ? do_softirq+0x4d/0x80 > [<ffffffff8104520d>] ? irq_exit+0x7d/0x90 > [<ffffffff8100dd40>] ? do_IRQ+0x70/0xe0 > [<ffffffff8100c813>] ? ret_from_intr+0x0/0xa > <EOI> [<ffffffff81429c08>] ? _spin_unlock_irqrestore+0x8/0x10 > [<ffffffff810830a3>] ? resume_device_irqs+0x73/0x90 > [<ffffffff8123fb31>] ? dpm_resume_noirq+0xb1/0xc0 > [<ffffffff8106edaa>] ? hibernation_snapshot+0x12a/0x230 > [<ffffffff8106ef84>] ? hibernate+0xd4/0x1a0 > [<ffffffff8106d88c>] ? state_store+0xec/0x100 > [<ffffffff81168987>] ? kobj_attr_store+0x17/0x20 > [<ffffffff81119190>] ? sysfs_write_file+0xe0/0x160 > [<ffffffff810c1648>] ? vfs_write+0xb8/0x1a0 > [<ffffffff8142c5a5>] ? do_page_fault+0x185/0x350 > [<ffffffff810c1f4c>] ? sys_write+0x4c/0x80 > [<ffffffff810cf1c0>] ? sys_fcntl+0x150/0x410 > [<ffffffff8100beeb>] ? system_call_fastpath+0x16/0x1b > handlers: > [<ffffffff81197e38>] (acpi_irq+0x0/0x2c) > Disabling IRQ #9 > > I use this hunk to prevent bh enablement btw.: > diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c > index c1f64e6..bc5368d 100644 > --- a/kernel/hw_breakpoint.c > +++ b/kernel/hw_breakpoint.c > @@ -80,17 +80,15 @@ void load_debug_registers(void) > unsigned long flags; > struct task_struct *tsk = current; > > - spin_lock_bh(&hw_breakpoint_lock); > + spin_lock_irqsave(&hw_breakpoint_lock, flags); > > /* Prevent IPIs for new kernel breakpoint updates */ > - local_irq_save(flags); > arch_update_kernel_hw_breakpoint(NULL); > - local_irq_restore(flags); > > if (test_tsk_thread_flag(tsk, TIF_DEBUG)) > arch_install_thread_hw_breakpoint(tsk); > > - spin_unlock_bh(&hw_breakpoint_lock); > + spin_unlock_irqrestore(&hw_breakpoint_lock, flags); > } > > /* Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
