Re: [x86, irq, ACPI] WARNING: CPU: 13 PID: 11079 at fs/proc/generic.c:521 remove_proc_entry+0x19f/0x1b0()

From: Jiang Liu
Date: Wed Jul 16 2014 - 02:31:51 EST

Hi Aaron,
Thanks for reporting this issue. Yinghai has already posted
a patch to fix the issue by disabling freeing of irq in case of system
shutdown. Please refer to:
https://lkml.org/lkml/2014/6/26/619

Or could you please help to try following patch, which USB free irq
when shutting down USB controller.
--------------------------------------------------------
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 82044b5d6113..efc953119ce2 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -380,6 +380,8 @@ void usb_hcd_pci_shutdown(struct pci_dev *dev)
if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&
hcd->driver->shutdown) {
hcd->driver->shutdown(hcd);
+ if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)
+ free_irq(hcd->irq, hcd);
pci_disable_device(dev);
}
}
------------------------------------------------------
Regards!
Gerry

On 2014/7/16 12:19, Aaron Lu wrote:
> FYI, we noticed the below changes on
>
> git://internal_merge_and_test_tree devel-athens-arm-201406220544
> commit 6a38fa0e3c94dfd1394a71a2d47c9c4d47367374 ("x86, irq, ACPI: Release IOAPIC pin when PCI device is disabled")
>
> +----------------------------------------------------------+------------+------------+
> | | df334bead7 | 6a38fa0e3c |
> +----------------------------------------------------------+------------+------------+
> | boot_successes | 25 | 10 |
> | early-boot-hang | 1 | |
> | boot_failures | 0 | 8 |
> | WARNING:CPU:PID:at_fs/proc/generic.c:remove_proc_entry() | 0 | 8 |
> | backtrace:SYSC_reboot | 0 | 8 |
> | backtrace:SyS_reboot | 0 | 8 |
> +----------------------------------------------------------+------------+------------+
>
>
> kexecing...
> kexec -l /tmp//kernel/x86_64-rhel/aab037e6194df2251b558935d1ed497678a28a98/vmlinuz-3.16.0-rc5-01780-gaab037e --initrd=/tmp/initrd-10749 --append="user=lkp job=/lkp/scheduled/ivb43/cyclic_netperf-300s-25%-SCTP_STREAM-HEAD-aab037e6194df2251b558935d1ed497678a28a98.yaml ARCH=x86_64 BOOT_IMAGE=/kernel/x86_64-rhel/aab037e6194df2251b558935d1ed497678a28a98/vmlinuz-3.16.0-rc5-01780-gaab037e kconfig=x86_64-rhel commit=aab037e6194df2251b558935d1ed497678a28a98 initrd=/kernel-tests/initrd/lkp-rootfs.cgz root=/dev/ram0 bm_initrd=/lkp/benchmarks/netperf.cgz modules_initrd=/kernel/x86_64-rhel/aab037e6194df2251b558935d1ed497678a28a98/modules.cgz max_uptime=1500 RESULT_ROOT=/result/ivb43/netperf/300s-25%-SCTP_STREAM/x86_64-rhel/aab037e6194df2251b558935d1ed497678a28a98/0 ip=::::ivb43::dhcp oops=panic earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 softlockup_panic=1 nmi_watchdog=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 cons
ole=
> tty0 vga=normal"
> [ 337.887999] remove_proc_entry: removing non-empty directory 'irq/20', leaking at least 'ehci_hcd:usb2'
> [ 337.898418] Modules linked in: sctp ipmi_watchdog dm_mod fuse mgag200 syscopyarea sysfillrect snd_pcm sysimgblt ttm snd_timer ahci drm_kms_helper libahci snd sb_edac soundcore libata drm edac_core i2c_i801 pcspkr wmi ipmi_si ipmi_msghandler
> [ 337.922594] CPU: 37 PID: 11079 Comm: kexec Not tainted 3.16.0-rc5-01780-gaab037e #1
> [ 337.931164] Hardware name: Intel Corporation S2600WP/S2600WP, BIOS SE5C600.86B.02.02.0002.122320131210 12/23/2013
> [ 337.942650] 0000000000000009 ffff880ffd1e3b30 ffffffff8182cb42 ffff880ffd1e3b78
> [ 337.950976] ffff880ffd1e3b68 ffffffff8106d0cd ffff8808108e3a00 0000000000000002
> [ 337.959316] ffff880ffd1e3c3e ffff880801a60ab0 ffff8808108e3a75 ffff880ffd1e3bc8
> [ 337.967653] Call Trace:
> [ 337.970396] [<ffffffff8182cb42>] dump_stack+0x4d/0x66
> [ 337.976153] [<ffffffff8106d0cd>] warn_slowpath_common+0x7d/0xa0
> [ 337.982867] [<ffffffff8106d13c>] warn_slowpath_fmt+0x4c/0x50
> [ 337.989303] [<ffffffff81233ccf>] remove_proc_entry+0x19f/0x1b0
> [ 337.995931] [<ffffffff810d111f>] unregister_irq_proc+0xbf/0xd0
> [ 338.002558] [<ffffffff810cb031>] free_desc+0x31/0x90
> [ 338.008212] [<ffffffff810cb0cc>] irq_free_descs+0x3c/0x80
> [ 338.014354] [<ffffffff810d08b6>] irq_dispose_mapping+0x36/0x50
> [ 338.020983] [<ffffffff8104b741>] mp_unmap_irq+0x81/0xb0
> [ 338.026932] [<ffffffff81041ed1>] acpi_unregister_gsi_ioapic+0x31/0x40
> [ 338.034239] [<ffffffff81041dd7>] acpi_unregister_gsi+0x17/0x20
> [ 338.040869] [<ffffffff814546a5>] acpi_pci_irq_disable+0x8f/0x98
> [ 338.047594] [<ffffffff816dbaa0>] pcibios_disable_device+0x20/0x30
> [ 338.054517] [<ffffffff81411e72>] do_pci_disable_device+0x52/0x60
> [ 338.061338] [<ffffffff81411ec8>] pci_disable_device+0x48/0xb0
> [ 338.067870] [<ffffffff8162004f>] usb_hcd_pci_shutdown+0x3f/0x50
> [ 338.074593] [<ffffffff81413f96>] pci_device_shutdown+0x36/0x70
> [ 338.081222] [<ffffffff814e2a38>] device_shutdown+0xc8/0x180
> [ 338.087558] [<ffffffff810966f6>] kernel_restart_prepare+0x36/0x40
> [ 338.094479] [<ffffffff810f150f>] kernel_kexec+0x15f/0x180
> [ 338.100620] [<ffffffff81096ae5>] SYSC_reboot+0x215/0x240
> [ 338.106667] [<ffffffff811de9a4>] ? dentry_free+0x34/0x40
> [ 338.112710] [<ffffffff811dfa23>] ? __dentry_kill+0x153/0x1e0
> [ 338.119146] [<ffffffff811dfb55>] ? dput+0xa5/0x180
> [ 338.124608] [<ffffffff811e8874>] ? mntput+0x24/0x40
> [ 338.130168] [<ffffffff811cae53>] ? __fput+0x1a3/0x230
> [ 338.135922] [<ffffffff8108d62c>] ? task_work_run+0xcc/0xe0
> [ 338.142164] [<ffffffff81013c27>] ? do_notify_resume+0x97/0xb0
> [ 338.148696] [<ffffffff81096bae>] SyS_reboot+0xe/0x10
> [ 338.154353] [<ffffffff81835969>] system_call_fastpath+0x16/0x1b
> [ 338.161078] ---[ end trace 658129a0d50846f5 ]---
> [ 338.166362] ------------[ cut here ]------------
>
>
>
> Disclaimer:
> Results have been estimated based on internal Intel analysis and are provided
> for informational purposes only. Any difference in system hardware or software
> design or configuration may affect actual performance.
>
> Thanks,
> Aaron
>
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