Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752140AbaGUCPu (ORCPT ); Sun, 20 Jul 2014 22:15:50 -0400 Received: from mga02.intel.com ([134.134.136.20]:62169 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751650AbaGUCPs (ORCPT ); Sun, 20 Jul 2014 22:15:48 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,697,1400050800"; d="scan'208";a="576221243" Message-ID: <53CC77D0.8070704@linux.intel.com> Date: Mon, 21 Jul 2014 10:15:44 +0800 From: Jiang Liu Organization: Intel User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Aaron Lu CC: Thomas Gleixner , LKML , lkp@01.org Subject: Re: [x86, irq, ACPI] WARNING: CPU: 13 PID: 11079 at fs/proc/generic.c:521 remove_proc_entry+0x19f/0x1b0() References: <53c5f18d.gIBZ3dUDwRsg/ulf%fengguang.wu@intel.com> <53C5FD6F.6040907@intel.com> <53C61C2C.2050808@linux.intel.com> <53C8CFC7.7080106@intel.com> In-Reply-To: <53C8CFC7.7080106@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thanks for testing, Aaron. On 2014/7/18 15:41, Aaron Lu wrote: > On 07/16/2014 02:31 PM, Jiang Liu wrote: >> 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. > > Yes, the patch makes the warning gone. > > Regards, > Aaron > >> -------------------------------------------------------- >> 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 co ns > >> 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] [] dump_stack+0x4d/0x66 >>> [ 337.976153] [] warn_slowpath_common+0x7d/0xa0 >>> [ 337.982867] [] warn_slowpath_fmt+0x4c/0x50 >>> [ 337.989303] [] remove_proc_entry+0x19f/0x1b0 >>> [ 337.995931] [] unregister_irq_proc+0xbf/0xd0 >>> [ 338.002558] [] free_desc+0x31/0x90 >>> [ 338.008212] [] irq_free_descs+0x3c/0x80 >>> [ 338.014354] [] irq_dispose_mapping+0x36/0x50 >>> [ 338.020983] [] mp_unmap_irq+0x81/0xb0 >>> [ 338.026932] [] acpi_unregister_gsi_ioapic+0x31/0x40 >>> [ 338.034239] [] acpi_unregister_gsi+0x17/0x20 >>> [ 338.040869] [] acpi_pci_irq_disable+0x8f/0x98 >>> [ 338.047594] [] pcibios_disable_device+0x20/0x30 >>> [ 338.054517] [] do_pci_disable_device+0x52/0x60 >>> [ 338.061338] [] pci_disable_device+0x48/0xb0 >>> [ 338.067870] [] usb_hcd_pci_shutdown+0x3f/0x50 >>> [ 338.074593] [] pci_device_shutdown+0x36/0x70 >>> [ 338.081222] [] device_shutdown+0xc8/0x180 >>> [ 338.087558] [] kernel_restart_prepare+0x36/0x40 >>> [ 338.094479] [] kernel_kexec+0x15f/0x180 >>> [ 338.100620] [] SYSC_reboot+0x215/0x240 >>> [ 338.106667] [] ? dentry_free+0x34/0x40 >>> [ 338.112710] [] ? __dentry_kill+0x153/0x1e0 >>> [ 338.119146] [] ? dput+0xa5/0x180 >>> [ 338.124608] [] ? mntput+0x24/0x40 >>> [ 338.130168] [] ? __fput+0x1a3/0x230 >>> [ 338.135922] [] ? task_work_run+0xcc/0xe0 >>> [ 338.142164] [] ? do_notify_resume+0x97/0xb0 >>> [ 338.148696] [] SyS_reboot+0xe/0x10 >>> [ 338.154353] [] 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 >>> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/