linux-kernel - Re: [PATCH] irq: remove smp_affinity

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Date:	Thu, 26 May 2011 07:05:23 -0700
From:	Mike Travis <travis@....com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] irq: remove smp_affinity_list when unregister irq proc

Thanks Yinghai!  I (obviously) wasn't aware of this interface. -mike

Yinghai Lu wrote:
> got:
> [  274.239264] ------------[ cut here ]------------
> [  274.239500] WARNING: at fs/proc/generic.c:850 remove_proc_entry+0x24c/0x27a()
> [  274.251761] remove_proc_entry: removing non-empty directory 'irq/184', leaking at least 'smp_affinity_list'
> [  274.271696] Modules linked in:
> [  274.271880] Pid: 1, comm: swapper Tainted: G        W   2.6.39-tip-yh-07723-gf48dc10-dirty #1051
> [  274.291734] Call Trace:
> [  274.291892]  [<ffffffff8107cfa8>] warn_slowpath_common+0x85/0x9d
> [  274.311582]  [<ffffffff8107d063>] warn_slowpath_fmt+0x46/0x48
> [  274.311874]  [<ffffffff8118994e>] remove_proc_entry+0x24c/0x27a
> [  274.331549]  [<ffffffff813336ca>] ? vsnprintf+0x3ed/0x429
> [  274.331798]  [<ffffffff81333746>] ? sprintf+0x40/0x42
> [  274.351430]  [<ffffffff810cde65>] unregister_irq_proc+0xb5/0xd2
> [  274.351715]  [<ffffffff810ca64b>] free_desc+0x22/0x61
> [  274.371461]  [<ffffffff810ca6c5>] irq_free_descs+0x3b/0x73
> [  274.371738]  [<ffffffff81053bb3>] free_irq_at+0x31/0x36
> [  274.391409]  [<ffffffff810553e6>] destroy_irq+0x74/0x7c
> [  274.391662]  [<ffffffff81055619>] native_teardown_msi_irq+0xe/0x10
> [  274.411407]  [<ffffffff8136239c>] default_teardown_msi_irqs+0x57/0x79
> [  274.411735]  [<ffffffff81361c49>] free_msi_irqs+0x84/0xe2
> [  274.431394]  [<ffffffff8136294d>] pci_disable_msi+0x35/0x39
> [  274.431678]  [<ffffffff816574e2>] e1000e_reset_interrupt_capability+0x55/0x63
> [  274.451420]  [<ffffffff81657701>] e1000_test_msi_interrupt+0x30/0x114
> [  274.451749]  [<ffffffff81657853>] e1000_test_msi+0x6e/0xc5
> [  274.471429]  [<ffffffff81658add>] e1000_open+0x10f/0x1e2
> [  274.471731]  [<ffffffff81afed63>] __dev_open+0x9c/0xca
> [  274.491282]  [<ffffffff81afef9d>] __dev_change_flags+0xad/0x130
> [  274.491561]  [<ffffffff81aff0a1>] dev_change_flags+0x21/0x56
> [  274.511370]  [<ffffffff82737d6b>] ic_open_devs+0xe3/0x233
> [  274.511637]  [<ffffffff827394cf>] ip_auto_config+0xa5/0x2c0
> [  274.531432]  [<ffffffff8273942a>] ? root_nfs_parse_addr+0xb5/0xb5
> [  274.531780]  [<ffffffff810002cf>] do_one_initcall+0x57/0x134
> [  274.551599]  [<ffffffff826ecf91>] kernel_init+0x137/0x1bb
> [  274.551884]  [<ffffffff81c2e354>] kernel_thread_helper+0x4/0x10
> [  274.571423]  [<ffffffff81c268c0>] ? retint_restore_args+0xe/0xe
> [  274.591165]  [<ffffffff826ece5a>] ? start_kernel+0x3d3/0x3d3
> [  274.591483]  [<ffffffff81c2e350>] ? gs_change+0xb/0xb
> [  274.611129] ---[ end trace e07c035be3c974e5 ]---
> 
> caused by:
> | commit 4b060420a596095869a6d7849caa798d23839cd1
> | Author: Mike Travis <travis@....com>
> | Date:   Tue May 24 17:13:12 2011 -0700
> |
> |    bitmap, irq: add smp_affinity_list interface to /proc/irq
> 
> it forgets to remove it in exit path
> 
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> 
> ---
>  kernel/irq/proc.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> Index: linux-2.6/kernel/irq/proc.c
> ===================================================================
> --- linux-2.6.orig/kernel/irq/proc.c
> +++ linux-2.6/kernel/irq/proc.c
> @@ -352,6 +352,7 @@ void unregister_irq_proc(unsigned int ir
>  #ifdef CONFIG_SMP
>  	remove_proc_entry("smp_affinity", desc->dir);
>  	remove_proc_entry("affinity_hint", desc->dir);
> +	remove_proc_entry("smp_affinity_list", desc->dir);
>  	remove_proc_entry("node", desc->dir);
>  #endif
>  	remove_proc_entry("spurious", desc->dir);
--
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