From: Nadav Amit <nadav.amit@gmail.com>
To: iommu@lists.linux-foundation.org,
Adam Morrison <mad@cs.technion.ac.il>,
M G Berberich <berberic@fmi.uni-passau.de>
Cc: USB list <linux-usb@vger.kernel.org>,
linux-mm@kvack.org, Alan Stern <stern@rowland.harvard.edu>
Subject: Re: BUG: using smp_processor_id() in preemptible [00000000] code]
Date: Thu, 9 Jun 2016 12:10:47 -0700 [thread overview]
Message-ID: <50F437E3-85F7-4034-BAAE-B2558173A2EA@gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1606091410580.1353-100000@iolanthe.rowland.org>
Alan Stern <stern@rowland.harvard.edu> wrote:
> On Thu, 9 Jun 2016, M G Berberich wrote:
>
>> Hello,
>>
>> With 4.7-rc2, after detecting a USB Mass Storage device
>>
>> [ 11.589843] usb-storage 4-2:1.0: USB Mass Storage device detected
>>
>> a constant flow of kernel-BUGS is reported (several per second).
>>
>> [ 11.599215] BUG: using smp_processor_id() in preemptible [00000000] code:
>> systemd-udevd/389
>> [ 11.599218] caller is debug_smp_processor_id+0x17/0x20
>> [ 11.599220] CPU: 4 PID: 389 Comm: systemd-udevd Not tainted 4.7.0-rc2 #6
>> [ 11.599220] Hardware name: Gigabyte Technology Co., Ltd. H87-HD3/H87-HD3,
>> BIOS F10 08/18/2015
>> [ 11.599223] 0000000000000000 ffff88080466b6c8 ffffffff813fc42d
>> 0000000000000004
>> [ 11.599224] ffffffff81cc1da3 ffff88080466b6f8 ffffffff8141a0f6
>> 0000000000000000
>> [ 11.599226] ffff880809fe8d98 0000000000000001 00000000000fffff
>> ffff88080466b708
>> [ 11.599226] Call Trace:
>> [ 11.599229] [<ffffffff813fc42d>] dump_stack+0x4f/0x72
>> [ 11.599231] [<ffffffff8141a0f6>] check_preemption_disabled+0xd6/0xe0
>> [ 11.599233] [<ffffffff8141a117>] debug_smp_processor_id+0x17/0x20
>> [ 11.599235] [<ffffffff814f0336>] alloc_iova_fast+0xb6/0x210
>> [ 11.599238] [<ffffffff819ed64f>] ? __wait_on_bit+0x6f/0x90
>> [ 11.599240] [<ffffffff814f388d>] intel_alloc_iova+0x9d/0xd0
>> [ 11.599241] [<ffffffff814f7c33>] __intel_map_single+0x93/0x190
>> [ 11.599242] [<ffffffff814f7d64>] intel_map_page+0x34/0x40
>>
>> Please see https://bugzilla.kernel.org/show_bug.cgi?id=119801 for a
>> more complete kernel-log
>
> This looks like a bug in the memory management subsystem. It should be
> reported on the linux-mm mailing list (CC'ed).
This bug is IOMMU related (mailing list CC’ed) and IIUC already fixed.
Regards,
Nadav
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next prev parent reply other threads:[~2016-06-09 19:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20160609172444.GB6277@invalid>
2016-06-09 18:14 ` Alan Stern
2016-06-09 19:10 ` Nadav Amit [this message]
2016-06-13 13:06 ` M G Berberich
2016-06-13 13:11 ` Adam Morrison
2016-06-14 9:08 ` M G Berberich
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