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Subject: Re: WARN @lib/refcount.c:128 during hot unplug of I/O adapter.
From: Sachin Sant <sachinp@linux.vnet.ibm.com>
In-Reply-To: <a7a782f2-3783-fd96-eda9-1c7634b2a2e5@linux.vnet.ibm.com>
Date: Fri, 7 Apr 2017 10:08:23 +0530
Cc: linuxppc-dev@ozlabs.org,
 "nfont >> Nathan Fontenot" <nfont@linux.vnet.ibm.com>,
 LKML <linux-kernel@vger.kernel.org>
References: <E5B3D5CE-EB6A-4470-B7E9-4F6F7B029809@linux.vnet.ibm.com>
 <a7a782f2-3783-fd96-eda9-1c7634b2a2e5@linux.vnet.ibm.com>
To: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Message-Id: <D5BDC786-03CF-423C-AFD6-2F8679F465C8@linux.vnet.ibm.com>
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> On 07-Apr-2017, at 2:14 AM, Tyrel Datwyler <tyreld@linux.vnet.ibm.com> =
wrote:
>=20
> On 04/06/2017 03:27 AM, Sachin Sant wrote:
>> On a POWER8 LPAR running 4.11.0-rc5, a hot unplug operation on
>> any I/O adapter results in the following warning
>=20
> I remember you mentioning this when the issue was brought up for CPUs. =
I
> assume the case is the same here where the issue is only seen with
> adapters that were hot-added after boot (ie. hot-remove of adapter
> present at boot doesn't trip the warning)?
>=20

Correct, can be recreated only with adapters that were hot-added after =
boot.

> -Tyrel
>=20
>>=20
>> Thanks
>> -Sachin
>>=20
>>=20
>=20