linux-kernel - Re: WARN @lib/refcount.c:128 during hot unplug of I/O adapter.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <D5BDC786-03CF-423C-AFD6-2F8679F465C8@linux.vnet.ibm.com>
Date:   Fri, 7 Apr 2017 10:08:23 +0530
From:   Sachin Sant <sachinp@...ux.vnet.ibm.com>
To:     Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>
Cc:     linuxppc-dev@...abs.org,
        "nfont >> Nathan Fontenot" <nfont@...ux.vnet.ibm.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: WARN @lib/refcount.c:128 during hot unplug of I/O adapter.


> On 07-Apr-2017, at 2:14 AM, Tyrel Datwyler <tyreld@...ux.vnet.ibm.com> wrote:
> 
> 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
> 
> 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)?
> 

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

> -Tyrel
> 
>> 
>> Thanks
>> -Sachin
>> 
>> 
>