linux-kernel - Re: [PATCH] sd: assign appropriate log level

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Message-ID: <5c5e37b1-0058-c1eb-8a4c-c493c7493fd6@cisco.com>
Date:   Mon, 17 Oct 2016 10:22:55 -0700
From:   Daniel Walker <danielwa@...co.com>
To:     James Bottomley <jejb@...ux.vnet.ibm.com>,
        David Singleton <davsingl@...co.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Shikhar Dogra <shidogra@...co.com>, xe-kernel@...ernal.cisco.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sd: assign appropriate log level

On 10/17/2016 10:19 AM, James Bottomley wrote:
> On Mon, 2016-10-17 at 09:51 -0700, David Singleton wrote:
>> From: Shikhar Dogra <shidogra@...co.com>
>>
>> Reduce chatter on console for usb hotplug.
>> KERN_ERR is too high severity for these messages, moving them
>> to KERN_WARNING
> It's an error because we have several USB to IDE bridges that have
> write back cache drives but report nothing to the caching mode page.
>   For them this is a serious error because their data integrity is at
> risk.  I'm open to other ways to fix your problem, but downgrading the
> message severity because *you* don't have an issue would mask the
> problem for others, so it's not really viable.

Is there a way to detect when you have a device of the type where this 
is a serious issue ? This typically happen for USB drives, but seems to 
have no effect on them.


Daniel