[PATCH] Fix for 3ware driver

[Jason Thomson]

Sorry to reply to my own message (should have checked first).  I've just
looked at the code,  and from a cursory glance,  it seems that the code
that has been changed is the same in the old driver and the new driver.

As I recall from a previous investigation in December,  the differences
between the two versions were small,  anyway.  The new (3ware approved)
driver looked like a tidier version of the old one.

So I guess it's likely that the problem did exist before.  I'll cvsup 
and apply the patch.





Jason Thomson wrote:

> Is it possible that this problem is also exhibited by a 4.9-STABLE 
> Kernel from January 22nd?  i.e. might this same (or a similar) problem 
> have existed in the previous driver?
> 
> I am seeing i/o hangs (swap_pager: indefinite wait buffer messages) on 
> one of our boxes here.  (4 x Maxtor 300GB drives / 3ware 7506-4 / 2.4GHz 
> Xeon Dell 1600SC).
> 
> The machine is a backup server running BackupPC - it does experience 
> heavy load and i/o stress.
> 
> 
> Scott Long wrote:
> 
>> Mike Tancsa wrote:
>>
>>>
>>> What cards has this shown up with and what versions of the BIOS ?  I 
>>> have quite a few 3ware boxes deployed and have not seen any 
>>> problems.  When was the bug introduced ?
> 
> 
>>
>> The bugs were introduced into 4.x with the vendor update that happened
>> on April 7.  So far the only cards that we have tested against have been
>> 6xxx series cards.  The bugs deal with resource shortage handling, so
>> it's likely that the slower 6xxx cards are more likely than the newer
>> cards to experience the problems.  However, on a fast machine under
>> heavy I/O load, I would expect it to happen on any card.
>>
>> Scott
> 
> 
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