[PATCH] Fix for 3ware driver

[Jason Thomson]

Well,  it didn't fix my problem.

I'm guessing that the problem I have might possibly be something to do
with bad hardware.  (We have about 10 similarly configured boxes and
this is the only one we're having problems with - although the workload
is not the same on any two boxes).

I'm going to start replacing hardware until the problem goes away. 
(Fingers crossed).

Jason Thomson wrote:

> 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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> 
>