Re: Debugging new HW XOR engine driver

[tirumalareddy marri <tirumalareddymarri@yahoo.com>]

I am working AMCC powerPC based SoC. It has XOR engine built in the HW.  
Thanks,
Marri

----- Original Message ----
From: "thomas62186218@aol.com" <thomas62186218@aol.com>
To: tirumalareddymarri@yahoo.com; linux-raid@vger.kernel.org
Sent: Tuesday, July 15, 2008 9:35:15 AM
Subject: Re: Debugging new HW XOR engine driver

Regarding your HW XOR driver, is this for Intel x86 or some other 
platform. I am assuming x86 since you did not mention another other 
processor platform but in that case, what hardware are you using for 
XOR?

-Thomas


-----Original Message-----
From: tirumalareddy marri <tirumalareddymarri@yahoo.com>
To: linux-raid@vger.kernel.org
Sent: Mon, 14 Jul 2008 11:26 am
Subject: Debugging new HW  XOR engine driver










I am new to this mailing list. I am working on adding driver for HW 
accelerated
XOR engine. I am able to get XOR engine working and created ADMA 
interface . I
am able to create RAID-5 using mdadm. After creating filesystem, I 
tried to
mount the /dev/md0 . It failied to mount saying that 
"ext3_check_descriptors:
Block bitmap for group 384 not in group" . For sure there is some thing 
wrong at
driver level.
  I used "dd" command to read/write to /dev/md0. It seems read/writes 
are not a
problem. When I do small file sizes of 10K , everything fine. When I 
write a
file of size of 1MB or above seems to have issue. Looks like partial 
write fine
too.
  I am looking for the ways to debug the problem. Also looking for 
suggestions
from the people who developed HW accelerated drivers and the issue thy 
run into.
Are the some tools to identify the corruptions.
Thanks in Advance.
--Tirumala

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