RE: [PATCH V2 RESEND] fsl-sata: I/O load balancing

On Fri, 2012-02-17 at 01:54 +0000, Liu Qiang-B32616 wrote:

The default will be set in a common interface fsl_sata_set_irq_coalescing when
initialize the controller. This interface will check the range of intr count
and ticks and make sure the values are reasonably.

Allright, but the current defaults are basically no coalescing right ?

It's hard to find a aggressive value to adapt all scenarios, so I use echo to adjust
the value. I remember P5020 have some performance issue, I will check it.
BTW, which filesystem do you use? Ext2 is lower than ext4 because metadata is 
continuously wrote to disk. You can try ext4 or xfs. 

ext3 at the moment, I plan to switch to ext4 when I finish that fsck
pass which is taking hours... I am not aware of the 5020 performance
issues, is this something documented and/or fixable ?

Cheers,
Ben.