Subject: Re: LFS writes and network receive (too much splhigh?)
To: None <firstname.lastname@example.org>
From: Jason Thorpe <email@example.com>
Date: 10/22/2006 12:33:28
On Oct 22, 2006, at 12:07 PM, Thor Lancelot Simon wrote:
> How can we fix this? The smooth syncer issue is really separate: it
> makes it easier to demonstrate the problem.
> Could LFS use more locks so that it spent less time at high IPL? Or
> this really a problem in my disk device driver (amr)? I have heard
> similar reports from other LFS users with different disk hardware.
Why would LFS be at splhigh()? Have you confirmed that in the code
paths in question?
More likely, I think, is that your network interface and your RAID
controller are sharing an IRQ, or that the RAID controller is
consuming a lot of PCI bandwidth during these bursts of activity.
Let's see dmesg output.