[lkml]   [2001]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.4.9-ac10 IDE access slows as uptime increases
* Alan Cox ( wrote:
> Second question is what is in your IDE logs. The IDE layer will change
> down speeds when it hits a repeated problem (eg a DMA timeout) so if
> need be will switch back to PIO or to MWDMA.

I have what sounds like a similar problem - assuming it is a problem
with the IDE layer dropping the speed - except mine is with my CD or
DVD drive. They run a lot slower under the 2.4.x kernels than under
2.2.19 (looking at 2-3megs/s under 2.4.x, 5-7megs/s under 2.2.19).

Also when using 2.4.x, the kernel has a habit of disabling DMA and
performance plummets. Yet it is fine with 2.2.19.

Is this a related issue? Is there a fix for this?

Steve Maughan
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:03    [W:0.051 / U:2.004 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site