Re: Bug 205201 - Booting halts if Dawicontrol DC-2976 UW SCSI board installed, unless RAM size limited to 3500M

From: Christian Zigotzky
Date: Thu Nov 21 2019 - 07:18:30 EST

On 21 November 2019 at 08:29 am, Christoph Hellwig wrote:
On Sat, Nov 16, 2019 at 08:06:05AM +0100, Christian Zigotzky wrote:
* DMA addressing mode.
* 0 : 32 bit addressing for all chips.
* 1 : 40 bit addressing when supported by chip.
* 2 : 64 bit addressing when supported by chip,
* limited to 16 segments of 4 GB -> 64 GB max.

Cyrus config:


I will configure â0 : 32 bit addressing for all chipsâ for the RC8. Maybe this is the solution.
0 means you are going to do bounce buffering a lot, which seems
generally like a bad idea.

But why are we talking about the sym53c8xx driver now? The last issue
you reported was about video4linux allocations.

Both drivers have the same problem. They don't work if we have more than 3.5GB RAM. I try to find a solution until your have a good solution. I have already a solution for V4L but I still need one for the sym53c8xx driver.