Re: How to analyze ld at sd mmc on i386 current

[Ryo ONODERA <ryo_on%yk.rim.or.jp@localhost>]

Hi,

From: "Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>, Date: Thu, 2 
Aug 2012 14:44:27 -0500

> On Fri, Aug 03, 2012 at 04:32:32AM +0900, Ryo ONODERA wrote:
>> Hi,
>> 
>> I want to analyze my PR kern/46749,
>> so I am using FFSv2 32GB SDHC card as ld0e at sdmmc.
>> 
>> I suspect functionality of writing to ld at sdmmc is broken,
>> because newfs generates "cg 0: bad magic number" and
>> writing to ld at sdmmc causes panic sometime with some SDHC cards.
>> 
>> Also mounting my FAT 16GB micro SDHC card (formatted on Android
>> phone) with mount_msdos causes freeze.
>> 
>> How to start analyzing?
>> What kind of information will help debugging?
>> Is this problem related to userland command?
>> 
>> Thank you.
>> sdhc0 at pci3 dev 3 function 1: vendor 0x1180 product 0x0822 (rev. 0x13)
>> sdhc0: interrupting at ioapic0 pin 17
>> sdhc0: SD Host Specification 1.0, rev.2
>> sdhc0: using DMA transfer
>> 
> 
> I have a 0x0822 too. I know for a fact that something isn't working
> quite right with the DMA code and/or hardware on some data alignments.

Thanks for your reply, and sorry for late my reply.

> I'll see if I can come up with something.  In the meantime you could
> probably get by with disabling the DMA force-enable.

I have no idea about disabling force-enabled DMA.
I will see the source later.

Thank you.

--
Ryo ONODERA // ryo_on%yk.rim.or.jp@localhost
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