svn commit: r218347 - stable/8/sys/dev/ata/chipsets

Alexander Motin mav at
Sun Mar 20 14:19:47 UTC 2011

Bob Willcox wrote:
> On Thu, Mar 17, 2011 at 01:41:30AM +0200, Alexander Motin wrote:
>> On 16.03.2011 15:51, Bob Willcox wrote:
>>> This change has broken SATA disk support on my Intel Atom D525 ITX system. By
>>> reverting this change 8.2-STABLE works again on this system.
>>> My 'uname -a' output is:
>>> FreeBSD 8.2-STABLE FreeBSD 8.2-STABLE #6: Wed Mar 16 08:15:43 CDT 2011     bob at  amd64
>>> When booting the system I get tons of these messages:
>>> Mar 16 07:38:19 maul kernel: ad4: WARNING - SETFEATURES ENABLE RCACHE requeued due to channel reset
>>> Mar 16 07:38:19 maul kernel: ad4: interrupt on idle channel ignored
>> As I can see, it means that channel has some active request, but it is 
>> in IDLE state. It is strange, but I won't be surprised much if it is the 
>> result of some locking problem in ata(4) in non-CAM mode.
>>> repeated over and over, and then lots of these:
>>> Mar 16 07:38:21 maul kernel: ad4: WARNING - READ_DMA48 requeued due to channel reset LBA=617964479
>>> Mar 16 07:38:21 maul kernel: ata2: FAILURE - already active DMA on this device
>>> Mar 16 07:38:21 maul kernel: ata2: setting up DMA failed
>>> for different LBA values.
>>> As one might expect, I then start seeing I/O errors on the disk and programs
>>> failing
>>> I've attached the 'pciconf -lv' output.
>> Send me please full verbose log, if you can save it. I am especially 
>> interested in place around first errors.
>> You may try to build kernel with `options ATA_CAM` to see if it helps. 
>> I've mostly tested this patch in that mode.
> I tried setting `options ATA_CAM` but that didn't fix the problem. I still got
> continuous ATA error messages spewed out while probing the ATA devices. I'm
> not able to capture the verbose output as the system never successfully boots
> and I don't have a serial console attached to the system.

It's strange. Can you at least show errors you received in that case? I
suppose they should be different from the original.

> For now, I plan to stay with the previous version of ata-intel.c since this is
> my gateway system and I need for it to 'just work'.  :(

Alexander Motin

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