Re: [PATCH v2] scsi: fix async probe regression

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On Tue, May 29, 2012 at 5:53 PM, walt <w41ter@xxxxxxxxx> wrote:
> On 05/25/2012 10:55 AM, Dan Williams wrote:
>> Commit a7a20d1 "[SCSI] sd: limit the scope of the async probe domain"
>> moved sd probe work out of reach of wait_for_device_probe().  Allow it
>> to be synced via scsi_complete_async_scans().
>
> Hi Dan.  After applying version 2 of a7a20d1 I can boot again, but there's
> a catch :)

Ah you took me off the cc, so I missed this originally.

>
> My grub.cfg boot menu entry uses the root=PARTUUID=<guid> syntax, but that
> has stopped working.  After a7a20d1(v2) I have to use root=/dev/sda5 or I
> get the familiar "can't find block device (foo,bar)" kernel panic.

What is a7a20d1(v2)?  That's the original commit that broke things, so
I'm confused.

> Any idea what would cause that particular kind of breakage?

The fix should be equivalent for both root= options because if the
device can be found by /dev/sda5 I don't see anything related to the
async subsystem that would prevent it from being looked up by uuid??

--
Dan
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