[libvirt] [PATCH] storage: Fix any VolLookupByPath if we have an empty logical pool

[Cole Robinson]

On 01/25/2012 01:23 PM, Eric Blake wrote:
> On 01/25/2012 11:15 AM, Cole Robinson wrote:
>> On F16 at least, empty volume groups don't have a directory under /dev.
>> The directory only appears once a logical volume is created.
>>
>> This tickles some behavior in BackendStablePath which ends with
>> libvirt sleeping for 5 seconds while waiting for the directory to appear.
>> This causes all sorts of problems for the virStorageVolLookupByPath API
>> which virtinst uses, even if trying to resolve a path that is independent
>> of the logical pool.
>>
>> In reality we don't even need to do that checking since logical pools
>> always have a stable target path. Short circuit the polling in that
>> case.
>>
>> Fixes bug 782261
>> ---
>>  src/storage/storage_backend.c |    4 ++++
>>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> ACK.  Isn't it funny how small a patch can be in proportion to the time
> it took you to analyze why that one if statement is needed?
> 

:)  Thanks Eric, pushed now.

- Cole