Re: Will xfs_growfs succeed on a full file system?

["Geir A. Myrestrand" <geir.myrestrand@falconstor.com>]

David Chinner wrote:
> On Tue, Jan 23, 2007 at 10:19:27AM -0500, Geir A. Myrestrand wrote:
>> Does xfs_growfs depend on some space left on the file system in order to 
>> be able to grow it?
> 
> Yes, it does require some space to be left because growing the
> filesystem can require extending the original last AG to the full
> size and that means there may be btree work to be journalled
> and hence we have to reserve blocks for that to succeed in all
> cases.
> 
>> I have a colleague who ran into an issue where a file system resize 
>> failed. The file system is 100% full.
> 
> Yup, we hit that in QA recently and have an open bug for it.
> 
>> Aside from analyzing what happened in his case, should XFS be able to 
>> grow a file system that is 100% full?
> 
> Yes, it should.
> 
>> The device has already been expanded, it is the XFS file system that 
>> fails to resize. I just wonder if that is by design, or whether it is an 
>> issue.
> 
> It's a bug, really, but one you can easily work around by freeing
> up about 50k of space. If you've got a really large filesystem, then
> you might need to free more space than that.
> 
> At some point in my copious amounts of free time I'll fix it properly...

Thanks a lot for your feedback David. We look forward to a fix, but just 
knowing that it is an issue and that we easily can work around it helps 
a lot. Thanks again!


-- 

Geir A. Myrestrand