BTRFS on LVM causes long fedora-storage-init run?

Josef Bacik josef at
Fri Oct 7 16:56:06 UTC 2011

On Fri, Oct 7, 2011 at 12:40 PM, Tomasz Torcz <tomek at> wrote:
> On Fri, Oct 07, 2011 at 11:29:45AM -0500, Michael Cronenworth wrote:
>> Richard Shaw wrote:
>> > I rebooted a few times just to make sure it's not a scheduled fsck
>> > (not that there is a full fsck for BTRFS yet) and the hard drive light
>> > is on pretty solid the whole time...
>> The fsck tool does nothing and will not be the cause of your delay. If
>> your fs gets even one bit corrupted you'll lose everything (just FYI).
>> I've had long mount times on a btrfs drive (no LVM) for a while now. I'm
>> seeing mount take about 7 seconds to complete. I posted this delay to
>> the btrfs list and my message didn't receive a single reply.
>  Do you have caches enabled and fully built?  Remounting with
> "-o space_cache,inode_cache" will enable them.  Then wait few minutes
> for caches to be built (I/O will stop when they're ready).  Subsequent
> mounts should be faster.

What Tomasz said, and if that doesn't help use bootchart and upload
the chart somewhere so I can see what's going on.  Thanks,


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