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

Richard Shaw hobbes1069 at
Fri Oct 7 18:00:19 UTC 2011

On Fri, Oct 7, 2011 at 11:56 AM, Josef Bacik <josef at> wrote:
> 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,

I'll give it a try. It's my laptop so I don't keep anything I care
about on it. It's also my work laptop (dual boots XP which I'm using
now). I may sneak in a reboot at work to make the chart, otherwise it
will be tonight.


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