Am 26.06.2012 00:11, schrieb Sage Weil:
On Sat, 23 Jun 2012, Stefan Priebe wrote:
Hi,
i got stuck while selecting the right FS for ceph / RBD.
XFS:
- deadlock / hung task under 3.0.34 in xfs_ilock / xfs_buf_lock while syncfs
There was an ilock fix that went into 3.4, IIRC. Have you tried vanilla
3.4? We are seeing some lockdep noise currently, but no deadlocks yet.
Will test 3.4.4 soon.
- under 3.5-rc3 all my machines got loaded doing nothing than waiting for XFS
/ SSDs so ceph is really slow / unuseable
btrfs:
- 3.5-rc3 ceph is pretty fast and works good until i see also a deadlock while
doing heavy random I/Os in my rbd / kvm.
All processes hang in btrfs_commit_transaction or
btrfs_commit_transaction_async
We haven't seen this yet. See my other reply; a task dump may offer some
clues.
You can find the task dump here:
http://pastebin.com/raw.php?i=R4pztDRt
Stefan
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