On Wed, Jul 25, 2018 at 5:41 PM Alex Gorbachev <ag@xxxxxxxxxxxxxxxxxxx> wrote:
I am not sure this related to RBD, but in case it is, this would be an
important bug to fix.
Running LVM on top of RBD, XFS filesystem on top of that, consumed in RHEL 7.4.
When running a large read operation and doing LVM snapshots during
that operation, the block being read winds up all zeroes in pagecache.
Dropping the caches syncs up the block with what's on "disk" and
everything is fine.
Working on steps to reproduce simply - ceph is Luminous 12.2.7, RHEL
client is Jewel 10.2.10-17.el7cp
Is this krbd or QEMU+librbd? If the former, what kernel version are you running?
--
Alex Gorbachev
Storcium
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Jason
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