ceph/qa/suites/rbd/pwl-cache/tmpfs/.qa
Ilya Dryomov 23759e0034 qa/suites/rbd: place cache file on tmpfs for xfstests
The RWL mode needs DAX and is dog slow otherwise -- qemu_xfstests.yaml
job always hits the 6 hour max_job_time limit.

As our tmpfs instance is limited and qemu_xfstests.yaml opens three
images at the same time, reduce the "big cache" size to 5G.  This facet
was added to iron out 32-bit head/tail pointer issues and 5G still does
the job there.

Going through the loop device is needed because tmpfs doesn't support
O_DIRECT.

Fixes: https://tracker.ceph.com/issues/55400
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2022-06-03 19:20:37 +02:00

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