Hi Christian,
Here are a couple of patches that fix the use of fscaching with ceph:
(1) Fix the read collector to mark the write request that it creates to copy
data to the cache with NETFS_RREQ_OFFLOAD_COLLECTION so that it will run
the write collector on a workqueue as it's meant to run in the background
and the app isn't going to wait for it.
(2) Fix the read collector to wake up the copy-to-cache write request after
it sets NETFS_RREQ_ALL_QUEUED if the write request doesn't have any
subrequests left on it. ALL_QUEUED indicates that there won't be any
more subreqs coming and the collector should clean up - except that an
event is needed to trigger that, but it only gets events from subreq
termination and so the last event can beat us to setting ALL_QUEUED.
The patches can also be found here:
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=netfs-fixes
Thanks,
David
David Howells (2):
netfs: Fix copy-to-cache so that it performs collection with
ceph+fscache
netfs: Fix race between cache write completion and ALL_QUEUED being
set
fs/netfs/read_pgpriv2.c | 5 +++++
include/trace/events/netfs.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
