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Gmane
From: Milosz Tanski <milosz <at> adfin.com>
Subject: [PATCHv4 0/5] ceph: persistent caching with fscache
Newsgroups: gmane.linux.kernel
Date: Wednesday 21st August 2013 21:26:41 UTC (over 3 years ago)
This an updated version of the fscache support for the Ceph filesystem.
What's
changed since the last patchset:

1. Sparater the readpages refactor into it's own patches. These were
already
   accepted into the testing branch.

2. Tracked down the BUG in readahead cleanup code. We were returning with
pages
   marked as private_2 from readpages(). I added a simple convenience
function
   to the fscache netfs interface for cleaning up the page list at the end
of
   asop readpages(). I know other filesystems (NFS) have ran into that
since
   I've seen a few similar traces in Google search and the cachefs mailig
list.
   The second patch new make Ceph use this interface.

I've been running this code (minus the BUG fix) on clients for a couple
weeks
with moderate 24/7 use without issues. At this point in time I feel like
it's
solid enough to go into the ceph kclient.

Please pull the code from my repository:
https://bitbucket.org/adfin/linux-fs.git
branch: wip-ceph-fscache

The first two patches I included were not written by me but were written by

Hongyi Jia. He implemented the cookie re-validation scheme into fscache
core.

Finally, I CCed a couple other mailing lists (fsdevel, nfs) because the new
fscache_readpages_cancel() should be used by other filesystems to avoid the
same problem.


Hongyi Jia (2):
  new cachefiles interface to check cache consistency
  new fscache interface to check cache consistency

Milosz Tanski (3):
  ceph: use fscache as a local presisent cache
  fscache: netfs function for cleanup post readpages
  ceph: clean PgPrivate2 on returning from readpages

 fs/cachefiles/interface.c     |  19 +++
 fs/cachefiles/internal.h      |   1 +
 fs/cachefiles/xattr.c         |  39 ++++++
 fs/ceph/Kconfig               |   9 ++
 fs/ceph/Makefile              |   2 +
 fs/ceph/addr.c                |  39 +++++-
 fs/ceph/cache.c               | 311
++++++++++++++++++++++++++++++++++++++++++
 fs/ceph/cache.h               | 130 ++++++++++++++++++
 fs/ceph/caps.c                |  19 ++-
 fs/ceph/file.c                |  17 +++
 fs/ceph/inode.c               |  66 ++++++++-
 fs/ceph/super.c               |  47 ++++++-
 fs/ceph/super.h               |  17 +++
 fs/fscache/cookie.c           |  22 +++
 fs/fscache/page.c             |  16 +++
 include/linux/fscache-cache.h |   4 +
 include/linux/fscache.h       |  39 ++++++
 17 files changed, 785 insertions(+), 12 deletions(-)
 create mode 100644 fs/ceph/cache.c
 create mode 100644 fs/ceph/cache.h

-- 
1.8.1.2
 
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