This patchset coverts ceph to use the new netfs API that David Howells has proposed [1]. It's a substantial reduction in code in the ceph layer itself, but the main impetus is to allow the VM, filesystem and fscache to better work together to optimize readahead on network filesystems. I think the resulting code is also easier to understand, and should be more maintainable as a lot of the pagecache handling is now done at the netfs layer. This has been lightly tested with xfstests. With fscache disabled, I saw no regressions. With fscache enabled, I still hit some bugs down in the fscache layer itself, but those seem to be present without this set as well. This doesn't seem to make any of that worse. [1]: https://lore.kernel.org/ceph-devel/1856291.1611259704@xxxxxxxxxxxxxxxxxxxxxx/T/#t Jeff Layton (6): ceph: disable old fscache readpage handling ceph: rework PageFsCache handling ceph: fix invalidation ceph: convert readpage to fscache read helper ceph: plug write_begin into read helper ceph: convert ceph_readpages to ceph_readahead fs/ceph/Kconfig | 1 + fs/ceph/addr.c | 536 +++++++++++++++++++----------------------------- fs/ceph/cache.c | 123 ----------- fs/ceph/cache.h | 101 +++------ fs/ceph/caps.c | 10 +- fs/ceph/inode.c | 1 + 6 files changed, 236 insertions(+), 536 deletions(-) -- 2.29.2
