Re: [PATCH v5 0/7] ceph: don't request caps for idle open files

[Jeff Layton <jlayton@kernel.org>]

On Thu, 2020-03-05 at 20:20 +0800, Yan, Zheng wrote:
> This series make cephfs client not request caps for open files that
> idle for a long time. For the case that one active client and multiple
> standby clients open the same file, this increase the possibility that
> mds issues exclusive caps to the active client.
> 
> Yan, Zheng (7):
>   ceph: always renew caps if mds_wanted is insufficient
>   ceph: consider inode's last read/write when calculating wanted caps
>   ceph: remove delay check logic from ceph_check_caps()
>   ceph: simplify calling of ceph_get_fmode()
>   ceph: update i_requested_max_size only when sending cap msg to auth mds
>   ceph: check all mds' caps after page writeback
>   ceph: calculate dir's wanted caps according to recent dirops
> 
>  fs/ceph/caps.c               | 360 ++++++++++++++++-------------------
>  fs/ceph/dir.c                |  21 +-
>  fs/ceph/file.c               |  45 ++---
>  fs/ceph/inode.c              |  21 +-
>  fs/ceph/ioctl.c              |   2 +
>  fs/ceph/mds_client.c         |  16 +-
>  fs/ceph/super.h              |  37 ++--
>  include/linux/ceph/ceph_fs.h |   1 +
>  8 files changed, 243 insertions(+), 260 deletions(-)
> 
> changes since v2
>  - make __ceph_caps_file_wanted() more readable
>  - add patch 5 and 6, which fix hung write during testing patch 1~4
> 
> changes since v3
>  - don't queue delayed cap check for snap inode
>  - initialize ci->{last_rd,last_wr} to jiffies - 3600 * HZ
>  - make __ceph_caps_file_wanted() check inode type
> 
> changes since v4
>  - add patch 7, improve how to calculate dir's wanted caps
> 

Thanks Zheng. This one seems to work just fine. Merged into ceph-
client/testing branch with the following changes:

- squashed patch 7 into patch 2
- cleaned up a few changelog grammatical and spelling errors
- fix a small bit of whitespace damage

Thanks!
-- 
Jeff Layton <jlayton@kernel.org>