Following this email I'm sending two patches that contain optimizations for the quota implementation. They were both suggested by Zheng Yan. The first patch modifies the snaprealm structure to include an extra field that will cache an inode pointer (but doesn't keep a ref to it). This will remove the need for extra ceph_find_inode() calls while walking through the snaprealm hierarchy. The 2nd patch keeps a counter of inodes that have quota set. By keeping this counter, it is possible to short-circuit quota checks if we don't have any inode with quotas on the filesystem. NOTE: these 2 patches are based on the current ceph-client testing branch, not on mainline kernel. Luis Henriques (2): ceph: quota: cache inode pointer in ceph_snap_realm ceph: quota: add counter for snaprealms with quota fs/ceph/inode.c | 3 +-- fs/ceph/mds_client.c | 1 + fs/ceph/mds_client.h | 2 ++ fs/ceph/quota.c | 60 ++++++++++++++++++++++++++++++++++------------------ fs/ceph/snap.c | 9 ++++++++ fs/ceph/super.h | 4 ++++ 6 files changed, 57 insertions(+), 22 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
