linux-kernel - [PATCH 0/2] ceph: metrics for remote object copies

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Date:   Wed,  3 Nov 2021 11:24:03 +0000
From:   Luís Henriques <lhenriques@...e.de>
To:     Jeff Layton <jlayton@...nel.org>,
        Ilya Dryomov <idryomov@...il.com>, Xiubo Li <xiubli@...hat.com>
Cc:     Patrick Donnelly <pdonnell@...hat.com>, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Luís Henriques <lhenriques@...e.de>
Subject: [PATCH 0/2] ceph: metrics for remote object copies

Following this email, I'm sending two patches that add support for a an
extra metric in the cephfs metrics infrastructure.

The 1st patch modifies libceph so that ceph_osdc_copy_from() returns an
OSD request and makes it responsibility of the caller to do the wait (and
release the request).  This is required so that the callers (currently
only the copy_file_range() syscall code) can access the request latency
timestamps.

The 2nd patch effectively adds support for the 'copyfrom' metrics.

Luís Henriques (2):
  libceph: have ceph_osdc_copy_from() return the osd request
  ceph: add a new metric to keep track of remote object copies

 fs/ceph/debugfs.c               |  3 ++-
 fs/ceph/file.c                  | 13 ++++++++++++-
 fs/ceph/metric.h                |  8 ++++++++
 include/linux/ceph/osd_client.h | 21 +++++++++++----------
 net/ceph/osd_client.c           | 27 ++++++++++++++-------------
 5 files changed, 47 insertions(+), 25 deletions(-)