[v2,0/6] Generic per-mount io stats

Message

Amir Goldstein Feb. 28, 2022, 11:39 a.m. UTC

Miklos,

Resending those patches with only minor change even though I did get
and feedback on v1 [1].

My use case specifically is for fuse, but I think these mount stats
can be useful for container use cases, either with overlayfs or even
with bind mounts, in order to help sysadmins bisect the source of io
from containers POV.

This revision opts-in for mountstats for all fuse/overlayfs mounts,
but we could also make it always opt-in by mount options for any fs.

Thoughts?

Thanks,
Amir.

Changes since v1:
- Opt-in for per-mount io stats for overlayfs and fuse

[1] https://lore.kernel.org/linux-fsdevel/[e-mail]/

Amir Goldstein (6):
  fs: add iostats counters to struct mount
  fs: tidy up fs_flags definitions
  fs: collect per-mount io stats
  fs: report per-mount io stats
  ovl: opt-in for per-mount io stats
  fuse: opt-in for per-mount io stats

 fs/Kconfig           |  9 ++++++
 fs/fuse/inode.c      |  2 +-
 fs/mount.h           | 59 +++++++++++++++++++++++++++++++++++
 fs/namespace.c       | 19 ++++++++++++
 fs/overlayfs/super.c |  2 +-
 fs/proc_namespace.c  | 13 ++++++++
 fs/read_write.c      | 73 +++++++++++++++++++++++++++++---------------
 include/linux/fs.h   | 15 ++++-----
 8 files changed, 159 insertions(+), 33 deletions(-)