| From: |
| Baolin Liu <liubaolin12138-AT-163.com> |
| To: |
| tytso-AT-mit.edu, adilger.kernel-AT-dilger.ca, libaokun-AT-linux.alibaba.com, jack-AT-suse.cz, ojaswin-AT-linux.ibm.com, ritesh.list-AT-gmail.com, yi.zhang-AT-huawei.com, corbet-AT-lwn.net, skhan-AT-linuxfoundation.org |
| Subject: |
| [PATCH v5 v5 0/3] ext4: improve mballoc statistics reporting and control |
| Date: |
| Fri, 22 May 2026 11:59:02 +0800 |
| Message-ID: |
| <20260522035905.1145743-1-liubaolin12138@163.com> |
| Cc: |
| linux-ext4-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, Baolin Liu <liubaolin12138-AT-163.com> |
| Archive-link: |
| Article |
This series improves mballoc statistics reporting and control by adding
blocks_allocated to /proc/fs/ext4/<dev>/mb_stats, using
READ_ONCE()/WRITE_ONCE() for concurrent accesses to s_mb_stats, and
allowing mballoc stats to be controlled through
/proc/fs/ext4/<dev>/mb_stats.
Changes in v5:
- Use READ_ONCE()/WRITE_ONCE() for s_mb_stats accesses instead of
converting s_mb_stats to atomic_t, as suggested in review.
- For proc mb_stats writes of -1, disable stats collection before
clearing the counters, then re-enable it.
Baolin Liu (3):
ext4: add blocks_allocated to mb_stats output
ext4: use READ_ONCE/WRITE_ONCE for s_mb_stats
ext4: allow controlling mballoc stats through proc mb_stats
Documentation/ABI/testing/sysfs-fs-ext4 | 3 +-
Documentation/admin-guide/ext4.rst | 9 ++-
Documentation/filesystems/proc.rst | 13 +----
fs/ext4/ext4.h | 1 +
fs/ext4/mballoc.c | 57 ++++++++++++++-----
fs/ext4/sysfs.c | 73 ++++++++++++++++++++++++-
6 files changed, 126 insertions(+), 30 deletions(-)
--
2.51.0
