| From: |
| Imran Khan <imran.f.khan-AT-oracle.com> |
| To: |
| tj-AT-kernel.org, gregkh-AT-linuxfoundation.org, viro-AT-zeniv.linux.org.uk, willy-AT-infradead.org |
| Subject: |
| [PATCH v2 0/3] kernfs: Introduce separate rwsem to protect inode |
| Date: |
| Thu, 09 Mar 2023 22:09:29 +1100 |
| Message-ID: |
| <20230309110932.2889010-1-imran.f.khan@oracle.com> |
| Cc: |
| linux-kernel-AT-vger.kernel.org, linux-fsdevel-AT-vger.kernel.org, joe.jin-AT-oracle.com |
| Archive-link: |
| Article |
Changes since v1:
- Remove kernfs_rwsem from kernfs_notify_workfn
- Include Matthew's "Reviewed-by" tag for Patch-3
-------------------------------------------------------------------
Original cover letter
This change set is consolidating the changes discussed and/or mentioned
in [1] and [2]. I have not received any feedback about any of the
patches included in this change set, so I am rebasing them on current
linux-next tip and bringing them all in one place.
As mentioned in [1], since changing per-fs kernfs_rwsem into a hashed
rwsem is not working for all scenarios, PATCH-1 here tries to address
the same issue with the help of another newly introduced per-fs rwsem.
PATCH-2 and PATCH-3 are basically resend of PATCH-1 and PATCH-2
respectively in [2].
It would be really helpful if I could get some feedback about this
changeset so that we can reduce the kernfs_rwsem contention and make
sysfs access more scalable for large-scale systems.
The patches in this change set are as follows:
PATCH-1: kernfs: Introduce separate rwsem to protect inode attributes.
PATCH-2: kernfs: Use a per-fs rwsem to protect per-fs list of
kernfs_super_info.
PATCH-3: kernfs: change kernfs_rename_lock into a read-write lock.
Imran Khan (3):
kernfs: Introduce separate rwsem to protect inode attributes.
Use a per-fs rwsem to protect per-fs list of kernfs_super_info.
kernfs: change kernfs_rename_lock into a read-write lock.
fs/kernfs/dir.c | 26 +++++++++++++++++---------
fs/kernfs/file.c | 2 ++
fs/kernfs/inode.c | 16 ++++++++--------
fs/kernfs/kernfs-internal.h | 2 ++
fs/kernfs/mount.c | 8 ++++----
5 files changed, 33 insertions(+), 21 deletions(-)
base-commit: 7f7a8831520f12a3cf894b0627641fad33971221
[1]:https://lore.kernel.org/all/74969b22-e0b6-30bd-a1f0-132f4...
[2]:https://lore.kernel.org/all/20220810111017.2267160-1-imra...
-------------------------------------------------------------------
Imran Khan (3):
kernfs: Introduce separate rwsem to protect inode attributes.
kernfs: Use a per-fs rwsem to protect per-fs list of
kernfs_super_info.
kernfs: change kernfs_rename_lock into a read-write lock.
fs/kernfs/dir.c | 26 +++++++++++++++++---------
fs/kernfs/file.c | 4 ++--
fs/kernfs/inode.c | 16 ++++++++--------
fs/kernfs/kernfs-internal.h | 2 ++
fs/kernfs/mount.c | 8 ++++----
5 files changed, 33 insertions(+), 23 deletions(-)
--
2.34.1
