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| author | Shakeel Butt <shakeel.butt@linux.dev> | 2026-08-20 22:05:05 -0700 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-08-31 10:04:58 +0200 |
| commit | ea1c84cca6ab94c7680a68a2560fcf992f3728ba (patch) | |
| tree | ea37f703f4f3e748faad32f4d9b79a9a82962b9a /tools/lib/python | |
| parent | 0ef1e65c9f63c37d4665869263e9736281d9773b (diff) | |
| download | linux-next-ea1c84cca6ab94c7680a68a2560fcf992f3728ba.tar.gz linux-next-ea1c84cca6ab94c7680a68a2560fcf992f3728ba.zip | |
kernfs: Prepare directory revisions for lockless reads
Negative dentry revalidation only needs to sample the parent directory
generation and compare it with the value recorded at lookup time.
Annotate those accesses with READ_ONCE() and WRITE_ONCE() so the
comparison can safely move outside kernfs_rwsem.
Revision updates remain serialized by kernfs_rwsem. Assert that writer
contract in kernfs_inc_rev(); the read half of the increment stays plain
because the semaphore excludes other writers.
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Link: https://patch.msgid.link/20260821050507.2161607-3-shakeel.butt@linux.dev
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions