diff options
| author | Remi Pommarel <repk@triplefau.lt> | 2026-05-21 11:40:30 +0200 |
|---|---|---|
| committer | Dominique Martinet <asmadeus@codewreck.org> | 2026-05-29 02:16:40 +0000 |
| commit | 7025a34eda23ddedcb1c1d585b7bdc66586434f4 (patch) | |
| tree | 458e42b580c659a59a9dde6f1940fcd7b2df9b9f /Documentation | |
| parent | e7b0c932b719b7f54e5e10c467b234ce36bb7ab7 (diff) | |
| download | linux-next-history-7025a34eda23ddedcb1c1d585b7bdc66586434f4.tar.gz | |
9p: Add mount option for negative dentry cache retention
Introduce a new mount option, negtimeout, for v9fs that allows users
to specify how long negative dentries are retained in the cache. The
retention time can be set in milliseconds (e.g. negtimeout=10000 for
a 10secs retention time) or a negative value (e.g. negtimeout=-1) to
keep negative entries until the buffer cache management removes them.
For consistency reasons, this option should only be used in exclusive
or read-only mount scenarios, aligning with the cache=loose usage.
Signed-off-by: Remi Pommarel <repk@triplefau.lt>
Message-ID: <b2d66500aa5a2f6540347c4aa46a4be10dd01bc6.1779355927.git.repk@triplefau.lt>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/9p.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/filesystems/9p.rst b/Documentation/filesystems/9p.rst index 65809a1dad218..3f65db648db06 100644 --- a/Documentation/filesystems/9p.rst +++ b/Documentation/filesystems/9p.rst @@ -235,6 +235,11 @@ Options cachetag cache tag to use the specified persistent cache. cache tags for existing cache sessions can be listed at /sys/fs/9p/caches. (applies only to cache=fscache) + + negtimeout the duration (in milliseconds) that negative dentries (paths + that do not actually exist) are retained in the cache. If + set to a negative value, those entries are kept indefinitely + until evicted by the buffer cache management system ============= =============================================================== Behavior |