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ceph: add mount option to limit caps count

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If number of caps exceed the limit, ceph_trim_dentires() also trim
dentries with valid leases. Trimming dentry releases references to
associated inode, which may evict inode and release caps.

By default, there is no limit for caps count.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng
2019-02-01 14:57:15 +08:00
committed by Ilya Dryomov
parent 37c4efc1dd
commit fe33032daa
8 changed files with 91 additions and 21 deletions
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4
Documentation/filesystems/ceph.txt
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@@ -118,6 +118,10 @@ Mount Options
of a non-responsive Ceph file system. The default is 30
seconds.
caps_max=X
Specify the maximum number of caps to hold. Unused caps are released
when number of caps exceeds the limit. The default is 0 (no limit)
rbytes
When stat() is called on a directory, set st_size to 'rbytes',
the summation of file sizes over all files nested beneath that