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| author | Zhi Zhang <zhang.david2011@gmail.com> | 2018-01-24 21:24:33 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-01-29 18:36:12 +0100 |
| commit | e30ee58121e34831b9665934d70dbc72ab0fe2fb (patch) | |
| tree | 23b4eb7cb77f82d5326efbe3af44d152aa75a953 /fs/ceph/mds_client.h | |
| parent | 0f439c746c8cb370ce3ae1668182b18a5cb12b14 (diff) | |
| download | lwn-e30ee58121e34831b9665934d70dbc72ab0fe2fb.tar.gz lwn-e30ee58121e34831b9665934d70dbc72ab0fe2fb.zip | |
ceph: try to allocate enough memory for reserved caps
ceph_reserve_caps() may not reserve enough caps under high memory
pressure, but it saved the needed caps number that expected to
be reserved. When getting caps, crash would happen due to number
mismatch.
Now we will try to trim more caps when failing to allocate memory
for caps need to be reserved, then try again. If still failing to
allocate memory, return -ENOMEM.
Signed-off-by: Zhi Zhang <zhang.david2011@gmail.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/mds_client.h')
| -rw-r--r-- | fs/ceph/mds_client.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index 837ac4b087a0..71e3b783ee6f 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -444,4 +444,7 @@ ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target); extern void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc, struct ceph_mds_session *session); +extern int ceph_trim_caps(struct ceph_mds_client *mdsc, + struct ceph_mds_session *session, + int max_caps); #endif |