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| author | Dai Ngo <dai.ngo@oracle.com> | 2021-05-21 22:09:37 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-05-26 00:06:51 +0300 |
| commit | f4e44b393389c77958f7c58bf4415032b4cda15b (patch) | |
| tree | 44bb946e81e134a5ae0487807f1324f4d4709951 /fs/nfsd/nfssvc.c | |
| parent | eac0b17a77fbd763d305a5eaa4fd1119e5a0fe0d (diff) | |
| download | linux-f4e44b393389c77958f7c58bf4415032b4cda15b.tar.xz | |
NFSD: delay unmount source's export after inter-server copy completed.
Currently the source's export is mounted and unmounted on every
inter-server copy operation. This patch is an enhancement to delay
the unmount of the source export for a certain period of time to
eliminate the mount and unmount overhead on subsequent copy operations.
After a copy operation completes, a work entry is added to the
delayed unmount list with an expiration time. This list is serviced
by the laundromat thread to unmount the export of the expired entries.
Each time the export is being used again, its expiration time is
extended and the entry is re-inserted to the tail of the list.
The unmount task and the mount operation of the copy request are
synced to make sure the export is not unmounted while it's being
used.
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfssvc.c')
| -rw-r--r-- | fs/nfsd/nfssvc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index dd5d69921676..ccb59e91011b 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -403,6 +403,9 @@ static int nfsd_startup_net(struct net *net, const struct cred *cred) if (ret) goto out_filecache; +#ifdef CONFIG_NFSD_V4_2_INTER_SSC + nfsd4_ssc_init_umount_work(nn); +#endif nn->nfsd_net_up = true; return 0; |