diff options
| author |   NeilBrown <neilb@suse.de> | 2022-03-07 10:41:44 +1100 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2022-03-13 12:59:35 -0400 |
| commit | 4dc73c679114a2f408567e2e44770ed934190db2 (patch) | |
| tree | d3ba3f6bab7ad6682066ac22c41d8dc384f70581 /fs/nfs/file.c | |
| parent | SUNRPC: improve 'swap' handling: scheduling and PF_MEMALLOC (diff) | |
| download | linux-dev-4dc73c679114a2f408567e2e44770ed934190db2.tar.xz linux-dev-4dc73c679114a2f408567e2e44770ed934190db2.zip | |
NFSv4: keep state manager thread active if swap is enabled
If we are swapping over NFSv4, we may not be able to allocate memory to
start the state-manager thread at the time when we need it.
So keep it always running when swap is enabled, and just signal it to
start.
This requires updating and testing the cl_swapper count on the root
rpc_clnt after following all ->cl_parent links.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/file.c')
| -rw-r--r-- | fs/nfs/file.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 93c01aaa0a8d..d31bc430dce3 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -483,8 +483,9 @@ static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file, { unsigned long blocks; long long isize; - struct rpc_clnt *clnt = NFS_CLIENT(file->f_mapping->host); - struct inode *inode = file->f_mapping->host; + struct inode *inode = file_inode(file); + struct rpc_clnt *clnt = NFS_CLIENT(inode); + struct nfs_client *cl = NFS_SERVER(inode)->nfs_client; spin_lock(&inode->i_lock); blocks = inode->i_blocks; @@ -497,14 +498,22 @@ static int nfs_swap_activate(struct swap_info_struct *sis, struct file *file, *span = sis->pages; + + if (cl->rpc_ops->enable_swap) + cl->rpc_ops->enable_swap(inode); + return rpc_clnt_swap_activate(clnt); } static void nfs_swap_deactivate(struct file *file) { - struct rpc_clnt *clnt = NFS_CLIENT(file->f_mapping->host); + struct inode *inode = file_inode(file); + struct rpc_clnt *clnt = NFS_CLIENT(inode); + struct nfs_client *cl = NFS_SERVER(inode)->nfs_client; rpc_clnt_swap_deactivate(clnt); + if (cl->rpc_ops->disable_swap) + cl->rpc_ops->disable_swap(file_inode(file)); } const struct address_space_operations nfs_file_aops = { |