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| author | Trond Myklebust | 2019-02-14 23:32:40 +0100 |
|---|---|---|
| committer | Trond Myklebust | 2019-03-02 04:37:38 +0100 |
| commit | 76c6690522bb3e335ce1e201360df8776cab4d2c (patch) | |
| tree | ade5acb43b8b1a85e6c85f032e0c1632b1bf6eee /fs/nfs/pnfs_dev.c | |
| parent | NFS/flexfiles: Don't invalidate DS deviceids for being unresponsive (diff) | |
| download | kernel-qcow2-linux-76c6690522bb3e335ce1e201360df8776cab4d2c.tar.gz kernel-qcow2-linux-76c6690522bb3e335ce1e201360df8776cab4d2c.tar.xz kernel-qcow2-linux-76c6690522bb3e335ce1e201360df8776cab4d2c.zip | |
NFS/flexfiles: Speed up read failover when DSes are down
If we notice that a DS may be down, we should attempt to read from the
other mirrors first before we go back to retry the dead DS.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/pnfs_dev.c')
| -rw-r--r-- | fs/nfs/pnfs_dev.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c index ec6b607ff1d7..537b80d693f1 100644 --- a/fs/nfs/pnfs_dev.c +++ b/fs/nfs/pnfs_dev.c @@ -284,6 +284,16 @@ nfs4_put_deviceid_node(struct nfs4_deviceid_node *d) EXPORT_SYMBOL_GPL(nfs4_put_deviceid_node); void +nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node) +{ + if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags)) { + clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags); + smp_mb__after_atomic(); + } +} +EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_available); + +void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node) { node->timestamp_unavailable = jiffies; |