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| author | David Howells | 2009-04-03 17:42:43 +0200 |
|---|---|---|
| committer | David Howells | 2009-04-03 17:42:43 +0200 |
| commit | 6a51091d0775cdc4a923f2172c61925ad416aa32 (patch) | |
| tree | 288fafe724eee5a0c67ff4c9bd437d35d3bbb9ab /fs/nfs/super.c | |
| parent | NFS: Invalidate FsCache page flags when cache removed (diff) | |
| download | kernel-qcow2-linux-6a51091d0775cdc4a923f2172c61925ad416aa32.tar.gz kernel-qcow2-linux-6a51091d0775cdc4a923f2172c61925ad416aa32.tar.xz kernel-qcow2-linux-6a51091d0775cdc4a923f2172c61925ad416aa32.zip | |
NFS: Add some new I/O counters for FS-Cache doing things for NFS
Add some new NFS I/O counters for FS-Cache doing things for NFS. A new line is
emitted into /proc/pid/mountstats if caching is enabled that looks like:
fsc: <rok> <rfl> <wok> <wfl> <unc>
Where <rok> is the number of pages read successfully from the cache, <rfl> is
the number of failed page reads against the cache, <wok> is the number of
successful page writes to the cache, <wfl> is the number of failed page writes
to the cache, and <unc> is the number of NFS pages that have been disconnected
from the cache.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@framestore.com>
Diffstat (limited to 'fs/nfs/super.c')
| -rw-r--r-- | fs/nfs/super.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 87f65ae07f32..b5fea776a0dc 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -642,6 +642,10 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) totals.events[i] += stats->events[i]; for (i = 0; i < __NFSIOS_BYTESMAX; i++) totals.bytes[i] += stats->bytes[i]; +#ifdef CONFIG_NFS_FSCACHE + for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) + totals.fscache[i] += stats->fscache[i]; +#endif preempt_enable(); } @@ -652,6 +656,13 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) seq_printf(m, "\n\tbytes:\t"); for (i = 0; i < __NFSIOS_BYTESMAX; i++) seq_printf(m, "%Lu ", totals.bytes[i]); +#ifdef CONFIG_NFS_FSCACHE + if (nfss->options & NFS_OPTION_FSCACHE) { + seq_printf(m, "\n\tfsc:\t"); + for (i = 0; i < __NFSIOS_FSCACHEMAX; i++) + seq_printf(m, "%Lu ", totals.bytes[i]); + } +#endif seq_printf(m, "\n"); rpc_print_iostats(m, nfss->client); |