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authorDavid Howells <dhowells@redhat.com>2009-04-03 19:42:43 +0400
committerDavid Howells <dhowells@redhat.com>2009-04-03 19:42:43 +0400
commit6a51091d0775cdc4a923f2172c61925ad416aa32 (patch)
tree288fafe724eee5a0c67ff4c9bd437d35d3bbb9ab /fs/nfs/iostat.h
parentd599064a1bca7bcbaabe54b94fa73ea86952cae3 (diff)
downloadlinux-6a51091d0775cdc4a923f2172c61925ad416aa32.tar.xz
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/iostat.h')
-rw-r--r--fs/nfs/iostat.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/nfs/iostat.h b/fs/nfs/iostat.h
index a36952810032..a2ab2529b5ca 100644
--- a/fs/nfs/iostat.h
+++ b/fs/nfs/iostat.h
@@ -16,6 +16,9 @@
struct nfs_iostats {
unsigned long long bytes[__NFSIOS_BYTESMAX];
+#ifdef CONFIG_NFS_FSCACHE
+ unsigned long long fscache[__NFSIOS_FSCACHEMAX];
+#endif
unsigned long events[__NFSIOS_COUNTSMAX];
} ____cacheline_aligned;
@@ -57,6 +60,21 @@ static inline void nfs_add_stats(const struct inode *inode,
nfs_add_server_stats(NFS_SERVER(inode), stat, addend);
}
+#ifdef CONFIG_NFS_FSCACHE
+static inline void nfs_add_fscache_stats(struct inode *inode,
+ enum nfs_stat_fscachecounters stat,
+ unsigned long addend)
+{
+ struct nfs_iostats *iostats;
+ int cpu;
+
+ cpu = get_cpu();
+ iostats = per_cpu_ptr(NFS_SERVER(inode)->io_stats, cpu);
+ iostats->fscache[stat] += addend;
+ put_cpu_no_resched();
+}
+#endif
+
static inline struct nfs_iostats *nfs_alloc_iostats(void)
{
return alloc_percpu(struct nfs_iostats);