NFS: Add a tracepoint to show the results of nfs_set_cache_invalid()

This provides some insight into the client's invalidation behavior to show both when the client uses the helper, and the results of calling the helper which can vary depending on how the helper is called. Signed-off-by: Benjamin Coddington <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
NVIDIA · Nov 17, 2021 · 93c2e5e · 93c2e5e
1 parent d3c4582
commit 93c2e5e
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diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
@@ -219,6 +219,7 @@ void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
 					  NFS_INO_DATA_INVAL_DEFER);
 	else if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
 		nfsi->cache_validity &= ~NFS_INO_DATA_INVAL_DEFER;
+	trace_nfs_set_cache_invalid(inode, 0);
 }
 EXPORT_SYMBOL_GPL(nfs_set_cache_invalid);
 

diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
@@ -162,6 +162,7 @@ DEFINE_NFS_INODE_EVENT_DONE(nfs_writeback_inode_exit);
 DEFINE_NFS_INODE_EVENT(nfs_fsync_enter);
 DEFINE_NFS_INODE_EVENT_DONE(nfs_fsync_exit);
 DEFINE_NFS_INODE_EVENT(nfs_access_enter);
+DEFINE_NFS_INODE_EVENT_DONE(nfs_set_cache_invalid);
 
 TRACE_EVENT(nfs_access_exit,
 		TP_PROTO(