On Fri, 2007-10-19 at 22:33 -0400, Erez Zadok wrote:
> Trond, good news. I was able to narrow down the problem to purely the
> client-side, probably dcache/readdir related, and I have a shell script that
> deterministically triggers the problem each time for me (this is a FC6 image
> under Vmware 6.0.1). Here's a short shell script which reliably triggers
> the "lost files" problem -- I create a file via nfs2 on the client side, and
> sometimes it doesn't show up in readdir, but it is there if you stat it
> directly.
Ah... I got confused as to what you were measuring and where. Looking at
nfs_proc_create(), there is indeed a missing call to
nfs_mark_for_revalidate(). The reason why you need such a call being the
usual one: NFSv2 doesn't provide post-op attributes for the directory.
The patch below ought to fix the problem.
Cheers
Trond
---------------------- CUT HERE -----------------------
From: Trond Myklebust <[email protected]>
Date: Sat, 20 Oct 2007 13:07:21 -0400
NFSv2: Ensure that the directory metadata gets revalidated on file create
Signed-off-by: Trond Myklebust <[email protected]>
---
fs/nfs/proc.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 97669ed..4f80d88 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -211,6 +211,7 @@ nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
nfs_fattr_init(&fattr);
dprintk("NFS call create %s\n", dentry->d_name.name);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+ nfs_mark_for_revalidate(dir);
if (status == 0)
status = nfs_instantiate(dentry, &fhandle, &fattr);
dprintk("NFS reply create: %d\n", status);
-
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