Re: Regression with initramfs and nfsroot (appears to be in thedcache)

[Al Viro]

On Fri, Nov 30, 2012 at 01:58:18PM +0000, Myklebust, Trond wrote:

> The reason for the choice of d_drop over d_invalidate() is the d_count
> checks. It really doesn't matter whether or not the client thinks it has
> users for a directory if the server is telling you that it is ESTALE. So
> we force a d_drop to prevent further lookups from finding it.
> 
> IOW: It is there in order to fix the case where the user does
> 'rmdir("foo"); mkdir("foo")' on the server.

You do realize that your have_submounts() check in there is inherently
racy, right?
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