Re: FSCache: Cookie create and destroy semantics on file open

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Can you share those patches? I'd like to know what the approach you've
taken since I'm trying to figure out how to solve it for Ceph.

- M

On Aug 7, 2013, at 2:04 AM, David Howells <dhowells@xxxxxxxxxx> wrote:

> Milosz Tanski <milosz@xxxxxxxxx> wrote:
>
>> I have a question for you about how added / removing the cookie for a
>> NFS inode works. Right the cache entry gets added when the file is
>> open. It gets revoked when the file re-opened in write mode. What
>> happens in this case.
>>
>> Open for read (create cookie) -> Open for write (destroy cookie) ->
>> Open for read (create cookie again)
>>
>> In this case, none of the 3 files were closed.
>
> No.  The way NFS is doing this is wrong.  I have been given some patches that
> should fix this, I think.
>
> David

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