Re: [PATCH v5 7/9] vfs: Remove copy_file_range mountpoint checks

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On 10/11/2015 10:23 AM, Christoph Hellwig wrote:
> On Wed, Sep 30, 2015 at 01:26:51PM -0400, Anna Schumaker wrote:
>> I still want to do an in-kernel copy even if the files are on different
>> mountpoints, and NFS has a "server to server" copy that expects two
>> files on different mountpoints.  Let's have individual filesystems
>> implement this check instead.
> 
> NAK.  I thing this is a bad idea in general and will only be convinced
> by a properly audited actual implementation.  And even then with a flag
> where the file system specificly needs to opt into this behavior instead
> of getting it by default.
> 

So I should drop this patch even with the pagecache copy?  Andy Adamson will have to add it in later as part of his server-to-server patches.

Anna
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