Re: [PATCH v5 02/12] VFS: generic cross-device copy_file_range() support for all filesystems

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On Mon, Oct 29, 2018 at 01:40:49PM -0400, Olga Kornievskaia wrote:
> From: Olga Kornievskaia <kolga@xxxxxxxxxx>
> 
> If a filesystem does not support cross device or cross file system
> type copy offload functionality, then this patch provides a fallback
> to a page cache based physical data copy. This means the
> copy_file_range() systemcall will never fail with EXDEV, and so in
> future userspace will not need to detect or provide a fallback for
> failed cross-device copies anymore.
> 
> Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>

Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>



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