Re: [RFC PATCH 0/8] block: add support for REQ_OP_VERIFY

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On Thu, Nov 04, 2021 at 10:32:35AM -0700, Darrick J. Wong wrote:
> I also wonder if it would be useful (since we're already having a
> discussion elsewhere about data integrity syscalls for pmem) to be able
> to call this sort of thing against files?  In which case we'd want
> another preadv2 flag or something, and then plumb all that through the
> vfs/iomap as needed?

IFF we do this (can't answer if there is a need) we should not
overload read with it.  It is an operation that does not return
data but just a status, so let's not get into that mess.



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