Re: loop: it looks like REQ_OP_FLUSH could return before IO completion.

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On Sat, Mar 19, 2022 at 10:14:29AM -0700, Eric Wheeler wrote:
> Hello all,
> 
> In loop.c do_req_filebacked() for REQ_OP_FLUSH, lo_req_flush() is called: 
> it does not appear that lo_req_flush() does anything to make sure 
> ki_complete has been called for pending work, it just calls vfs_fsync().
> 
> Is this a consistency problem?

No. What FLUSH command provides is just flushing cache in device side to
storage medium, so it is nothing to do with pending request.


Thanks, 
Ming




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