Re: RFC: iomap write invalidation

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On Tue, Jul 21, 2020 at 05:16:16PM +0200, Christoph Hellwig wrote:
> On Tue, Jul 21, 2020 at 04:14:37PM +0100, Matthew Wilcox wrote:
> > On Tue, Jul 21, 2020 at 05:06:15PM +0200, Christoph Hellwig wrote:
> > > On Tue, Jul 21, 2020 at 04:04:32PM +0100, Matthew Wilcox wrote:
> > > > I thought you were going to respin this with EREMCHG changed to ENOTBLK?
> > > 
> > > Oh, true.  I'll do that ASAP.
> > 
> > Michael, could we add this to manpages?
> 
> Umm, no.  -ENOTBLK is internal - the file systems will retry using
> buffered I/O and the error shall never escape to userspace (or even the
> VFS for that matter).

It's worth dropping a comment somewhere that ENOTBLK is the desired
"fall back to buffered" errcode, seeing as Dave and I missed that in
XFS...

--D



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