Re: [PATCH RESEND] loop: clear wb_err in bd_inode when detaching backing file

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On 5/21/18 12:35 PM, Jeff Layton wrote:
> From: Jeff Layton <jlayton@xxxxxxxxxx>
> 
> When a loop block device encounters a writeback error, that error will
> get propagated to the bd_inode's wb_err field. If we then detach the
> backing file from it, attach another and fsync it, we'll get back the
> writeback error that we had from the previous backing file.
> 
> This is a bit of a grey area as POSIX doesn't cover loop devices, but it
> is somewhat counterintuitive.
> 
> If we detach a backing file from the loopdev while there are still
> unreported errors, take it as a sign that we're no longer interested in
> the previous file, and clear out the wb_err in the loop blockdev.

Applied, thanks Jeff.

-- 
Jens Axboe




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