Re: [PATCH v2] xfs: fix iclog release error check race with shutdown

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On Thu, Feb 20, 2020 at 07:41:44AM -0500, Brian Foster wrote:
> I wasn't planning on a v3. The discussion to this point has been
> centered around the xfs_force_shutdown() call in the associated function
> (which is orthogonal to the bug). v1 is technically correct, but
> Christoph suggested to restore historical behavior wrt to the shutdown
> call. v2 does that, but is a bit superfluous in that the iclog error
> state with the lock held implies shutdown has already occurred. This is
> harmless (unless we're worried about shutdown performance or
> something..), but I think Dave indicated he preferred v1 based on that
> reasoning.
> 
> Functionally I don't think it matters either way and at this point I
> have no preference between v1 or v2. They fix the same problem. Do note
> that v2 does have the Fixed: tag I missed with v1 (as well as a R-b)...

I'm fine with v1 after all this discussion, and volunteer to clean up
all the ioerr handling for the log code after this fix goes in.

That being said as noted in one of my replies I think we also need to
add the same check in the other caller of __xlog_state_release_iclog.



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