Re: [PATCH 1/2] xfs: handle bio split errors during gc

[Christoph Hellwig <hch@lst.de>]

On Mon, Oct 20, 2025 at 08:54:46AM -0600, Keith Busch wrote:
> > Ugg, how?  If that actually happens we're toast, so we should find a
> > way to ensure it does not happen.
> 
> You'd have to attempt sending an invalid bvec, like something that can't
> DMA map because you have a byte aligned offset, or the total size is
> smaller than the block device's.
> 
> Not that you're doing anything like that here. This condition should
> never occur in this path because the bio vectors are all nicely aligned.
> It's just for completeness to ensure it doesn't go uncaught for every
> bio split caller.

So this is just from code inspection and you did not actually hit
such a case?

I'll see if I can add some sanity checking for the buffer and
preferably handle this outside the I/O path where error handling
for this doesn't really make sense.