Re: dm-crypt: set max_io_len as chunk_sectors of zoned device

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On Mon, Nov 25, 2024 at 03:49:01PM +0800, LongPing Wei wrote:
> On 2024/11/25 14:11, Christoph Hellwig wrote:
> > On Mon, Nov 25, 2024 at 03:07:24PM +0900, Damien Le Moal wrote:
> > > 100% agree. But in this case, dm-crypt sees a single BIO which gets split when
> > > submitted to the underlying device. But the split issues the requests in
> > > reverse order, which breaks write ordering.
> > 
> > I'd like to see verification of this.  People who send these kinds of
> > odd old kernel reports tend to have weird patches applied to their tree
> > as well.
> > 
> > Without an upstream reproducer that actually shows issues I think
> > this can be safely ignored.
> > 
> Thanks for your suggestions.
> I will try to make another patch of fault injection to reproduce it on qemu.
> 

If/when you do find it is relevant for latest upstream and/or
6.6-only: please add a "Fixes:" tag and also be explicit about which
kernel(s) your fix is applicable to.

Mike




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