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SubjectRe: [PATCH 1/1] block: rework flush sequencing for blk-mq
On Wed, Mar 12 2014 at  6:28am -0400,
Christoph Hellwig <hch@infradead.org> wrote:

> On Sat, Mar 08, 2014 at 08:51:18PM +0100, Hannes Reinecke wrote:
> > Hey, calm down.
> > I've made the fix just two days ago. And was quite surprised that
> > I've been the first hitting that; should've crashed for everybody
> > using dm-multipath.
> > And given the pushback I've gotten recently from patches I would
> > have thought that it would work for most users; sure the author
> > would've done due diligence on the original patchset ...
>
> There's very little testing of dm-multipath for upstream work, as I've
> seen tons of avoidable breakage. Doesn't help that it uses a special
> code path that one else uses.

Pretty ironic that in the same email that you ask someone to "Let's make
this a little less personal." you start by asserting upstream
dm-multipath sees very little testing -- and use your commit that
recently broke dm-multipath as the basis. Anyway, please exapnd on what
you feel is broken with upstream dm-multipath.

And please be specific about whether it is SCSI/block or dm-multipath
code that has regressed.

> > BTW, it not _my_ decision to sit on tons of SUSE specific patches.
> > I really try to get things upstream. But I cannot do more than
> > sending patches upstream, answer patiently any questions, and redo
> > the patchset.
> > Which I did. Frequently, But, alas, it's up to the maintainer to
> > apply them. And I can only ask and hope. The usual story...
>
> Let's make this a little less personal. Fact is that the SuSE trees
> have tons of patches in there that never have even been sent upstream.
> There's also tons that have been posted once or twice. While I feel
> your frustration with the SCSI process fully and we'll need to work on
> that somehow, how about you do another round of dumping the DM patches
> on the dm-devel list and Mike?
>
> I'll ping some of the other worst offenders as time permits.
>


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