Re: fix a pmem regression due to drain the block queue in del_gendisk

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Verified the issue was fixed by this patchset.
https://lore.kernel.org/linux-block/CAHj4cs87BapQJcV0a=M6=dc9PrsGH6qzqJEt9fbjLK1aShnMPg@xxxxxxxxxxxxxx/

Tested-by: Yi Zhang <yi.zhang@xxxxxxxxxx>


On Tue, Oct 19, 2021 at 3:37 PM Christoph Hellwig <hch@xxxxxx> wrote:
>
> Hi Dan,
>
> this series fixes my recently introduced regression in the pmem driver by
> removing the usage of q_usage_count as the external pgmap refcount in the
> pmem driver and then removes the now unused external refcount
> infrastructure.
>
> Diffstat:
>  drivers/nvdimm/pmem.c             |   33 +--------------------
>  include/linux/memremap.h          |   18 +----------
>  mm/memremap.c                     |   59 +++++++-------------------------------
>  tools/testing/nvdimm/test/iomap.c |   43 +++++++--------------------
>  4 files changed, 29 insertions(+), 124 deletions(-)
>


--
Best Regards,
  Yi Zhang





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