Re: [PATCH v4 08/18] tools/testing/nvdimm: add 'bio_delay' mechanism

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On Sat, Dec 23, 2017 at 04:56:43PM -0800, Dan Williams wrote:
> In support of testing truncate colliding with dma add a mechanism that
> delays the completion of block I/O requests by a programmable number of
> seconds. This allows a truncate operation to be issued while page
> references are held for direct-I/O.
> 
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>

Why not put this in the generic bio layer code and then write a
generic fstest to exercise this truncate vs direct IO completion
race condition on all types of storage and filesystems?

i.e. if it sits in a nvdimm test suite, it's never going to be run
by filesystem developers....

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx
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