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
