On Thu, Aug 11, 2022 at 10:14 AM Logan Gunthorpe <logang@xxxxxxxxxxxx> wrote: > > From: David Sloan <david.sloan@xxxxxxxxxxxxx> > > A race condition still exists when removing and re-creating md devices > in test cases. However, it is only seen on some setups. > > The race condition was tracked down to a reference still being held > to the kobject by the rdev in the md_rdev_misc_wq which will be released > in rdev_delayed_delete(). > > md_alloc() waits for previous deletions by waiting on the md_misc_wq, > but the md_rdev_misc_wq may still be holding a reference to a recently > removed device. > > To fix this, also flush the md_rdev_misc_wq in md_alloc(). > > Signed-off-by: David Sloan <david.sloan@xxxxxxxxxxxxx> > [logang@xxxxxxxxxxxx: rewrote commit message] > Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx> Applied 1/5 to md-fixes. Thanks! Song
