On Tue, Sep 27, 2022 at 5:09 AM Keith Busch <kbusch@xxxxxx> wrote: > > From: Keith Busch <kbusch@xxxxxxxxxx> > > The hctx's work may be racing with the elevator switch that occurs when > reinitializing hardware queues. This happens because the queue is merely > frozen in this context, but that only prevents requests from allocating > and doesn't stop the hctx work from running. When swapping the io > scheduler, this leaves a race condition open where the work may get a > pointer to an elevator that's being torn down. Use the quiesced elevator > switch instead. > > Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx> This patch should fix one kernel panic when running stress test(elevator switch vs nvme pci reset/scan). Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
