On Mon, Feb 15, 2021 at 10:46:23PM +0000, David Howells wrote: > The in_softirq() in netfs_rreq_terminated() works fine for the cache being > on a normal disk, as the completion handlers may get called in softirq > context, but for an NVMe drive, the completion handler may get called in > IRQ context. > > Fix to use in_interrupt() instead of in_softirq() throughout the read > helpers, particularly when deciding whether to punt code that might sleep > off to a worker thread. We must not use either check, as they all are unreliable especially for PREEMPT-RT.
