On Fri, May 21, 2021 at 10:36:35AM +0200, Christoph Hellwig wrote: > On Fri, May 21, 2021 at 04:35:03PM +0800, Ming Lei wrote: > > Just wondering why the ioend isn't submitted out after it becomes full? > > block layer plugging? Although failing bio allocations will kick that, > so that is not a deadlock risk. These ioends are just added to one list stored on local stack variable(submit_list), how can block layer plugging observe & submit them out? Chained bios have been submitted already, but all can't be completed/freed until the whole ioend is done, that submission won't make forward progress. Thanks, Ming
