On Fri, Jan 13, 2017 at 11:12:11AM -0800, Jaegeuk Kim wrote: > Previously, I've done to issue discard bios asynchronously. But the problem > that > I've got is that was not enough. When testing nvme SSD with noop IO scheduler, > submit_bio() was blocked at every 8 async discard bios, resulting in very slow > checkpoint process which blocks most of other FS operations.
Where does it block? Are you running out of request? What driver is this on top of?
