On Mon, Jan 16, 2017 at 09:32:20AM -0800, Christoph Hellwig wrote: > 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? Ping? I'm currently spending a lot of effort on fs and block dіscard code, and I'd like to make sure we get common infrastructure instead of local hacks.
