On Fri, Mar 12, 2021 at 07:54:13AM +0100, Christoph Hellwig wrote: > So with the new kmap_local interface is it possible / advisable to > use local kmaps over code that might schedule(), e.g. to wait for I/O?
It is possible yes. "Advisable" I think so. Thomas knows better than I what performance would be. FWIW I have been working on converting kmaps to kmap_local. Most of the instances don't schedule AFAICT. What I really don't want to see is any kmap'ings handed to another thread. I am working hard to eliminate the use of kmap for that use. Is that going to be a problem? Ira
