On Thu, Dec 29, 2022 at 04:51:37PM +0000, Matthew Wilcox wrote: > The mmap_lock is taken for many, many things. [snip] I am currently describing the use of this lock (for 6.0) in the book and it is striking just how broadly it's used. I'm diagramming it out for 'core' users, i.e. non-driver and non-some other things, but even constraining that leaves a HUGE number of users. I've also documented the 'unexpected' uses of the page_table_lock, which seems to have been significantly improved over time but still a few cases remain! Am happy to give you (+ anybody else on MAINTAINERS list) an early copy of the relevant bit (once I've finished the diagrams anyway) if that'd be helpful! Now if you guys could stop obsoleting my work that'd be great ;)
