[Cc linux-kernel]
Hello, On (11/02/16 10:06), Joe Perches wrote: > Hello all. > > Can you please post notes for whatever is proposed here somewhere? we covered 4 topics: #1 deadlocks and recursion in printk discussion outcome: I published an updated printk_safe patch last week (addresses recursion problems in printk). there was no strong opposition, and we agreed that per-cpu buffers can help us out. discussion outcome: we agreed that deadlocks in printk must be addressed via printk indirection. basically printk() will behave the same way as printk_deferred() and, thus, we can, at some point, remove printk_deferred(). #2 async printk discussion outcome: we agreed to offload printing duty to a special printk kthread. #3 pr_cont discussion outcome: out of "problems" list. no work will be done in this area. #4 console semaphore discussion outcome: we agreed that we can do better here and that it makes sense to do what's been proposed in my slides. but, I keep it as a low priority. frankly. I'd be happy to see #1-#3 in the mainline in 9-12 months. not because it's such an enormesoly hard thing to do, but because we probably would want to introduce those changes iteratively, in different releases. p.s. I uploaded "some sort" of slides to http://www.slideshare.net/SergeySENOZHATSKY/printk-considered-harmful -ss
