On Sun, May 10, 2020 at 10:25 PM David Rientjes <rientjes@xxxxxxxxxx> wrote: > [...] > The kernel log is not preferred for this (or drop_caches, really) because > the amount of info can causing important information to be lost. We don't > really gain anything by printing that someone manually triggered > compaction; they could just write to the kernel log themselves if they > really wanted to. The reverse is not true: we can't suppress your kernel > message with this patch. > > Instead, a statsfs-like approach could be used to indicate when this has > happened and there is no chance of losing events because it got scrolled > off the kernel log. It has the added benefit of not requiring the entire > log to be parsed for such events. OK, agreed! Let's forget the kernel log. So, do you think the way to go is the statsfs, not a zoneinfo stat, a per-node thing? I'm saying that because kernel mm subsystem statistics seem pretty.."comfortable" the way they are, in files like vmstat, zoneinfo, etc. Let me know your thoughts on this, if I could work on that or should wait statsfs. Thanks, Guilherme
