On Wed, Jul 20, 2022 at 06:02:32AM +0000, CGEL wrote: > For example, some systems will create a lot of pagecache when boot up > while reading bzImage, ramdisk, docker images etc. Most of this pagecache > is useless after boot up. It may has a longterm negative effects for the > workload when trigger page reclaim. It is especially harmful when trigger > direct_reclaim or we need allocate pages in atomic context. So users may > chose to drop_caches after boot up. It is purely a debug interface. If you want to drop specific page cache that needs to be done through madvise.
