On Sat, Aug 15, 2020 at 12:15 PM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, 14 Aug 2020 13:10:34 -0700 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > On Fri, 14 Aug 2020 17:03:44 +0800 Zhaoyang Huang <huangzhaoyang@xxxxxxxxx> wrote: > > > > > Some system(like android) will turbo read during startup via expanding the > > > readahead window and then set it back to normal(128kb as usual). However, some > > > files in the system process context will keep to be opened since it is opened > > > up and has no chance to sync with the updated value as it is almost impossible > > > to change the files attached to the inode(processes are unaware of these things) > > > > How about making VM_READAHEAD_PAGES a variable? > > Or make it settable in Kconfig? I don't think so. The scenario I gave before is a dynamic process, can't be solved via menuconfig thing.
