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?
