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? Provide a kernel boot parameter to alter the default setting. Userspace can then restore the usual value later in boot?
