According to Documentation/admin-guide/sysctl/fs.rst, fs.nr_open and fs.file-max represent the number of file-handles that can be opened by each process and the entire system, respectively. Therefore, it's necessary to maintain a relative size between them, meaning we should ensure that files_stat.max_files is not less than sysctl_nr_open. However, this point is overlooked in the current kernel code, and this patchset aims to rectify this. Additionally, patch 0001 fixes the type issue with the sysctl_nr_open handler. Jinliang Zheng (6): fs: fix proc_handler for sysctl_nr_open fs: make files_stat globally visible sysctl: refactor __do_proc_doulongvec_minmax() sysctl: ensure files_stat.max_files is not less than sysctl_nr_open sysctl: ensure sysctl_nr_open is not greater than files_stat.max_files fs: synchronize the access of fs.file-max and fs.nr_open fs/file_table.c | 15 ++++++++--- include/linux/fs.h | 2 ++ include/linux/sysctl.h | 4 +++ kernel/sysctl.c | 59 ++++++++++++++++++++++++++++++++++++++---- 4 files changed, 71 insertions(+), 9 deletions(-) -- 2.41.1
