From: Gu Bowen <gubowen5@huawei.com> hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICA1GK -------------------------------- Add kfuncs to retrieve the number of some sorts of memory pages. Signed-off-by: Gu Bowen <gubowen5@huawei.com> --- fs/proc/meminfo.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 57a431c1130b..d9a89d254274 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -19,6 +19,10 @@ #endif #include <linux/zswap.h> #include <linux/dynamic_pool.h> +#ifdef CONFIG_BPF_RVI +#include <linux/btf.h> +#include <linux/btf_ids.h> +#endif #include <asm/page.h> #include "internal.h" @@ -176,6 +180,42 @@ static int meminfo_proc_show(struct seq_file *m, void *v) return 0; } +#ifdef CONFIG_BPF_RVI +__bpf_kfunc unsigned long bpf_mem_file_hugepage(void) +{ + return global_node_page_state(NR_FILE_THPS); +} + +__bpf_kfunc unsigned long bpf_mem_file_pmdmapped(void) +{ + return global_node_page_state(NR_FILE_PMDMAPPED); +} + +__bpf_kfunc unsigned long bpf_mem_kreclaimable(void) +{ + return global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B) + + global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE); +} + +BTF_SET8_START(bpf_fs_meminfo_kfunc_ids) +BTF_ID_FLAGS(func, bpf_mem_file_hugepage) +BTF_ID_FLAGS(func, bpf_mem_file_pmdmapped) +BTF_ID_FLAGS(func, bpf_mem_kreclaimable) +BTF_SET8_END(bpf_fs_meminfo_kfunc_ids) + +static const struct btf_kfunc_id_set bpf_fs_meminfo_kfunc_set = { + .owner = THIS_MODULE, + .set = &bpf_fs_meminfo_kfunc_ids, +}; + +static int __init bpf_fs_meminfo_kfunc_init(void) +{ + return register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, + &bpf_fs_meminfo_kfunc_set); +} +late_initcall(bpf_fs_meminfo_kfunc_init); +#endif + static int __init proc_meminfo_init(void) { struct proc_dir_entry *pde; -- 2.25.1