diff options
| author | Dmitry Chagin <dchagin@FreeBSD.org> | 2022-05-31 08:42:06 +0000 |
|---|---|---|
| committer | Dmitry Chagin <dchagin@FreeBSD.org> | 2022-06-17 19:35:41 +0000 |
| commit | b3c809b96f778dad3c1b385d2f772c0944b8b47b (patch) | |
| tree | 7d7185f5794a8505a9a7ef77767cac559cdb319c /sys/compat/linprocfs/linprocfs.c | |
| parent | d37548e01059f7cff3b88bebe894b7519b7fd1e6 (diff) | |
linprocfs: Add /proc/vm/max_map_count
On Linux this limits the number of maps per mm struct.
We don't limit mappings, return a suitable large value.
Reviewed by: emaste
Differential revision: https://reviews.freebsd.org/D35351
MFC after: 2 weeks
(cherry picked from commit 7e2a451119373b7d3f2b3fd062d4ccb099dde022)
Diffstat (limited to 'sys/compat/linprocfs/linprocfs.c')
| -rw-r--r-- | sys/compat/linprocfs/linprocfs.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/compat/linprocfs/linprocfs.c b/sys/compat/linprocfs/linprocfs.c index e1cc3289ce99..6cf25350d9e8 100644 --- a/sys/compat/linprocfs/linprocfs.c +++ b/sys/compat/linprocfs/linprocfs.c @@ -1979,6 +1979,21 @@ linprocfs_do_oom_score_adj(PFS_FILL_ARGS) } /* + * Filler function for proc/sys/vm/max_map_count + * + * Maximum number of active map areas, on Linux this limits the number + * of vmaps per mm struct. We don't limit mappings, return a suitable + * large value. + */ +static int +linprocfs_domax_map_cnt(PFS_FILL_ARGS) +{ + + sbuf_printf(sb, "%d\n", INT32_MAX); + return (0); +} + +/* * Constructor */ static int @@ -2122,6 +2137,8 @@ linprocfs_init(PFS_INIT_ARGS) dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0); pfs_create_file(dir, "min_free_kbytes", &linprocfs_dominfree, NULL, NULL, NULL, PFS_RD); + pfs_create_file(dir, "max_map_count", &linprocfs_domax_map_cnt, + NULL, NULL, NULL, PFS_RD); return (0); } |