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
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@ -1978,6 +1978,21 @@ linprocfs_do_oom_score_adj(PFS_FILL_ARGS)
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return (0);
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}
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/*
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* Filler function for proc/sys/vm/max_map_count
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*
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* Maximum number of active map areas, on Linux this limits the number
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* of vmaps per mm struct. We don't limit mappings, return a suitable
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* large value.
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*/
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static int
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linprocfs_domax_map_cnt(PFS_FILL_ARGS)
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{
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sbuf_printf(sb, "%d\n", INT32_MAX);
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return (0);
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}
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/*
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* Constructor
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*/
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@ -2122,6 +2137,8 @@ linprocfs_init(PFS_INIT_ARGS)
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dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0);
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pfs_create_file(dir, "min_free_kbytes", &linprocfs_dominfree,
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NULL, NULL, NULL, PFS_RD);
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pfs_create_file(dir, "max_map_count", &linprocfs_domax_map_cnt,
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NULL, NULL, NULL, PFS_RD);
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return (0);
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}
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