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Index: head/sys/compat/linprocfs/linprocfs.c
===================================================================
--- head/sys/compat/linprocfs/linprocfs.c
+++ head/sys/compat/linprocfs/linprocfs.c
@@ -1303,6 +1303,21 @@
}
/*
+ * Filler function for proc/sys/vm/min_free_kbytes
+ *
+ * This mirrors the approach in illumos to return zero for reads. Effectively,
+ * it says, no memory is kept in reserve for "atomic allocations". This class
+ * of allocation can be used at times when a thread cannot be suspended.
+ */
+static int
+linprocfs_dominfree(PFS_FILL_ARGS)
+{
+
+ sbuf_printf(sb, "%d\n", 0);
+ return (0);
+}
+
+/*
* Filler function for proc/scsi/device_info
*/
static int
@@ -1562,6 +1577,7 @@
{
struct pfs_node *root;
struct pfs_node *dir;
+ struct pfs_node *sys;
root = pi->pi_root;
@@ -1643,9 +1659,9 @@
NULL, NULL, NULL, PFS_RD);
/* /proc/sys/... */
- dir = pfs_create_dir(root, "sys", NULL, NULL, NULL, 0);
+ sys = pfs_create_dir(root, "sys", NULL, NULL, NULL, 0);
/* /proc/sys/kernel/... */
- dir = pfs_create_dir(dir, "kernel", NULL, NULL, NULL, 0);
+ dir = pfs_create_dir(sys, "kernel", NULL, NULL, NULL, 0);
pfs_create_file(dir, "osrelease", &linprocfs_doosrelease,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(dir, "ostype", &linprocfs_doostype,
@@ -1662,6 +1678,11 @@
/* /proc/sys/kernel/random/... */
dir = pfs_create_dir(dir, "random", NULL, NULL, NULL, 0);
pfs_create_file(dir, "uuid", &linprocfs_douuid,
+ NULL, NULL, NULL, PFS_RD);
+
+ /* /proc/sys/vm/.... */
+ dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0);
+ pfs_create_file(dir, "min_free_kbytes", &linprocfs_dominfree,
NULL, NULL, NULL, PFS_RD);
return (0);

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