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diff -ur linux-2.2.18-orig/include/linux/sysctl.h linux-2.2.18/include/linux/sysctl.h
--- linux-2.2.18-orig/include/linux/sysctl.h Sun Dec 10 18:49:44 2000
+++ linux-2.2.18/include/linux/sysctl.h Tue Jan 30 16:42:20 2001
@@ -123,7 +123,8 @@
VM_PAGECACHE=7, /* struct: Set cache memory thresholds */
VM_PAGERDAEMON=8, /* struct: Control kswapd behaviour */
VM_PGT_CACHE=9, /* struct: Set page table cache parameters */
- VM_PAGE_CLUSTER=10 /* int: set number of pages to swap together */
+ VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
+ VM_MAX_MAP_COUNT=11 /* int: max number mappings per process */
};
diff -ur linux-2.2.18-orig/kernel/sysctl.c linux-2.2.18/kernel/sysctl.c
--- linux-2.2.18-orig/kernel/sysctl.c Sun Dec 10 18:49:44 2000
+++ linux-2.2.18/kernel/sysctl.c Tue Jan 30 16:42:20 2001
@@ -37,6 +37,7 @@
extern int bdf_prm[], bdflush_min[], bdflush_max[];
extern char binfmt_java_interpreter[], binfmt_java_appletviewer[];
extern int sysctl_overcommit_memory;
+extern int sysctl_max_map_count;
extern int nr_queued_signals, max_queued_signals;
#ifdef CONFIG_KMOD
@@ -272,6 +273,8 @@
&pgt_cache_water, 2*sizeof(int), 0600, NULL, &proc_dointvec},
{VM_PAGE_CLUSTER, "page-cluster",
&page_cluster, sizeof(int), 0600, NULL, &proc_dointvec},
+ {VM_MAX_MAP_COUNT, "max_map_count",
+ &sysctl_max_map_count, sizeof(int), 0644, NULL, &proc_dointvec},
{0}
};
diff -ur linux-2.2.18-orig/mm/mmap.c linux-2.2.18/mm/mmap.c
--- linux-2.2.18-orig/mm/mmap.c Sun Dec 10 18:49:44 2000
+++ linux-2.2.18/mm/mmap.c Tue Jan 30 16:42:20 2001
@@ -40,6 +40,7 @@
kmem_cache_t *vm_area_cachep;
int sysctl_overcommit_memory;
+int sysctl_max_map_count = MAX_MAP_COUNT;
/* Check that a process has enough memory to allocate a
* new virtual mapping.
@@ -190,7 +191,7 @@
return -EINVAL;
/* Too many mappings? */
- if (mm->map_count > MAX_MAP_COUNT)
+ if (mm->map_count > sysctl_max_map_count)
return -ENOMEM;
/* mlock MCL_FUTURE? */
@@ -632,7 +633,7 @@
/* If we'll make "hole", check the vm areas limit */
if ((mpnt->vm_start < addr && mpnt->vm_end > addr+len)
- && mm->map_count >= MAX_MAP_COUNT)
+ && mm->map_count >= sysctl_max_map_count)
return -ENOMEM;
/*
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