CHROMIUM: vmscan: add min_filelist_kbytes sysctl for protecting the working set

kernel/sysctl.c

 /*
  * sysctl.c: General linux system control interface
  *
  * Begun 24 March 1995, Stephen Tweedie
  * Added /proc support, Dec 1995
  * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
  * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
  * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
  * Dynamic registration fixes, Stephen Tweedie.
  * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
@@ skipping 1406 matching lines @@
                 .procname       = "memory_failure_recovery",
                 .data           = &sysctl_memory_failure_recovery,
                 .maxlen         = sizeof(sysctl_memory_failure_recovery),
                 .mode           = 0644,
                 .proc_handler   = &proc_dointvec_minmax,
                 .strategy       = &sysctl_intvec,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
 #endif
+        {
+                .ctl_name       = CTL_UNNUMBERED,
+                .procname       = "min_filelist_kbytes",
+                .data           = &min_filelist_kbytes,
+                .maxlen         = sizeof(min_filelist_kbytes),
+                .mode           = 0644,
+                .proc_handler   = &proc_dointvec,
+                .strategy       = &sysctl_intvec,
+                .extra1         = &zero,
+        },
 
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
  */
         { .ctl_name = 0 }
 };
 
 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
 static struct ctl_table binfmt_misc_table[] = {
@@ skipping 1812 matching lines @@
 EXPORT_SYMBOL(proc_doulongvec_minmax);
 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
 EXPORT_SYMBOL(register_sysctl_table);
 EXPORT_SYMBOL(register_sysctl_paths);
 EXPORT_SYMBOL(sysctl_intvec);
 EXPORT_SYMBOL(sysctl_jiffies);
 EXPORT_SYMBOL(sysctl_ms_jiffies);
 EXPORT_SYMBOL(sysctl_string);
 EXPORT_SYMBOL(sysctl_data);
 EXPORT_SYMBOL(unregister_sysctl_table);