pipe: set lower and upper limit on max pages in the pipe page array

[linux-2.6-block.git] / kernel / sysctl.c

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 90f536d846439439593af5f85c92bace046c611e..7742d27e08f285aeacd25e5434206ab5a0483ba9 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -52,6 +52,7 @@
 #include <linux/slow-work.h>
 #include <linux/perf_event.h>
 #include <linux/kprobes.h>
+#include <linux/pipe_fs_i.h>
 
 #include <asm/uaccess.h>
 #include <asm/processor.h>
@@ -1423,6 +1424,14 @@ static struct ctl_table fs_table[] = {
                .child          = binfmt_misc_table,
        },
 #endif
+       {
+               .procname       = "pipe-max-pages",
+               .data           = &pipe_max_pages,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec_minmax,
+               .extra1         = &two,
+       },
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt