Messages in this thread Patch in this message |  | | Subject | [RFC] HZ entry in /proc/sys/kernel | From | Grzegorz Jaskiewicz <> | Date | 26 May 2003 12:53:52 +0100 |
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I have seen few scripts allready that are assuming HZ==100. Afaik this value is different in 2.5/2.4 for the same arch. So is it worth to add on both simple /proc/sys/kernel/HZ ?
Simple patch for 2.4.21-rc3 , if it is allright i will do same thing for 2.5
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diff -ur 2/include/linux/sysctl.h 1/include/linux/sysctl.h --- 2/include/linux/sysctl.h 2003-05-24 12:10:35.000000000 +0100 +++ 1/include/linux/sysctl.h 2003-05-26 12:44:16.000000000 +0100 @@ -125,6 +125,7 @@ KERN_TAINTED=53, /* int: various kernel tainted flags */ KERN_CADPID=54, /* int: PID of the process to notify on CAD */ KERN_CORE_PATTERN=56, /* string: pattern for core-files */ + KERN_HZ=57, /* int: HZ value */ };
diff -ur 2/kernel/sysctl.c 1/kernel/sysctl.c --- 2/kernel/sysctl.c 2003-05-26 12:33:37.000000000 +0100 +++ 1/kernel/sysctl.c 2003-05-26 12:45:31.000000000 +0100 @@ -32,6 +32,7 @@ #include <linux/highuid.h>
#include <asm/uaccess.h> +#include <asm/param.h>
#ifdef CONFIG_ROOT_NFS #include <linux/nfs_fs.h> @@ -123,6 +124,8 @@
#ifdef CONFIG_PROC_FS
+static unsigned int hz=HZ; + static ssize_t proc_readsys(struct file *, char *, size_t, loff_t *); static ssize_t proc_writesys(struct file *, const char *, size_t, loff_t *); static int proc_sys_permission(struct inode *, int); @@ -244,6 +247,8 @@ 0600, NULL, &proc_dointvec}, {KERN_MAX_THREADS, "threads-max", &max_threads, sizeof(int), 0644, NULL, &proc_dointvec}, + {KERN_HZ, "HZ", &hz, sizeof(unsigned int), + 0444, NULL, &proc_dointvec}, {KERN_RANDOM, "random", NULL, 0, 0555, random_table}, {KERN_OVERFLOWUID, "overflowuid", &overflowuid, sizeof(int), 0644, NULL, &proc_dointvec_minmax, &sysctl_intvec, NULL,
-- Grzegorz Jaskiewicz <gj@pointblue.com.pl> K4 labs
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