diff options
| -rw-r--r-- | examples/kernel-patches/2.4.x-revert-sysinfo.patch | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/examples/kernel-patches/2.4.x-revert-sysinfo.patch b/examples/kernel-patches/2.4.x-revert-sysinfo.patch deleted file mode 100644 index c7cd5a7..0000000 --- a/examples/kernel-patches/2.4.x-revert-sysinfo.patch +++ /dev/null @@ -1,77 +0,0 @@ -I have a version of free I wrote for BusyBox that uses sysinfo (rather then -/proc) to get its information. Under 2.2.x it reports normal stuff, i.e. - [andersen@dillweed busybox]$ ./free - total used free shared buffers - Mem: 127800 124268 3532 16956 7544 - Swap: 128516 13584 114932 - Total: 256316 137852 118464 - -while under 2.2.0-test1-ac7 it reports wierd numbers (~ #/4096) - [andersen@dillweed busybox]$ ./free - total used free shared buffers - Mem: 30 11 19 0 1 - Swap: 31 0 31 - Total: 61 11 50 - -After investigating the problem, it turns out that somewhere during 2.3.x the -values for memory stored in struct sysinfo changed from being stored as bytes -to being units of PAGE_SIZE, but kernel/info.c was never updated to reflect -this change in definition. - -Breaking free isn't that big of a deal, but I also use sysinfo in init to check -that the box has enough ram from within the init process (and no, mounting -/proc from within init and reading /proc/meminfo is not a good solution. -BusyBox is often used in embedded systems where /proc is not compiled in). - -The following patch reinstates the traditional sysinfo(2) interface by -returning bytes (not units of PAGE_SIZE) for memory values. - -An additional patch suggestion (not included here) would be to eliminate the -supurfluous "mem_unit" variable from struct_sysinfo in include/linux/kernel.h -and arch/*/mm/init.c. - - -Erik - --- -Erik B. Andersen Web: http://www.xmission.com/~andersen/ - email: andersee@debian.org ---This message was written using 73% post-consumer electrons-- - ---- linux/kernel/info.c.orig Mon Aug 23 12:15:53 1999 -+++ linux/kernel/info.c Sun Jun 4 01:13:11 2000 -@@ -2,6 +2,8 @@ - * linux/kernel/info.c - * - * Copyright (C) 1992 Darren Senn -+ * Fixed to once again return bytes instead of page counts, -+ * June 2000, by Erik Andersen <andersee@debian.org> - */ - - /* This implements the sysinfo() system call */ -@@ -10,7 +12,6 @@ - #include <linux/unistd.h> - #include <linux/swap.h> - #include <linux/smp_lock.h> -- - #include <asm/uaccess.h> - - asmlinkage long sys_sysinfo(struct sysinfo *info) -@@ -31,6 +32,17 @@ - - si_meminfo(&val); - si_swapinfo(&val); -+ -+ /* These are in units of PAGE_SIZE, but this interface -+ * has always returned bytes. Make it return bytes */ -+ val.totalram*=PAGE_SIZE; -+ val.freeram*=PAGE_SIZE; -+ val.sharedram*=PAGE_SIZE; -+ val.bufferram*=PAGE_SIZE; -+ val.totalswap*=PAGE_SIZE; -+ val.freeswap*=PAGE_SIZE; -+ val.totalhigh*=PAGE_SIZE; -+ val.freehigh*=PAGE_SIZE; - - if (copy_to_user(info, &val, sizeof(struct sysinfo))) - return -EFAULT; - |