Commit a074f680 authored by Christoph Hellwig's avatar Christoph Hellwig

VM: remove unused /proc/sys/vm/kswapd and swapctl.h

These were totally unused for a long time.  It's interesting how
many files include swapctl.h, though..
parent ff42067b
...@@ -16,7 +16,6 @@ Default values and initialization routines for most of these ...@@ -16,7 +16,6 @@ Default values and initialization routines for most of these
files can be found in mm/swap.c. files can be found in mm/swap.c.
Currently, these files are in /proc/sys/vm: Currently, these files are in /proc/sys/vm:
- kswapd
- overcommit_memory - overcommit_memory
- page-cluster - page-cluster
- dirty_async_ratio - dirty_async_ratio
...@@ -34,39 +33,6 @@ See Documentation/filesystems/proc.txt ...@@ -34,39 +33,6 @@ See Documentation/filesystems/proc.txt
============================================================== ==============================================================
kswapd:
Kswapd is the kernel swapout daemon. That is, kswapd is that
piece of the kernel that frees memory when it gets fragmented
or full. Since every system is different, you'll probably want
some control over this piece of the system.
The numbers in this page correspond to the numbers in the
struct pager_daemon {tries_base, tries_min, swap_cluster
}; The tries_base and swap_cluster probably have the
largest influence on system performance.
tries_base The maximum number of pages kswapd tries to
free in one round is calculated from this
number. Usually this number will be divided
by 4 or 8 (see mm/vmscan.c), so it isn't as
big as it looks.
When you need to increase the bandwidth to/from
swap, you'll want to increase this number.
tries_min This is the minimum number of times kswapd
tries to free a page each time it is called.
Basically it's just there to make sure that
kswapd frees some pages even when it's being
called with minimum priority.
swap_cluster This is the number of pages kswapd writes in
one turn. You want this large so that kswapd
does it's I/O in large chunks and the disk
doesn't have to seek often, but you don't want
it to be too large since that would flood the
request queue.
==============================================================
overcommit_memory: overcommit_memory:
This value contains a flag that enables memory overcommitment. This value contains a flag that enables memory overcommitment.
......
...@@ -18,7 +18,6 @@ ...@@ -18,7 +18,6 @@
#include <linux/mman.h> #include <linux/mman.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/bootmem.h> #include <linux/bootmem.h>
......
...@@ -24,7 +24,6 @@ ...@@ -24,7 +24,6 @@
#include <linux/bootmem.h> #include <linux/bootmem.h>
#include <linux/highmem.h> #include <linux/highmem.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#ifdef CONFIG_BLK_DEV_INITRD #ifdef CONFIG_BLK_DEV_INITRD
#include <linux/blk.h> #include <linux/blk.h>
#endif #endif
......
...@@ -21,7 +21,6 @@ ...@@ -21,7 +21,6 @@
#include <linux/bootmem.h> #include <linux/bootmem.h>
#include <linux/highmem.h> #include <linux/highmem.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#ifdef CONFIG_BLK_DEV_INITRD #ifdef CONFIG_BLK_DEV_INITRD
#include <linux/blk.h> #include <linux/blk.h>
#endif #endif
......
...@@ -18,7 +18,6 @@ ...@@ -18,7 +18,6 @@
#include <linux/mman.h> #include <linux/mman.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#ifdef CONFIG_BLK_DEV_INITRD #ifdef CONFIG_BLK_DEV_INITRD
#include <linux/blk.h> #include <linux/blk.h>
#endif #endif
......
...@@ -15,7 +15,6 @@ ...@@ -15,7 +15,6 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/blk.h> #include <linux/blk.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/seq_file.h> #include <linux/seq_file.h>
......
...@@ -15,7 +15,6 @@ ...@@ -15,7 +15,6 @@
#include <linux/time.h> #include <linux/time.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/sysctl.h> #include <linux/sysctl.h>
#include <linux/swapctl.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/stat.h> #include <linux/stat.h>
......
...@@ -8,7 +8,6 @@ ...@@ -8,7 +8,6 @@
#include <linux/time.h> #include <linux/time.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/sysctl.h> #include <linux/sysctl.h>
#include <linux/swapctl.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
......
#ifndef _LINUX_SWAPCTL_H
#define _LINUX_SWAPCTL_H
typedef struct pager_daemon_v1
{
unsigned int tries_base;
unsigned int tries_min;
unsigned int swap_cluster;
} pager_daemon_v1;
typedef pager_daemon_v1 pager_daemon_t;
extern pager_daemon_t pager_daemon;
#endif /* _LINUX_SWAPCTL_H */
...@@ -136,12 +136,12 @@ enum ...@@ -136,12 +136,12 @@ enum
VM_UNUSED1=1, /* was: struct: Set vm swapping control */ VM_UNUSED1=1, /* was: struct: Set vm swapping control */
VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */ VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
VM_UNUSED3=3, /* was: struct: Set free page thresholds */ VM_UNUSED3=3, /* was: struct: Set free page thresholds */
VM_BDFLUSH_UNUSED=4, /* Spare */ VM_UNUSED4=4, /* Spare */
VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */ VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
VM_UNUSED4=6, /* was: struct: Set buffer memory thresholds */ VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
VM_UNUSED5=7, /* was: struct: Set cache memory thresholds */ VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
VM_PAGERDAEMON=8, /* struct: Control kswapd behaviour */ VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
VM_UNUSED6=9, /* was: struct: Set page table cache parameters */ VM_UNUSED9=9, /* was: 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_DIRTY_BACKGROUND=11, /* dirty_background_ratio */ VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
VM_DIRTY_ASYNC=12, /* dirty_async_ratio */ VM_DIRTY_ASYNC=12, /* dirty_async_ratio */
......
...@@ -36,7 +36,6 @@ ...@@ -36,7 +36,6 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/swapctl.h>
#include <linux/suspend.h> #include <linux/suspend.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/file.h> #include <linux/file.h>
......
...@@ -22,7 +22,6 @@ ...@@ -22,7 +22,6 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/sysctl.h> #include <linux/sysctl.h>
#include <linux/swapctl.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/ctype.h> #include <linux/ctype.h>
#include <linux/utsname.h> #include <linux/utsname.h>
...@@ -272,8 +271,6 @@ static ctl_table vm_table[] = { ...@@ -272,8 +271,6 @@ static ctl_table vm_table[] = {
{VM_OVERCOMMIT_RATIO, "overcommit_ratio", {VM_OVERCOMMIT_RATIO, "overcommit_ratio",
&sysctl_overcommit_ratio, sizeof(sysctl_overcommit_ratio), 0644, &sysctl_overcommit_ratio, sizeof(sysctl_overcommit_ratio), 0644,
NULL, &proc_dointvec}, NULL, &proc_dointvec},
{VM_PAGERDAEMON, "kswapd",
&pager_daemon, sizeof(pager_daemon_t), 0644, NULL, &proc_dointvec},
{VM_PAGE_CLUSTER, "page-cluster", {VM_PAGE_CLUSTER, "page-cluster",
&page_cluster, sizeof(int), 0644, NULL, &proc_dointvec}, &page_cluster, sizeof(int), 0644, NULL, &proc_dointvec},
{VM_DIRTY_BACKGROUND, "dirty_background_ratio", {VM_DIRTY_BACKGROUND, "dirty_background_ratio",
......
...@@ -12,7 +12,6 @@ ...@@ -12,7 +12,6 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/bootmem.h> #include <linux/bootmem.h>
......
...@@ -41,7 +41,6 @@ ...@@ -41,7 +41,6 @@
#include <linux/mman.h> #include <linux/mman.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/swapctl.h>
#include <linux/iobuf.h> #include <linux/iobuf.h>
#include <linux/highmem.h> #include <linux/highmem.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
......
...@@ -11,7 +11,6 @@ ...@@ -11,7 +11,6 @@
#include <linux/mman.h> #include <linux/mman.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/file.h> #include <linux/file.h>
......
...@@ -18,7 +18,6 @@ ...@@ -18,7 +18,6 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/timex.h> #include <linux/timex.h>
/* #define DEBUG */ /* #define DEBUG */
......
...@@ -16,7 +16,6 @@ ...@@ -16,7 +16,6 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/init.h> #include <linux/init.h>
...@@ -27,12 +26,6 @@ ...@@ -27,12 +26,6 @@
/* How many pages do we try to swap or page in/out together? */ /* How many pages do we try to swap or page in/out together? */
int page_cluster; int page_cluster;
pager_daemon_t pager_daemon = {
512, /* base number for calculating the number of tries */
SWAP_CLUSTER_MAX, /* minimum number of tries */
8, /* do swap I/O in clusters of this size */
};
/* /*
* Move an inactive page to the active list. * Move an inactive page to the active list.
*/ */
......
...@@ -10,7 +10,6 @@ ...@@ -10,7 +10,6 @@
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
......
...@@ -10,7 +10,6 @@ ...@@ -10,7 +10,6 @@
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/namei.h> #include <linux/namei.h>
......
...@@ -15,7 +15,6 @@ ...@@ -15,7 +15,6 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/swap.h> #include <linux/swap.h>
#include <linux/swapctl.h>
#include <linux/smp_lock.h> #include <linux/smp_lock.h>
#include <linux/pagemap.h> #include <linux/pagemap.h>
#include <linux/init.h> #include <linux/init.h>
......
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