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[PATCH] mm: mm_struct hiwaters moved

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Slight and timid rearrangement of mm_struct: hiwater_rss and hiwater_vm were
tacked on the end, but it seems better to keep them near _file_rss, _anon_rss
and total_vm, in the same cacheline on those arches verified.

There are likely to be more profitable rearrangements, but less obvious (is it
good or bad that saved_auxv[AT_VECTOR_SIZE] isolates cpu_vm_mask and context
from many others?), needing serious instrumentation.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins 2005-10-29 18:16:19 -07:00 committed by Linus Torvalds
parent 365e9c87a9
commit f449952bc8
1 changed files with 9 additions and 10 deletions
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19
include/linux/sched.h
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@ -291,16 +291,19 @@ struct mm_struct {
* by mmlist_lock * by mmlist_lock
*/ */
unsigned long start_code, end_code, start_data, end_data;
unsigned long start_brk, brk, start_stack;
unsigned long arg_start, arg_end, env_start, env_end;
unsigned long total_vm, locked_vm, shared_vm;
unsigned long exec_vm, stack_vm, reserved_vm, def_flags, nr_ptes;
/* Special counters protected by the page_table_lock */ /* Special counters protected by the page_table_lock */
mm_counter_t _file_rss; mm_counter_t _file_rss;
mm_counter_t _anon_rss; mm_counter_t _anon_rss;
unsigned long hiwater_rss; /* High-watermark of RSS usage */
unsigned long hiwater_vm; /* High-water virtual memory usage */
unsigned long total_vm, locked_vm, shared_vm, exec_vm;
unsigned long stack_vm, reserved_vm, def_flags, nr_ptes;
unsigned long start_code, end_code, start_data, end_data;
unsigned long start_brk, brk, start_stack;
unsigned long arg_start, arg_end, env_start, env_end;
unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */ unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */
unsigned dumpable:2; unsigned dumpable:2;
@ -320,11 +323,7 @@ struct mm_struct {
/* aio bits */ /* aio bits */
rwlock_t ioctx_list_lock; rwlock_t ioctx_list_lock;
struct kioctx *ioctx_list; struct kioctx *ioctx_list;
struct kioctx default_kioctx; struct kioctx default_kioctx;
unsigned long hiwater_rss; /* High-water RSS usage */
unsigned long hiwater_vm; /* High-water virtual memory usage */
}; };
struct sighand_struct { struct sighand_struct {