lkml.org 
[lkml]   [2005]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 07/21] mm: mm_struct hiwaters moved
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>
---
include/linux/sched.h | 19 +++++++++----------
1 files changed, 9 insertions(+), 10 deletions(-)
--- mm06/include/linux/sched.h 2005-10-11 23:54:33.000000000 +0100
+++ mm07/include/linux/sched.h 2005-10-11 23:55:22.000000000 +0100
@@ -280,16 +280,19 @@ struct mm_struct {
* 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 */
mm_counter_t _file_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 dumpable:2;
@@ -309,11 +312,7 @@ struct mm_struct {
/* aio bits */
rwlock_t ioctx_list_lock;
struct kioctx *ioctx_list;
-
struct kioctx default_kioctx;
-
- unsigned long hiwater_rss; /* High-water RSS usage */
- unsigned long hiwater_vm; /* High-water virtual memory usage */
};

struct sighand_struct {
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-10-13 02:55    [from the cache]
©2003-2011 Jasper Spaans