From: Hugh Dickins <hugh@veritas.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 07/21] mm: mm_struct hiwaters moved
Date: Thu, 13 Oct 2005 01:52:19 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.61.0510130150580.4060@goblin.wat.veritas.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0510130143240.4060@goblin.wat.veritas.com>
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 {
next prev parent reply other threads:[~2005-10-13 0:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-13 0:44 [PATCH 00/21] mm: page fault scalability nearer Hugh Dickins
2005-10-13 0:45 ` [PATCH 01/21] mm: copy_one_pte inc rss Hugh Dickins
2005-10-13 0:46 ` [PATCH 02/21] mm: zap_pte_range dec rss Hugh Dickins
2005-10-13 0:47 ` [PATCH 03/21] mm: do_swap_page race major Hugh Dickins
2005-10-13 0:47 ` [PATCH 04/21] mm: do_mremap current mm Hugh Dickins
2005-10-13 0:48 ` [PATCH 05/21] mm: zap_pte out of line Hugh Dickins
2005-10-13 0:50 ` [PATCH 06/21] mm: update_hiwaters just in time Hugh Dickins
2005-10-13 1:17 ` Christoph Lameter
2005-10-13 19:18 ` Jay Lan
2005-10-13 0:52 ` Hugh Dickins [this message]
2005-10-13 0:53 ` [PATCH 08/21] mm: ia64 use expand_upwards Hugh Dickins
2005-10-13 0:55 ` [PATCH 09/21] mm: init_mm without ptlock Hugh Dickins
2005-10-13 0:55 ` [PATCH 10/21] mm: ptd_alloc inline and out Hugh Dickins
2005-10-13 0:56 ` [PATCH 11/21] mm: ptd_alloc take ptlock Hugh Dickins
2005-10-13 0:59 ` [PATCH 12/21] mm: arches skip ptlock Hugh Dickins
2005-10-13 1:13 ` [PATCH 13/21] mm: page fault handler locking Hugh Dickins
2005-10-13 1:14 ` [PATCH 14/21] mm: pte_offset_map_lock loops Hugh Dickins
2005-10-13 1:16 ` [PATCH 15/21] mm: flush_tlb_range outside ptlock Hugh Dickins
2005-10-13 1:17 ` [PATCH 16/21] mm: unlink vma before pagetables Hugh Dickins
2005-10-13 1:18 ` [PATCH 17/21] mm: unmap_vmas with inner ptlock Hugh Dickins
2005-10-13 1:20 ` [PATCH 18/21] mm: xip_unmap ZERO_PAGE fix Hugh Dickins
2005-10-13 12:39 ` Carsten Otte
2005-10-13 1:21 ` [PATCH 19/21] mm: rmap with inner ptlock Hugh Dickins
2005-10-13 1:22 ` [PATCH 20/21] mm: kill check_user_page_readable Hugh Dickins
2005-10-13 1:23 ` [PATCH 21/21] mm: follow_page with inner ptlock Hugh Dickins
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