Commit f449952b authored by Hugh Dickins's avatar Hugh Dickins Committed by Linus Torvalds
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[PATCH] 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: default avatarHugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 365e9c87

include/linux/sched.h

+9 −10
Original line number Diff line number Diff line
@@ -291,16 +291,19 @@ 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;
@@ -320,11 +323,7 @@ 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 {

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