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authorAndi Kleen <ak@suse.de>2008-04-28 02:12:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:20 -0700
commit7edf85aa3c00df1e86e82f649c41efa0dd8a7218 (patch)
tree9f6ee8e78076a55031642a1660ce9e1760ad79fb
parentb5ee5befa75e33e55d34584ad10286c5005cb1de (diff)
mm: save some bytes in mm_struct by filling holes on 64bit
Save some bytes in mm_struct by filling holes Putting int values together for better packing on 64bit shrinks sizeof(struct mm_struct) from 776 bytes to 764 bytes. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/mm_types.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index af190ceab97..29adaa781cb 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -172,6 +172,7 @@ struct mm_struct {
atomic_t mm_users; /* How many users with user space? */
atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
int map_count; /* number of VMAs */
+ int core_waiters;
struct rw_semaphore mmap_sem;
spinlock_t page_table_lock; /* Protects page tables and some counters */
@@ -216,11 +217,10 @@ struct mm_struct {
unsigned long flags; /* Must use atomic bitops to access the bits */
/* coredumping support */
- int core_waiters;
struct completion *core_startup_done, core_done;
/* aio bits */
- rwlock_t ioctx_list_lock;
+ rwlock_t ioctx_list_lock; /* aio lock */
struct kioctx *ioctx_list;
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
struct mem_cgroup *mem_cgroup;