From: Andi Kleen Date: Mon, 28 Apr 2008 09:12:37 +0000 (-0700) Subject: mm: save some bytes in mm_struct by filling holes on 64bit X-Git-Tag: v2.6.26-rc1~980 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7edf85aa3c00df1e86e82f649c41efa0dd8a7218;p=linux-2.6 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index af190ceab9..29adaa781c 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;