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| author | kib <kib@FreeBSD.org> | 2013-01-14 05:46:49 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2013-01-14 05:46:49 +0000 |
| commit | e7565a37f0c93e26b89593d5e6156dc73a235372 (patch) | |
| tree | a3e7d7cc82ccd3412fe020a5552d27f28d302616 /sys/sys/bufobj.h | |
| parent | d10c3cd19615ac20efb595169a245341f0394749 (diff) | |
| download | FreeBSD-src-e7565a37f0c93e26b89593d5e6156dc73a235372.zip FreeBSD-src-e7565a37f0c93e26b89593d5e6156dc73a235372.tar.gz | |
Rearrange the struct bufobj and struct vnode layouts to reduce
padding. On the amd64 kernel with INVARIANTS turned off, size of the
struct vnode is reduced from 496 to 472 bytes, saving 24 bytes of
memory and KVA per vnode.
Noted and reviewed by: peter
Tested by: pho
Sponsored by: The FreeBSD Foundation
Diffstat (limited to 'sys/sys/bufobj.h')
| -rw-r--r-- | sys/sys/bufobj.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/sys/sys/bufobj.h b/sys/sys/bufobj.h index 3934553..79bef84 100644 --- a/sys/sys/bufobj.h +++ b/sys/sys/bufobj.h @@ -89,12 +89,7 @@ struct buf_ops { struct bufobj { struct mtx bo_mtx; /* Mutex which protects "i" things */ - struct bufv bo_clean; /* i Clean buffers */ - struct bufv bo_dirty; /* i Dirty buffers */ - long bo_numoutput; /* i Writes in progress */ - u_int bo_flag; /* i Flags */ struct buf_ops *bo_ops; /* - Buffer operations */ - int bo_bsize; /* - Block size for i/o */ struct vm_object *bo_object; /* v Place to store VM object */ LIST_ENTRY(bufobj) bo_synclist; /* S dirty vnode list */ void *bo_private; /* private pointer */ @@ -103,6 +98,11 @@ struct bufobj { * XXX: only to keep the syncer working * XXX: for now. */ + struct bufv bo_clean; /* i Clean buffers */ + struct bufv bo_dirty; /* i Dirty buffers */ + long bo_numoutput; /* i Writes in progress */ + u_int bo_flag; /* i Flags */ + int bo_bsize; /* - Block size for i/o */ }; /* |
