diff options
| author | alc <alc@FreeBSD.org> | 2002-05-06 05:45:57 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2002-05-06 05:45:57 +0000 |
| commit | d60a525036422ccbba23ce156a0a31a69aa7ebbb (patch) | |
| tree | 8750eed2fb1169b9dac9c1c7e15f630aca3a5177 /sys/vm/vm_object.c | |
| parent | bfe0870a5677e80b9c46e2321657e424a6a20614 (diff) | |
| download | FreeBSD-src-d60a525036422ccbba23ce156a0a31a69aa7ebbb.zip FreeBSD-src-d60a525036422ccbba23ce156a0a31a69aa7ebbb.tar.gz | |
o Condition the compilation and use of vm_freeze_copyopts()
on ENABLE_VFS_IOOPT.
Diffstat (limited to 'sys/vm/vm_object.c')
| -rw-r--r-- | sys/vm/vm_object.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index e6da475..352ad2f 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -401,7 +401,9 @@ vm_object_vndeallocate(vm_object_t object) object->ref_count--; if (object->ref_count == 0) { vp->v_flag &= ~VTEXT; +#ifdef ENABLE_VFS_IOOPT vm_object_clear_flag(object, OBJ_OPT); +#endif } /* * vrele may need a vop lock @@ -496,8 +498,10 @@ doterm: if (temp) { TAILQ_REMOVE(&temp->shadow_head, object, shadow_list); temp->shadow_count--; +#ifdef ENABLE_VFS_IOOPT if (temp->ref_count == 0) vm_object_clear_flag(temp, OBJ_OPT); +#endif temp->generation++; object->backing_object = NULL; } @@ -547,11 +551,12 @@ vm_object_terminate(vm_object_t object) if (object->type == OBJT_VNODE) { struct vnode *vp; +#ifdef ENABLE_VFS_IOOPT /* * Freeze optimized copies. */ vm_freeze_copyopts(object, 0, object->size); - +#endif /* * Clean pages and flush buffers. */ @@ -1783,7 +1788,10 @@ vm_object_set_writeable_dirty(vm_object_t object) } } +#ifdef ENABLE_VFS_IOOPT /* + * Experimental support for zero-copy I/O + * * Performs the copy_on_write operations necessary to allow the virtual copies * into user space to work. This has to be called for write(2) system calls * from other processes, file unlinking, and file size shrinkage. @@ -1859,6 +1867,7 @@ vm_freeze_copyopts(vm_object_t object, vm_pindex_t froma, vm_pindex_t toa) vm_object_clear_flag(object, OBJ_OPT); } +#endif #include "opt_ddb.h" #ifdef DDB |
