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o Condition the compilation and use of vm_freeze_copyopts()

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on ENABLE_VFS_IOOPT.
This commit is contained in:
Alan Cox 2002-05-06 05:45:57 +00:00
parent 6953f5da1a
commit c0b6bbb80b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=96095
4 changed files with 16 additions and 3 deletions
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3
sys/ufs/ufs/ufs_readwrite.c
View File

@ -473,12 +473,13 @@ WRITE(ap)
if ((ioflag & IO_SYNC) && !DOINGASYNC(vp))
flags = B_SYNC;
#ifdef ENABLE_VFS_IOOPT
if (object && (object->flags & OBJ_OPT)) {
vm_freeze_copyopts(object,
OFF_TO_IDX(uio->uio_offset),
OFF_TO_IDX(uio->uio_offset + uio->uio_resid + PAGE_MASK));
}
#endif
for (error = 0; uio->uio_resid > 0;) {
lbn = lblkno(fs, uio->uio_offset);
blkoffset = blkoff(fs, uio->uio_offset);

3
sys/vm/vm_fault.c
View File

@ -276,12 +276,13 @@ RetryFault:;
fs.vp = vnode_pager_lock(fs.first_object);
vm_object_pip_add(fs.first_object, 1);
#ifdef ENABLE_VFS_IOOPT
if ((fault_type & VM_PROT_WRITE) &&
(fs.first_object->type == OBJT_VNODE)) {
vm_freeze_copyopts(fs.first_object,
fs.first_pindex, fs.first_pindex + 1);
}
#endif
fs.lookup_still_valid = TRUE;
if (wired)

11
sys/vm/vm_object.c
View File

@ -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

2
sys/vm/vnode_pager.c
View File

@ -291,7 +291,9 @@ vnode_pager_setsize(vp, nsize)
* File has shrunk. Toss any cached pages beyond the new EOF.
*/
if (nsize < object->un_pager.vnp.vnp_size) {
#ifdef ENABLE_VFS_IOOPT
vm_freeze_copyopts(object, OFF_TO_IDX(nsize), object->size);
#endif
if (nobjsize < object->size) {
vm_object_page_remove(object, nobjsize, object->size,
FALSE);