jimzah/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src.git synced 2024-12-04 10:19:26 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

Eliminate vm_pager_map_page() and vm_pager_unmap_page() and their uses.

Browse Source 
Use sf_buf_alloc() and sf_buf_free() instead.
This commit is contained in:
Alan Cox 2004-04-06 07:12:32 +00:00
parent c1aec06a7c
commit 9e0ddbd00a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=127926
3 changed files with 12 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
sys/vm/vm_pager.c
View File

@ -267,26 +267,6 @@ vm_pager_deallocate(object)
* vm_pager_has_page() - inline, see vm/vm_pager.h
*/
vm_offset_t
vm_pager_map_page(m)
vm_page_t m;
{
vm_offset_t kva;
kva = kmem_alloc_wait(pager_map, PAGE_SIZE);
pmap_qenter(kva, &m, 1);
return (kva);
}
void
vm_pager_unmap_page(kva)
vm_offset_t kva;
{
pmap_qremove(kva, 1);
kmem_free_wakeup(pager_map, kva, PAGE_SIZE);
}
vm_object_t
vm_pager_object_lookup(pg_list, handle)
struct pagerlst *pg_list;

2
sys/vm/vm_pager.h
View File

@ -106,8 +106,6 @@ static __inline int vm_pager_get_pages(vm_object_t, vm_page_t *, int, int);
static __inline boolean_t vm_pager_has_page(vm_object_t, vm_pindex_t, int *, int *);
void vm_pager_init(void);
vm_object_t vm_pager_object_lookup(struct pagerlst *, void *);
vm_offset_t vm_pager_map_page(vm_page_t);
void vm_pager_unmap_page(vm_offset_t);
/*
* vm_page_get_pages:

22
sys/vm/vnode_pager.c
View File

@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
#include <sys/buf.h>
#include <sys/vmmeter.h>
#include <sys/conf.h>
#include <sys/sf_buf.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
@ -427,7 +428,7 @@ vnode_pager_input_smlfs(object, m)
int i;
struct vnode *dp, *vp;
struct buf *bp;
vm_offset_t kva;
struct sf_buf *sf;
int fileaddr;
vm_offset_t bsize;
int error = 0;
@ -442,7 +443,7 @@ vnode_pager_input_smlfs(object, m)
VOP_BMAP(vp, 0, &dp, 0, NULL, NULL);
kva = vm_pager_map_page(m);
sf = sf_buf_alloc(m, 0);
for (i = 0; i < PAGE_SIZE / bsize; i++) {
vm_ooffset_t address;
@ -466,7 +467,7 @@ vnode_pager_input_smlfs(object, m)
KASSERT(bp->b_wcred == NOCRED, ("leaking write ucred"));
bp->b_rcred = crhold(curthread->td_ucred);
bp->b_wcred = crhold(curthread->td_ucred);
bp->b_data = (caddr_t) kva + i * bsize;
bp->b_data = (caddr_t)sf_buf_kva(sf) + i * bsize;
bp->b_blkno = fileaddr;
pbgetvp(dp, bp);
bp->b_bcount = bsize;
@ -506,10 +507,10 @@ vnode_pager_input_smlfs(object, m)
vm_page_set_validclean(m, (i * bsize) & PAGE_MASK, bsize);
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(object);
bzero((caddr_t) kva + i * bsize, bsize);
bzero((caddr_t)sf_buf_kva(sf) + i * bsize, bsize);
}
}
vm_pager_unmap_page(kva);
sf_buf_free(sf);
vm_page_lock_queues();
pmap_clear_modify(m);
vm_page_flag_clear(m, PG_ZERO);
@ -534,7 +535,7 @@ vnode_pager_input_old(object, m)
struct iovec aiov;
int error;
int size;
vm_offset_t kva;
struct sf_buf *sf;
struct vnode *vp;
VM_OBJECT_LOCK_ASSERT(object, MA_OWNED);
@ -556,9 +557,9 @@ vnode_pager_input_old(object, m)
* Allocate a kernel virtual address and initialize so that
* we can use VOP_READ/WRITE routines.
*/
kva = vm_pager_map_page(m);
sf = sf_buf_alloc(m, 0);
aiov.iov_base = (caddr_t) kva;
aiov.iov_base = (caddr_t)sf_buf_kva(sf);
aiov.iov_len = size;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
@ -575,9 +576,10 @@ vnode_pager_input_old(object, m)
if (count == 0)
error = EINVAL;
else if (count != PAGE_SIZE)
bzero((caddr_t) kva + count, PAGE_SIZE - count);
bzero((caddr_t)sf_buf_kva(sf) + count,
PAGE_SIZE - count);
}
vm_pager_unmap_page(kva);
sf_buf_free(sf);
VM_OBJECT_LOCK(object);
}