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| author | Matthew Dillon <dillon@FreeBSD.org> | 1999-01-21 08:29:12 +0000 |
|---|---|---|
| committer | Matthew Dillon <dillon@FreeBSD.org> | 1999-01-21 08:29:12 +0000 |
| commit | 1c7c3c6a869e5eb64a19fda327dbe9f37af584b2 (patch) | |
| tree | 7fdc5292f8aa97dbc631f433cac4d9874b2c10a0 /sys/vm/vnode_pager.c | |
| parent | 7090df5aedf992f32acd3e943feef5610de2a3d0 (diff) | |
| download | src-1c7c3c6a869e5eb64a19fda327dbe9f37af584b2.tar.gz src-1c7c3c6a869e5eb64a19fda327dbe9f37af584b2.zip | |
This is a rather large commit that encompasses the new swapper,
changes to the VM system to support the new swapper, VM bug
fixes, several VM optimizations, and some additional revamping of the
VM code. The specific bug fixes will be documented with additional
forced commits. This commit is somewhat rough in regards to code
cleanup issues.
Reviewed by: "John S. Dyson" <root@dyson.iquest.net>, "David Greenman" <dg@root.com>
Notes
Notes:
svn path=/head/; revision=42957
Diffstat (limited to 'sys/vm/vnode_pager.c')
| -rw-r--r-- | sys/vm/vnode_pager.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c index fba7e2fbec27..fe04da480b96 100644 --- a/sys/vm/vnode_pager.c +++ b/sys/vm/vnode_pager.c @@ -38,7 +38,7 @@ * SUCH DAMAGE. * * from: @(#)vnode_pager.c 7.5 (Berkeley) 4/20/91 - * $Id: vnode_pager.c,v 1.100 1998/10/13 08:24:44 dg Exp $ + * $Id: vnode_pager.c,v 1.101 1998/12/04 18:39:44 rvb Exp $ */ /* @@ -88,6 +88,8 @@ struct pagerops vnodepagerops = { NULL }; +int vnode_pbuf_freecnt = -1; /* start out unlimited */ + /* * Allocate (or lookup) pager for a vnode. @@ -106,6 +108,13 @@ vnode_pager_alloc(void *handle, vm_ooffset_t size, vm_prot_t prot, if (handle == NULL) return (NULL); + /* + * XXX hack - This initialization should be put somewhere else. + */ + if (vnode_pbuf_freecnt < 0) { + vnode_pbuf_freecnt = nswbuf / 2 + 1; + } + vp = (struct vnode *) handle; /* @@ -395,7 +404,7 @@ vnode_pager_input_smlfs(object, m) fileaddr = vnode_pager_addr(vp, IDX_TO_OFF(m->pindex) + i * bsize, (int *)0); if (fileaddr != -1) { - bp = getpbuf(); + bp = getpbuf(&vnode_pbuf_freecnt); /* build a minimal buffer header */ bp->b_flags = B_BUSY | B_READ | B_CALL; @@ -428,7 +437,7 @@ vnode_pager_input_smlfs(object, m) /* * free the buffer header back to the swap buffer pool */ - relpbuf(bp); + relpbuf(bp, &vnode_pbuf_freecnt); if (error) break; @@ -707,7 +716,7 @@ vnode_pager_generic_getpages(vp, m, bytecount, reqpage) if (dp->v_type == VBLK || dp->v_type == VCHR) size = (size + DEV_BSIZE - 1) & ~(DEV_BSIZE - 1); - bp = getpbuf(); + bp = getpbuf(&vnode_pbuf_freecnt); kva = (vm_offset_t) bp->b_data; /* @@ -755,7 +764,7 @@ vnode_pager_generic_getpages(vp, m, bytecount, reqpage) /* * free the buffer header back to the swap buffer pool */ - relpbuf(bp); + relpbuf(bp, &vnode_pbuf_freecnt); for (i = 0, tfoff = foff; i < count; i++, tfoff = nextoff) { vm_page_t mt; |