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MFS doesn't bother to associate a struct mount with the vnode...so work

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around this by not trying to cluster this type of I/O.

Submitted by:	John Dyson
This commit is contained in:
David Greenman 1995-01-11 01:53:18 +00:00
parent b7a1a0a5ff
commit c3d05da5e3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5484
1 changed files with 16 additions and 18 deletions
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34
sys/kern/vfs_bio.c
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@ -18,7 +18,7 @@
* 5. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: vfs_bio.c,v 1.18 1995/01/10 07:32:35 davidg Exp $
* $Id: vfs_bio.c,v 1.19 1995/01/10 09:20:34 davidg Exp $
*/
/*
@ -658,14 +658,14 @@ vfs_bio_awrite(struct buf * bp)
int i;
daddr_t lblkno = bp->b_lblkno;
struct vnode *vp = bp->b_vp;
int size = vp->v_mount->mnt_stat.f_iosize;
int s;
int ncl;
struct buf *bpa;
s = splbio();
ncl = 1;
if (vp->v_flag & VVMIO) {
if( vp->v_mount && (vp->v_flag & VVMIO) &&
(bp->b_flags & (B_CLUSTEROK|B_INVAL)) == B_CLUSTEROK) {
int size = vp->v_mount->mnt_stat.f_iosize;
for (i = 1; i < MAXPHYS / size; i++) {
if ((bpa = incore(vp, lblkno + i)) &&
((bpa->b_flags & (B_BUSY | B_DELWRI | B_BUSY | B_CLUSTEROK | B_INVAL)) == B_DELWRI | B_CLUSTEROK) &&
@ -678,18 +678,21 @@ vfs_bio_awrite(struct buf * bp)
}
}
ncl = i;
/*
* this is a possible cluster write
*/
if (ncl != 1) {
cluster_wbuild(vp, NULL, size, lblkno, ncl, -1);
splx(s);
return;
}
}
/*
* we don't attempt to cluster meta-data or INVALID??? buffers
* default (old) behavior, writing out only one block
*/
if ((ncl != 1) &&
(bp->b_flags & (B_INVAL | B_CLUSTEROK)) == B_CLUSTEROK) {
cluster_wbuild(vp, NULL, size, lblkno, ncl, -1);
} else {
bremfree(bp);
bp->b_flags |= B_BUSY | B_ASYNC;
bwrite(bp);
}
bremfree(bp);
bp->b_flags |= B_BUSY | B_ASYNC;
bwrite(bp);
splx(s);
}
@ -879,13 +882,8 @@ getblk(struct vnode * vp, daddr_t blkno, int size, int slpflag, int slptimeo)
int s;
struct bufhashhdr *bh;
vm_offset_t off;
int bsize;
int nleft;
bsize = DEV_BSIZE;
if (vp->v_mount) {
bsize = vp->v_mount->mnt_stat.f_iosize;
}
s = splbio();
loop:
if ((cnt.v_free_count + cnt.v_cache_count) <